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• How do I install on an UEFI Asus 1215b netbook?

  - by Tarek

  I'm trying to install Ubuntu 11.10 on a UEFI netbook Asus 1215b using an USB stick. I created a fat32 efi partition of 100MB, 2GB swap, and 2 ext4 partitions (for root (/ ) and /home, respectively). While installing, Ubuntu switches to CLI and starts running efibootmgr. After a few commands (sadly I don't have a screen grab), it stops displaying text but it's still running judging by the HDD led. Then, there's a weird graphic glitch and the screen turns off (HDD led still indicating activity). Finally, it just stops, but doesn't turn off. Not even a hard reboot works (holding down the power button a few secs). I have to plug the netbook off and remove the battery. After that, it still doesn't boot Ubuntu... Anyway, what can I do? I'm considering following the footsteps here and here. Edit: here is the syslog $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] BUG: unable to handle kernel paging request at 00000000ffe1867c $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] IP: [<ffff880066d44c1f>] 0xffff880066d44c1e $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] PGD 14ecc067 PUD 0 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Oops: 0000 [#1] SMP $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] CPU 0 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Modules linked in: cryptd aes_x86_64 ufs qnx4 hfsplus hfs minix ntfs msdos xfs reiserfs jfs bnep parport_pc rfcomm dm_crypt ppdev bluetooth lp parport joydev eeepc_wmi asus_wmi sparse_keymap uvcvideo videodev v4l2_compat_ioctl32 snd_hda_codec_realtek snd_seq_midi snd_hda_codec_hdmi snd_hda_intel snd_hda_codec arc4 snd_rawmidi snd_hwdep psmouse snd_pcm snd_seq_midi_event ath9k serio_raw sp5100_tco i2c_piix4 k10temp snd_seq mac80211 snd_timer ath9k_common ath9k_hw snd_seq_device ath snd cfg80211 soundcore snd_page_alloc binfmt_misc squashfs overlayfs nls_iso8859_1 nls_cp437 vfat fat dm_raid45 xor dm_mirror dm_region_hash dm_log btrfs zlib_deflate libcrc32c usb_storage uas radeon video ahci libahci ttm drm_kms_helper drm wmi i2c_algo_bit atl1c $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Pid: 28432, comm: efibootmgr Not tainted 3.0.0-12-generic #20-Ubuntu ASUSTeK Computer INC. 1215B/1215B $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RIP: 0010:[<ffff880066d44c1f>] [<ffff880066d44c1f>] 0xffff880066d44c1e $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RSP: 0018:ffff88005e2cbab0 EFLAGS: 00010082 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RAX: 00000000ffe1867c RBX: 0000000000000009 RCX: 00000000ffe1867c $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RDX: 0000000000000000 RSI: ffff88005e2cbbea RDI: ffff88005e2cbb40 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RBP: 00000000ffe1867c R08: 0000000000000000 R09: 0000000000000084 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] R10: ffffc9001101ff83 R11: ffffc90011018685 R12: 0000000000000001 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] R13: 0000000000000000 R14: ffffc9001101867c R15: ffff88005e2cbbe1 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] FS: 00007f9cdde13720(0000) GS:ffff880066a00000(0000) knlGS:0000000000000000 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] CR2: 00000000ffe1867c CR3: 000000002dace000 CR4: 00000000000006f0 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Process efibootmgr (pid: 28432, threadinfo ffff88005e2ca000, task ffff880014f0dc80) $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Stack: $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] ffffc90011010000 ffff88005e2cbac8 0000000000010000 ffff880066d4401d $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] 000000000000007c ffff880009e84400 0000000000000090 ffff880066d45738 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] ffffc9001101867c ffff880066d4331c 0000000000000009 ffffc9001101867b $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Call Trace: $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff815e9efe>] ? _raw_spin_lock+0xe/0x20 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff811d9c2d>] ? open+0x10d/0x1b0 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff8116554b>] ? __dentry_open+0x2bb/0x320 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff811d9b20>] ? bin_vma_open+0x70/0x70 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff815e9efe>] ? _raw_spin_lock+0xe/0x20 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff811849ee>] ? vfsmount_lock_local_unlock+0x1e/0x30 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff8104303b>] ? efi_call5+0x4b/0x80 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff81042a7f>] ? virt_efi_set_variable+0x2f/0x40 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff814bb125>] ? efivar_create+0x1e5/0x280 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff811d9d63>] ? write+0x93/0x190 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff811d9de4>] ? write+0x114/0x190 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff81167813>] ? vfs_write+0xb3/0x180 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff81167b3a>] ? sys_write+0x4a/0x90 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] [<ffffffff815f22c2>] ? system_call_fastpath+0x16/0x1b $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] Code: ec 01 75 f0 41 bc 01 00 00 00 e8 e5 fb ff ff e8 e4 fc ff ff 33 c0 44 0f b7 c0 66 3b c3 73 20 41 0f b7 c0 41 0f b7 d0 03 c5 8b c8 <8a> 00 42 38 04 3a 75 0a 66 45 03 c4 66 44 3b c3 72 e2 33 c0 66 $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RIP [<ffff880066d44c1f>] 0xffff880066d44c1e $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] RSP <ffff88005e2cbab0> $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] CR2: 00000000ffe1867c $Oct 21 01:05:17 ubuntu kernel: [ 1220.544009] ---[ end trace 493844b002da4787 ]---

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• ecryptfs - decrypt and mount at boot with USB key

  - by Josh McGee

  I have a system running Ubuntu Server as a testbed for some services that I want to get familiar with. I decided to let the installation procedure set up encryption. I knew all along that I would have to decrypt it with the passphrase in order to get the system booted, but I assumed it wouldn't matter since it will only boot once or twice a month. However, my brother has informed me that he is a victim of power outages at the residence where this server is located. This means we have to explain to his girlfriend how to turn on the computer, attach a keyboard, connect a monitor (she just can't understand that she can type to the computer without a display, so whatever) and input the passphrase for us, while we are at work. I have arrived at the conclusion that I should just put together a USB key that can be plugged in before powering on the computer, to avoid all the trouble. Is this possible with ecryptfs? Is there a tutorial or simple list of instructions available so that I can knock this out and focus back on the stuff I care about? EDIT: I am aware that this is possible with LUKS and dm-crypt, but unfortunately the magical encryption that Ubuntu hands you during the installation is only ecryptfs so my question is specific to that.

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• UEFI Boot Failure - Hang after Printing USB Information

  - by James

  I'm experiencing a really weird boot problem. With both 12.10 and 12.04LTS, the vast majority of kernels (and initrds) that I've tried boot, but hang immediately after printing out information about USB devices. This isn't exactly a full "hang" so to speak, as if I plug in a flash drive, I see information and a /dev/sd* entry printed to the screen. Post/pre-init scripts are not run, there is no handoff, nor busybox or VT prompt. Virtual terminals can't be changed (with Ctrl-Alt-Fx). For what I can see, init may have not been executed yet. With certain kernel and OS combinations however, (specifically 3.2.0-29), I get a full boot and am able to use the OS as if there is no problem. After 3.2.0-29, I've been hard pressed to find a kernel that works. Any idea what's happening or how to fix this? Or even a road to take? I've exhausted the first five pages of Google for every search term I can think of. This is a Lenovo Z580 (i5-3210M) with Phoenix SecureCore Tiano firmware, if that helps any.

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• Oracle Virtual Desktop Client with USB smart card reader

  - by wim.coekaerts

  I have my Sun Ray thin client at home which I use religiously, I use a Sun Ray 3i at work as my main desktop and just always take my smart card home and happily continue with the hot desking feature. We released a software version of the Sun Ray client called Oracle Virtual Desktop Client (OVDC). There is a version for Windows, Linux and Mac OS X. I have a minimac at home and I installed OVDC on it, which of course works great but since I like to re-connect to my session that I use at work, I wanted to try out the external usb smart card reader feature. I ordered a cute, low cost device online and tried it out. As expected, it worked out of the box without -any- configuration. I took the device, plugged it into my minimac, started OVDC, plugged in my smartcard and I got the password screen (screensaver) to get into my sun ray session on my server at work. Nothing new here, this is a feature that's been in the product but I had never tried it before and it works out of the box and is super easy and I just felt like sharing :-) Here are a few pictures : (1) login screen (2) smart cardreader without card (3) password screen (4) smart card reader with card

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• Repair ext4 filesystem on USB drive

  - by phineas

  Yet another filesystem question. I wanted to use a USB drive that I hadn't mounted for a month or so and was surprised by the fact Ubuntu was unable to mount it. I looked it up in the disk utility and it said it discovered a device with 17 MB instead of 2 GB. The hardware looks intact, I hope for the best for repairing the ext4 filesystem. I followed the instructions from HOWTO: Repair a broken Ext4 Superblock in Ubuntu, but I wasn't successful. # fsck.ext4 -v /dev/sdb e2fsck 1.42.5 (29-Jul-2012) ext2fs_open2: Bad magic number in super-block fsck.ext4: Superblock invalid, trying backup blocks... fsck.ext4: Bad magic number in super-block while trying to open /dev/sdb The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 Filesystem blocks are invalid, however when I run the recommended solution to try the alternate superblock, I get the following output: # e2fsck -b 8193 /dev/sdb e2fsck 1.42.5 (29-Jul-2012) e2fsck: Invalid argument while trying to open /dev/sdb plus the same error message as in the last paragraph above. Any ideas how to recover the drive? Thank you very much! Edit: testdisk won't help. I'm still stunned why the tools only discover 17 MB.

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• Can't connect to Wireless Network - Ubuntu 12.04 LTS & Sabrent A111N USB Dongle

  - by Ohgodwhy

  I've been trying to connect to this network for quite some time. I can't directly connect to the router with a Wire, but can access the Router with other wireless devices without any issues. I had previously tried several other Wifi nic's but none of them would load properly. Today, i went and bought a new (supported) Sabrent A111N USB Dongle, which said explicitly that it works with Linux 2.4 +. I popped the Dongle in, and low-and-behold it immediately said that there were Available Wireless Connections. I selected my connection and tried to connect, but it just loops constantly while saying Wireless Disconnected then attempts to connect again over and over. ifconfig and iwconfig both show my device in a ready and working state. However, iwlist wlan0 scan says that there are no results found. I don't get it... At one point, I could see the CPU in the DHCP client list under the router, but it doesn't fully make the connection (something about a timeout?). Any help would be appreciated. Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN

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• Ubuntu black screen after Installation of 12.10 Live USB

  - by Lime0fHint

  My computer was made in 2004, but I'm sure it doesn't matter since it's a durable machine. So recently, I decided to breathe new life to it with Linux. I tried Lubuntu 12.10, Nope. Black screen after install. So I tried Ubuntu 12.10 when I gave up, and same exact thing. Except, this time I'm fighting for it, since Ubuntu is the best OS I've ever seen. So back on-topic, when I start the installation, it says that something is already mounted (Sda or something of the sorts) So I just figure that it's the Live USB I'm using. So I let it ignore it, and move on. The rest of the installation goes smooth, all looks fine. Then I get to the screen with the introductory to Ubuntu. Meanwhile, it's still installing, but finishing up. I'm not sure if the install actually finishes, but I do know that after a bit, the screen goes back to the desktop. The install closes and I'm back at the desktop, and the cursor is showing the "loading" symbol, as if it were still working. Then the screen goes black, with the same cursor. After that, nothing. I left it over night like that thinking it was doing something, in the morning it was still black with the cursor circling or whatever. So what could be causing this? One concern I have is that I have a Nvidia graphics card (7300 GT). I heard that Nvidia isn't compatible with Linux? I did notice that it was marked as unreconigsed by Ubuntu, so is that the problem perhaps?

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• Fresh install of 12.04 using USB stick booted into tty1

  - by croc

  I just installed 12.04 Alternate for the first time to give it a try using a USB stick burned with UnetBootIn. It installed without a problem. But it booted into a tty1 console without booting into a GUI. After logging into the tty1 console, I typed unity. It appeared that the system doesn't have unity desktop. How can it be solved? My installation didn't show any error. Something worth mentioning: During installation, I had to choose an option saying 'customize the system to your needs' something like that I don't remember correctly with options 'SSH server','Mail Server', 'Ubuntu Desktop',.....,'Manual selection of packages' etc. I chose 'Ubuntu Desktop'. I haven't encountered something like this in 11.04. To do an installation of Alternate iso using UnetBootIn, i used '12.04_Hdmedia' option of that software and had to change file extension of .ude to .udeb in /pool/main/l/linux that i found in Alternate ubuntu cdrom detect to go around with the cdrom detection problem. I have a 945G intel graphics.

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• Problem with an application on USB, a tricky one

  - by rajivpradeep

  I have this application on USB built in VS 2008, on win7 , the USb has two partitions one hidden and other normal one, when i run the application on normal part , it has to swap the part to hidden and run the applications present in hidden part. When i run the application in normal part from USB , the memory swaps but the applications in hidden part are not run. but i can see the application running in Task manager. when i copy the application and run it from the desktop, the application works seamlessly, without any glitch. I guess some thing is holding the application process when run from USB, i cannot safe eject the USB too. CAn some one give me a clue as to what can be done to resolve. Also the application works well on Windows 7 as expected. The problem is on XP

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• How does plugging in a SATA drive to an SAS backplane affect maximum cable length?

  - by user179658

  The limit on SATA cable length is 1m, whereas the limit on SAS cable length is 10m. When using a backplane which advertises support for SAS and SATA, with a SAS RAID controller and one SATA drive, will the controller use the SAS PHY scheme, allowing for the 10m cable length maximum (to accommodate the long backplane), or will it use the SATA one and allow for only the SATA cable length maximum of 1m?

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• The USB mouse sticks in Windows 7 after automatic attempt to fix the boot

  - by chelder

  Avast Antivirus asked me to delete a probable virus and to restart to perform a checking. I had to stop the checking at the middle of the procedure as I needed the computer. It was imposible to turn off the computer pushing the power button (as it entered in suspension mode, no matter how long I kept pushed the power button). I removed the battery as the only way to restart the computer. Windows 7 said that there is a problem to iniziate Windows. Windows 7 tried to fix the problem without success. Windows 7 started after that though. Everything is OK but the USB mouse. The USB mouse sticks and freezes each couple of seconds more or less. The tactile mouse (PS2) works well. I googled for solutions but the posible solutions didn't work for me. What happened? How could I fix it without formatting and reinstalling everything? UPDATE: this is what I did: Change the mouse from one usb port to another Test another mouse Set the number of cores of the CPU manually with msconfig Power management: not disable usb ports Check hard disk errors

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• Random process hangs after clean install

  - by Toshe

  After installing fresh Kubuntu 11.04 Natty on my desktop PC, I experienced some issues with application and process hangs. There is also a problem with my USB 3 hard disk. These sort of problems did not happen on Kubuntu 10.10 installed on the same PC (on separate partition). The hangs manifest themselves with kernel log messages like these: [ 960.480151] INFO: task amarok:2505 blocked for more than 120 seconds. [ 960.480153] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 960.480155] amarok D 0000000000000000 0 2505 1 0x00000000 [ 960.480158] ffff8800a556bb38 0000000000000086 ffff8800a556bfd8 ffff8800a556a000 [ 960.480162] 0000000000013d00 ffff8800cb7f3178 ffff8800a556bfd8 0000000000013d00 [ 960.480165] ffffffff81a0b020 ffff8800cb7f2dc0 ffffea000242ac58 ffff88012704c870 [ 960.480169] Call Trace: [ 960.480172] [<ffffffff815c19f7>] __mutex_lock_slowpath+0xf7/0x180 [ 960.480175] [<ffffffff815c144b>] mutex_lock+0x2b/0x50 [ 960.480180] [<ffffffffa0d0ad42>] video_open+0x102/0x400 [cx8800] [ 960.480183] [<ffffffff815c2cbe>] ? _raw_spin_lock+0xe/0x20 [ 960.480186] [<ffffffff8117c55d>] ? __d_lookup+0x10d/0x170 [ 960.480191] [<ffffffffa0ca0731>] v4l2_open+0x101/0x130 [videodev] [ 960.480194] [<ffffffff81168f4a>] chrdev_open+0xda/0x1f0 [ 960.480197] [<ffffffff81168e70>] ? chrdev_open+0x0/0x1f0 [ 960.480200] [<ffffffff81162cee>] __dentry_open+0xce/0x2f0 [ 960.480202] [<ffffffff8116ef33>] ? generic_permission+0x23/0xc0 [ 960.480205] [<ffffffff811641e1>] nameidata_to_filp+0x71/0x80 [ 960.480208] [<ffffffff811733c8>] finish_open+0xc8/0x1b0 [ 960.480210] [<ffffffff811725b7>] ? do_path_lookup+0x87/0x160 [ 960.480213] [<ffffffff81173b88>] do_filp_open+0x2c8/0x7c0 [ 960.480216] [<ffffffff81172902>] ? user_path_at+0x62/0xa0 [ 960.480219] [<ffffffff81131d4d>] ? handle_mm_fault+0x16d/0x250 [ 960.480222] [<ffffffff812e6c47>] ? __strncpy_from_user+0x27/0x60 [ 960.480225] [<ffffffff81180ea7>] ? alloc_fd+0xf7/0x150 [ 960.480228] [<ffffffff8116425a>] do_sys_open+0x6a/0x150 [ 960.480230] [<ffffffff81164360>] sys_open+0x20/0x30 [ 960.480233] [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b [ 1080.480027] INFO: task knotify4:1663 blocked for more than 120 seconds. [ 1080.480030] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1080.480032] knotify4 D 0000000000000000 0 1663 1 0x00000000 [ 1080.480036] ffff880123a2bb28 0000000000000082 ffff880123a2bfd8 ffff880123a2a000 [ 1080.480040] 0000000000013d00 ffff880121003178 ffff880123a2bfd8 0000000000013d00 [ 1080.480044] ffff8800cb7e16e0 ffff880121002dc0 ffffffff81060a27 ffff88012704c870 [ 1080.480048] Call Trace: [ 1080.480054] [<ffffffff81060a27>] ? mutex_spin_on_owner+0x97/0xd0 [ 1080.480059] [<ffffffff815c19f7>] __mutex_lock_slowpath+0xf7/0x180 [ 1080.480069] [<ffffffff812e4f61>] ? vsnprintf+0x221/0x620 [ 1080.480072] [<ffffffff815c144b>] mutex_lock+0x2b/0x50 [ 1080.480076] [<ffffffffa0b2d10f>] cx8802_request_acquire+0x5f/0xf0 [cx8802] [ 1080.480081] [<ffffffffa0e87e08>] mpeg_open+0x78/0x270 [cx88_blackbird] [ 1080.480084] [<ffffffff8117c55d>] ? __d_lookup+0x10d/0x170 [ 1080.480092] [<ffffffffa0ca0731>] v4l2_open+0x101/0x130 [videodev] [ 1080.480096] [<ffffffff81168f4a>] chrdev_open+0xda/0x1f0 [ 1080.480099] [<ffffffff81168e70>] ? chrdev_open+0x0/0x1f0 [ 1080.480102] [<ffffffff81162cee>] __dentry_open+0xce/0x2f0 [ 1080.480105] [<ffffffff8116ef33>] ? generic_permission+0x23/0xc0 [ 1080.480108] [<ffffffff811641e1>] nameidata_to_filp+0x71/0x80 [ 1080.480111] [<ffffffff811733c8>] finish_open+0xc8/0x1b0 [ 1080.480113] [<ffffffff811725b7>] ? do_path_lookup+0x87/0x160 [ 1080.480116] [<ffffffff81173b88>] do_filp_open+0x2c8/0x7c0 [ 1080.480119] [<ffffffff81172902>] ? user_path_at+0x62/0xa0 [ 1080.480122] [<ffffffff811663f1>] ? get_empty_filp+0xa1/0x170 [ 1080.480125] [<ffffffff812e6c47>] ? __strncpy_from_user+0x27/0x60 [ 1080.480128] [<ffffffff81180ea7>] ? alloc_fd+0xf7/0x150 [ 1080.480131] [<ffffffff8116425a>] do_sys_open+0x6a/0x150 [ 1080.480134] [<ffffffff81164360>] sys_open+0x20/0x30 [ 1080.480137] [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b [ 1080.480147] INFO: task dolphin:1842 blocked for more than 120 seconds. [ 1080.480148] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1080.480150] dolphin D 0000000000000000 0 1842 1 0x00000004 [ 1080.480154] ffff8800cb4f3b38 0000000000000082 ffff8800cb4f3fd8 ffff8800cb4f2000 [ 1080.480157] 0000000000013d00 ffff8800cb7f4858 ffff8800cb4f3fd8 0000000000013d00 [ 1080.480161] ffffffff81a0b020 ffff8800cb7f44a0 ffffea000267b0d0 ffff88012704c870 [ 1080.480164] Call Trace: [ 1080.480168] [<ffffffff815c19f7>] __mutex_lock_slowpath+0xf7/0x180 [ 1080.480171] [<ffffffff815c144b>] mutex_lock+0x2b/0x50 [ 1080.480176] [<ffffffffa0d0ad42>] video_open+0x102/0x400 [cx8800] [ 1080.480179] [<ffffffff815c2cbe>] ? _raw_spin_lock+0xe/0x20 [ 1080.480181] [<ffffffff8117c55d>] ? __d_lookup+0x10d/0x170 [ 1080.480186] [<ffffffffa0ca0731>] v4l2_open+0x101/0x130 [videodev] [ 1080.480190] [<ffffffff81168f4a>] chrdev_open+0xda/0x1f0 [ 1080.480192] [<ffffffff81168e70>] ? chrdev_open+0x0/0x1f0 [ 1080.480195] [<ffffffff81162cee>] __dentry_open+0xce/0x2f0 [ 1080.480198] [<ffffffff8116ef33>] ? generic_permission+0x23/0xc0 [ 1080.480200] [<ffffffff811641e1>] nameidata_to_filp+0x71/0x80 [ 1080.480203] [<ffffffff811733c8>] finish_open+0xc8/0x1b0 [ 1080.480206] [<ffffffff811725b7>] ? do_path_lookup+0x87/0x160 [ 1080.480208] [<ffffffff81173b88>] do_filp_open+0x2c8/0x7c0 [ 1080.480211] [<ffffffff81172902>] ? user_path_at+0x62/0xa0 [ 1080.480214] [<ffffffff81131d4d>] ? handle_mm_fault+0x16d/0x250 [ 1080.480217] [<ffffffff812e6c47>] ? __strncpy_from_user+0x27/0x60 [ 1080.480220] [<ffffffff81180ea7>] ? alloc_fd+0xf7/0x150 [ 1080.480223] [<ffffffff8116425a>] do_sys_open+0x6a/0x150 [ 1080.480225] [<ffffffff81164360>] sys_open+0x20/0x30 [ 1080.480228] [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b Attempts to kill the hung process are unsuccessful: root@deskpc:~# ps -ef |grep amarok myuser 2505 1 0 10:47 ? 00:00:00 /usr/bin/amarok root 2747 2020 0 11:06 pts/3 00:00:00 grep --color=auto amarok root@deskpc:~# kill -9 2505 root@deskpc:~# ps -ef |grep amarok myuser 2505 1 0 10:47 ? 00:00:00 /usr/bin/amarok root 2749 2020 0 11:06 pts/3 00:00:00 grep --color=auto amarok root@deskpc:~# kill -9 2505 root@deskpc:~# ps -ef |grep amarok myuser 2505 1 0 10:47 ? 00:00:00 /usr/bin/amarok root 2751 2020 0 11:06 pts/3 00:00:00 grep --color=auto amarok root@deskpc:~# When trying to access my external USB3 disk, the following kernel message is observed: [ 2169.330012] xhci_hcd 0000:06:00.0: Timeout while waiting for a slot [ 2169.330018] hub 3-0:1.0: couldn't allocate port 1 usb_device I am not sure the two problems (application hangs and USB3 timeouts are related) but they do not happen under Kubuntu 10.10. Judging by the dmesg messages, it looks to me that this is a kernel (or potentially kernel driver) problem, but not sure how to debug it. Any ideas? I ran apport-bug, but it advised me to post a question here first. Shall I report the issue on the official K/Ubuntu bugzilla?

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• Daisychain external USB drive to WD My Book World Edition (Blue rings)

  - by d03boy

  I recently bought a new My Book Essential 1TB (WDBACW0010HBK-NESN) to daisychain to my older My Book World Edition 500GB (blue rings) with one of the version 01.xx.xx firmwares. At first when I connected the USB drive to the MBWE, it showed up in the System Summary section of the administration page without any issue. I was able to set up a new share on the new drive. The administration website moved very, very slow though. The administration pages became nearly unresponsive during this setup process. Once the share was set up I could access the new share but again, it was very slow, now through Windows Explorer. I looked around the internet and it seems that this is caused by the USB drive being formatted with NTFS. I tried reformatting it (again, as NTFS) just to double check and the same problem occurred. I then tried FAT32 but realized it would only support files of approximately 2GB and that is not acceptable for me. I decided to try a firmware upgrade on the MBWE to version 02.00.19. The firmware upgrade completed successfully but now the MBWE does not display the USB drive in the System Summary like it did with the earlier firmware version. The USB drive works perfectly fine when connected directly to my computer. Is there a way to solve this issue?

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• Windows VirtualBox failed to attach USB device to Linux Guest

  - by joltmode

  I have Windows 7 64bit Host system, and I am using VirtualBox 4.1.18 (r78361). I have an Arch Linux Guest OS. I have installed VirtualBox Extension Pack (to enable USB2 support) and added my USB device filter to VM. I have also installed the Guest Additions provided by Arch: virtualbox-archlinux-additions (but I have no idea whether it's actually needed for my environment). I can see my USB device from VirtualBox Devices menu. Whenever I am trying to access it, I end up with: Failed to attach the USB device Kingston DT 100 G2 [0100] to the virtual machine Archlinux. USB device 'Kingston DT 100 G2' with UUID {a836ec33-0f41-4ca7-a31d-09cceaf5d173} is busy with a previous request. Please try again later. Details ? Result Code:    E_INVALIDARG (0x80070057) Component:      HostUSBDevice Interface:      IHostUSBDevice {173b4b44-d268-4334-a00d-b6521c9a740a} Callee:         IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb} From what I have googled, most guides shows how to solve this the other way around - Linux Host to Windows Guest. How do I resolve this? Update I have tried to Eject (virtually, not physically) the device from my Windows Host system and then try to access the Device from Guest. Same error.

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• Detect When Network Cable Unplugged

  - by Changeling

  Windows knows when you have removed the network cable from your NIC. Is there a programmatic way to determine this via API in C++? Note: I am not using .NET

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• Synchronizing time between two Windows 7 machines connected with a LAN cable

  - by Markus Roth

  I have a number laptops that run our application while connected to each other in pairs with an ethernet cable, but not connected to any external network or the internet. T I need the connected pair to synchronize their system times, but since every computer needs to be able to synch with any other computer, I can't define one computer to be a time-server and the other to be a client. Is there a way to do this with NTP? Or some other way?

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• Thomson TCM 420 internal firewall deactivation

  - by KB22

  Hi all, I'm having a really hard time with getting a box into active torrent mode. Windows firewall etc. is done, the actual problem seems to relate to the cable modem which is used to connect the box to the net. It's a Thomson TCM 420 which 'claims' to have an internal firewall. IMHO this internal FW keeps me from using the port I opened for torrenting. To cut it short: is there a way to disable that firewall? The web administration interface of the modem does not provide that option. thanks in advance K

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• UPS: Do i require a special extension cord for power in?

  - by rism

  I have a couple of Tripplite UPS systems. The power in cables are bright orange and about 2 meters in length. I want to put the system on the other side of the room but for some reason the UPS keep "going off" over there. So I guess the wall power sockets on that side of the room are a little dodgy. So i figured Id just go online and get some replacement UPS power IN (from wall to UPS) cables of an appropriate length. But i cant find any anywhere. (auction sites, tripplite store, cable websites). So now I'm wondering if that's just because you can use a standard extension cord of an appropriate wattage? I thought the UPS power IN cables were "special". Is that not so?

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• How to setup PPTP-VPN on ubuntu and how to run ?

  - by NAVEED

  I was using my cable internet on windows and it was working. Now I moved to ubuntu for development work. But I am unable to connect this internet on ubuntu. I called their technical support and they ask me to install PPTP (I have forgot the exact name) and then provide our server name, my username and passowrd. I downloaded(from windows internet) PPTP debian and install it but I did not find it after installation. From where can I use this client?? can someone tell me that how to install PPTP on ubuntu without internet and how to run this software and how to use? Thanks

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• How to setup PPTP-VPN on ubuntu and how to run ?

  - by NAVEED

  I was using my cable internet on windows and it was working. Now I moved to ubuntu for development work. But I am unable to connect this internet on ubuntu. I called their technical support and they ask me to install PPTP (I have forgot the exact name) and then provide our server name, my username and passowrd. I downloaded(from windows internet) PPTP debian and install it but I did not find it after installation. From where can I use this client?? can someone tell me that how to install PPTP on ubuntu without internet and how to run this software and how to use? Thanks

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• I've inherited a rat's nest of cabling. What now?

  - by hydroparadise

  You know, you see pictures like below and sort of chuckle until you actually have to deal with it. I have just inherited something that looks like the picture below. The culture of the organization does not tolerate down time very well, yet I have been tasked to 'clean it up'. The network functions as it is, and there doesn't seem to be rush to get it done, but I will have to tackle the bear at some point. I get the ugly eye when I mention anything about weekends. So my question goes, is there sort of a structured approach to this problem? My Ideas thus far: Label, Label, Label Make up my patch cables of desired length ahead of time Do each subnet at a time (appears that each subnet are for different physical locations) Replace one cable at a time for each subnet It's easier to get forgiveness than permision?

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• What is Light Peak

  - by Jonathan.

  I've heard this a lot recently, todo with Apple and Intel. Some says it's a protocol, others say it's fibre optic, and others say it's copper. One source even said it was a "wireless wire". Apparently it can carry data, but not video streams, surely the cable can't know the difference between 1s and 0s representing data, and 1s and 0s representing video streams. Or it will replace all the wires we currently have except power, another place said it is for inside laptops. Those are just examples so I haven't given any sources, I just want to know what on Earth Light Peak is?

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• Planning home network

  - by gakhov

  I'm planning to setup my home network from scratch and want to ask professional opinions or tips. My home is connected to Internet with a cable connection (100 Mb/s). The devices I would like to connect are VoIP phone (RJ-45), TV (WiFi/LAN), 3 laptops (WiFi), 2 smartphones (WiFi), an iPad (WiFi), a Kindle (WiFi), a network printer and, probably, a home media storage (WiFi/LAN). As you can see, the most load will be on WiFi connections (probably, even if TV supports WiFi it's better to connect it by LAN?). So, I need help to choose the best router (or combination of routers) to support stable connections for all these devices and minimize the total number of routers/adapters. I like how Cisco/Linksys devices were working for me in the past, so preferably (but not obligatorily) I want to setup network with their solutions. Any thoughts?

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• What laptops can run an external 27" or 30" screen at 2560x1600 native resolution? [closed]

  - by Moin Zaman

  SU Folks, What laptops do you know off that can run a 27" or 30" external monitor as a secondary display (Extending desktop onto second screen, without switching off the laptop's own built in screen) at the screens native resolution of 2560x1600. I'm not interested docks or USB video adapters etc. Just via the laptop's built in display ports. List the port used and cable as well if possible. Reference links / posts that confirm it are an added bonus. I'm hoping people who've tried it themselves and / or confirmed it can list specific models of laptops so we can build up a good list.

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• Using a Token-ring network card instead of a router (?)

  - by John

  I have cable, and the modem only has 1 network plug-in. They said I could buy my own router if I wanted to hook up two computers to it. I have an IBM Turbo 16/4 Token-Ring PC Card 2, which was in the laptop when I bought it, and the laptop also has the typical network plug (not a PC Card). Is there a way I could run the laptop as a server, and plug my desktop into the laptop, so they both have internet without my having to buy a router? (I realize routers are as cheap as $30.) Both computers run Windows XP Pro SP3. (I also have an 10/100 Etherjet Cardbus card (PC Card)). Thanks.

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