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  • Is Accessing USB from web application for cross browser cross os possible at all ?

    - by Ved
    Hey Guys, I am wondering if there is anyway we can achieve this. I heard different things about Silverlight 4 , Java Script or Active X control but not seen any demo of code for any of them. Does anyone know any web component that is available or how to write one. We really like capture client's USB drive via Web and read/write data on it. This has to work for ANY Operating system in Any web browser. Thanks UPDATED What about WPF in browser mode...I read that I can host my wpf apps inside browser and sort of like smart client. Here is a great example of doing this via silverlight 4 but author mentions about possibility of accessing USB on MAC via 1) Enable executing AppleScripts. This option will let us have the same amount of control on a mac machine as we do on a windows machine. 2) Add an overload to ComAutomationFactory.CreateObject() that calls the “Tell Application” command under the scenes and gets a AppleScript object. This option would work extremely well for Office automation. For any other operating system feature, you’ll have to code OS access twice.  I did not quite understand it. Has any tried this ?

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  • How to write a generic USB Host Driver for Printers from various vendors?

    - by Ullas
    I want to develop a USB host on an embedded device that will talk to printers from various vendors. Drivers for the vendor specific printers would be available on PC which is ultimately communicating with printer but my device is facilitating this communication and needs to perform the basic handshaking/setup of the printer (i.e, it needs to know when the printer is connected, what are the socket IDs that needs to be opened for CTRL and DATA transmissions etc). All of these printers are supposed to comply with IEEE 1284.4 standards but I see that many of them vary quiet a bit. One approach I have is to take the USB traces of handshaking from each of these printers and write various sections of code respectively (I know, that sounds ridiculous!). Is there a generic way to do this? Is there any available forum where these standard informations are mentioned? For eg: EPSON uses 'EPSON-CTRL' and 'EPSON-DATA' for its control and data services which needs to be provided to get the socket ID for these services. I am pretty sure HPs, Canon's etc would have their own service names as well. As per the standards, this was supposed to be captured in IANA but I dont see anything there. Any help on this would be greatly appreciated. Thanks and regards, Ullas

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  • Cannot boot from LiveUSB: “aufs mount failed”

    - by Keyslinger
    I used Universal USB Installer to install an Ubuntu 10.04 Netbook LiveCD image on an SD Card. During this installation, I indicated that I wanted a persistent install with 4GB dedicated to customization/settings. The installation seems to finish without incident. However, when I try to boot from the SD card using my EeePC 901, Ubuntu fails to start I get the following message: (initramfs) mount: mounting aufs on /root failed: No such device. Aufs mount failed What can I do to make my installation successfully boot?

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  • Auto-select external soundcard?

    - by dandelion
    Just got an external usb sound card because my internal speakers broke. The new sound card works just fine after plugging it in and going to System Settings Sound, and then selecting the device. However, I was curious as to whether there was a way to make ubuntu auto-select the device without having to go through System Settings. Can it just be selected upon plugging it in? Any and all help appreciated :)) (ps its running 12.04)

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  • Can't mount UBS flash drives or my CD/DVD drives

    - by Bret Workman
    How can I fix the permissions to get rid of the following error and mount my USB and internal CD/DVD drive: Adding read ACL for uid 1000 to `/media/bret' failed: Operation not supported These drives worked fin in 12.04, but I apparently now don't have permissions to mount these drives in 12.10. I tried chmod in Terminal, but I couldn't enter as the superuser, so I seem to be stuck. Please help! Thanks

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  • Live CD has black screen HP DV6

    - by Shaun Killingbeck
    Attempting to install/try ubuntu (11.10, 12.04) on my new laptop, using a liveCD (and tried USB). I get the purple screen (with the man/keyboard at the bottom) and after that the screen flashes bright white before going black. Ubuntu continues to load in the background, with login sound etc but the screen is off. I have tried as many different solutions as I could find including: using nomodestep, xforcevesa, i915.modeset=0, and also now i915.modeset=1 in boot options (seperately): varying consequences, but either I end up at a blinking cursor with no prompt, a command line (startx fails: no screen found), or the original blank screen again Tried booting from VirtualBox - it crashes at the same place the screen would go blank when using a CD/USB tried 11.04: I don't have this problem BUT when trying to install, I get a ubi-partman error 141 (possibly down to the three partitions that came on my laptop... not sure why HP needed there own separate partition for HP Tools...) Model: HP Pavillion DV6 6B08SA Processor: AMD Quad-Core A6-3410MX APU with Radeon HD 6545G2 Dual Graphics (1.6 GHZ 4 MB L2 cache ) Chipset: AMD RS880M Any help would be greatly appreciated. I just want to be able to partition the drive and install Ubuntu. I'm assuming the issue is graphics card related, although I have no confirmation of that. Update: Tried the ?orkarounds on https://wiki.ubuntu.com/X/Troubleshooting/BlankScreen - set gfxpayload=text changed nothing, removing splash did nothing and setting vesafb.nonsense=1 did nothing either. I'd like to be able to collect some log information somehow, but I can't get to a command line from the liveCD. tried using the latest 12.04 beta, same issue tried nomodeset without splash or quiet. get the following (tail of) output before it freezes on that screen: * Starting configure network device security [OK] * Starting configure network device [OK] [ 25.720899] ieee80211 phy0: w1_ops_config: change monitor mode: false (implement) [ 25.720923] ieee80211 phy0: w1_ops_config: change power-save mode: false (implement) * Starting restore sound card(s') mixer state(s) [fail] [ 25.721849] ieee80211 phy0: w1_ops_bss_info_changed: qos enabled: false (implement) * Stopping save kernel messages [OK] * Starting bluetooth [OK] * PulseAudio configured for per-user sessions saned disabled; edit /etc/default/saned [ 25.988016] hci_cmd_timer: hci0 command tx timeout [ 26.207225] bad LUN (0:1) [ 26.223735] bad target number (1:0) [ 26.252111] bad target number (2:0) [ 26.272170] bad target number (3:0) [ 26.300154] bad target number (4:0) [ 26.328162] bad target number (5:0) [ 26.344180] bad target number (6:0) [ 26.368142] bad target number (7:0) * Checking battery state... [OK] * Stopping System V runlevel capability [OK] Does this give any indication of the problem? the false (implement) messages also reappear when I press the power button to ask it to shutdown, followed by a [fail] status for killing remaining processes.

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  • How to troubleshoot and tweek unreasonably slow wireless connection on Ubuntu?

    - by Leonid
    I've just acquired a USB F5D8053ed Belkin adapter and it is unreasonably slow. Details of how I installed the firmware and device driver is described in this AU Question. I believe there is either a problem with a driver or adapter itself that is preventing from using the full network quality. At the moment I can see that the my Windows laptop is perfroming at 30 x speed better than the Ubuntu desktop PC with Belkin. What are they ways to troubleshoot pure wireless network performance on Ubuntu?

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  • System low graphic error,asking for some command to fix it

    - by mantra
    While running Ubuntu 12.04 amd64 from USB in safe mode it shows an error that says the system system running in low graphics mode. When I click to reconfigure low graphics mode it prompts: ubuntu@ubuntu: It asks for some command. What should I do? I am a complete beginner on the Linux platform. Should I install it without fixing the graphics, or should I solve the graphics problem before installing?

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  • Upgrade to 11.10 caused rt2800usb module to be blacklisted

    - by Shevek
    I just upgraded from Kubuntu 11.04 to 11.10, and I noticed that after the upgrade my USB wireless card was no longer recognized. It turns out that the rt2800usb module had been added (automatically, I assume, unless previously the module had been loading despite being blacklisted) to /etc/modprobe.d/blacklist.conf. I re-enabled the wireless card by commenting out the blacklist line and adding rt2800usb to /etc/modules, but I was wondering if there was a reason for rt2800usb being added to the blacklist.

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  • Is that possible to natively boot Ubuntu Touch on a PC, especially on a Surface Pro?

    - by Jules P.
    I know the question has already been asked, but the link for the instructions in the answer is outdated and the proof of concept video doesn't match with what I'm looking for. I've got a Surface Pro (1st model), I've already ran Ubuntu and Android on it several times with UnetBootin, so the question is : Is there a way to natively run Ubuntu Touch (By natively I mean by directly booting it, even on a USB key, but no emulation, no virtualization) on such a device ?

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  • How can I get my HID device working in VirtualBox?

    - by Andy E
    I'm running the latest official Ubuntu build of VirtualBox (4.1.12), with Windows 8 running as the guest OS. I have a Windows app that works with a card reading HID device, but it's not detected by the guest OS at all. I've installed the USB extensions, guest additions and set my udev rules accordingly (my own linux app is able to access the device), but no joy. Does anyone know how to get this working?

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  • Why am I getting such slow file transfer performance?

    - by kingdango
    Copying 4GB from a USB flash drive to my Linux partition. The flash drive is NTFS formatted (I believe, it's Windows formatted). The transfer is incredibly slow and blocks the computer frequently causing lag and hanging applications. My transfer rate is 1.2 MB/sec and that is the max it has hit when I let the File Operations window have focus. Why is this so slow under Ubuntu and significantly faster in Win 7?

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  • Ubuntu not being displayed in the windows boot manager

    - by Anmol
    I download an iso file and installed Ubuntu 12.04 from a USB , i had windows -7 installed already on C drive , i installed ubuntu on E drive (sda5) , after the installation completed , it asked to restart , then i restarted , but the machine automatically loads windows-7 , ubuntu doesn't show up , help me out please ! Okk , my machine doesn't support CD's , so can i do this boot repair without any Live CD !

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  • How to run sunspots?

    - by user111317
    I am trying to use SUN Spots with Ubuntu, but for some reason the SUN Spot Manager app is not seeing connected spot on USB port. Possibility that cdc_acm driver is not installed has been mentioned elsewhere, but I am complete beginner when it comes to Ubuntu, so I don't know where to find it or how to install it. Any input on this matter would be more than welcome. Addition: ls /dev/tty* returned the list that contains /dev/ttyACM0, but SUN spot is still not recognizing it.

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  • UBS drive on Ubuntu on VM Virtualbox

    - by Raama
    OSX is my host OS I have windows xp and Ubuntu 10.10 on guest OS. They both work great. When I eject USB flash drive from host OS, it appears in windows guest OS but it does not appear in Ubuntu Guest OS. I never run both guest OS at the same time. its always either or. I am running, VM virtualbox 4.1.10 and installed latest guest additions and also installed VM virtualbox extension pack. Thanks for your help

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  • How does a hard drive compare to Flash memory working as a hard drive in terms of speed?

    - by Jian Lin
    Some experiment I did with hard drive read/write speed was 10MB/s write and 40MB/s read, and with a USB Flash drive, it can be 5MB/s write and 10MB/s read. Also, if I put a virtual hard drive .vhd file in a hard drive or in a USB Flash drive and try a Virtual Machine using it, the one using the hard drive is quite fast, while the one using the USB Flash drive is close to not usable. So I wonder some early netbooks use 4GB or 8GB flash memory as the hard drive, and even the Apple Mac Air has an option of using flash memory instead of a hard drive. But in those situation, will the speed be slower than using a hard drive, like in the case of a USB Flash drive?

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  • Using "offline files sync" to sync with a local resource [closed]

    - by Kije
    Possible Duplicate: Which is the best application to Sync two folders? I have been trying get my machine (XP-Pro SP3) to sync files to a local USB drive in the same way as I can with mapped network drives. I particularly want to the sync to happen automatically when the USB is connected - in the same way that Off-line files will sync when the network drive comes on line. I can get a folder on the USB mounted as a network drive, but cannot get XP to offer the off-line files functionality. I have tried MS's SyncToy - it works as advertised, and will do scheduled and ad-hoc sync's, but does not seem to offer automatic syncs. I suspect I could do this by plugging my USB into another machine on my network - but that seems heavy handed. All insight appreciated - If you know this cannot be done please say so.

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  • TP-Link storage server accessing from Mac OS

    - by coure2011
    I have a storage/print server by TP-Link http://www.tp-link.com/en/products/details/?categoryid=232&model=TL-PS310U I just connect usb-storage to the print server and on windows I can access that usb-device from my windows computers. But how can I access that device from Mac? I found an article that I can add usb printer to mac using that device but not able to find how to access the storage device. please help me out!

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  • Is there any USB2.0 data transfer chunk size limit?

    - by goldenmean
    With one read() or write() at a time, can we increase the bulk data size over USB interface? For example, I want to transfer chunk of 1024 (1K) bytes data and if the device has limitations of only 64bytes, is there any way I can increase the packet size for read() and write() system call over USB? Is there any limitation on size of data transfer over USB in a host-device environment?

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  • Can see partial encrypted in XP but not in windows 7

    - by RN09
    I used truecrypted V.6.3a to partially encrypted (5gb) on my 16gb usb flashdrive on my XP netbook and eveything was fine. However, I don't see the ecrypted partial (5gb) when stick the usb into windows 7-32 bits (desktop). Tried to re-encrypted the usb on windows 7 (desktop) but results are the same. No problem seeing it on XP but windows 7. Thanks

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  • Standalone tool to synchronize two folders in windows?

    - by Jim
    I keep data on a USB drive, but I also keep a copy of all of that data on a hard disk. I like using the hard disk because it's faster and gives me a backup. What standalone tools would work to keep the files on the disk and USB drive in sync? I'd like a single command line executable or standalone GUI app that can do the job--something I could run off of the USB drive. So, things like the MS Sync Tool wouldn't work.

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  • What is the solution to enable Dymo Turbo 400 Label Printer to work on Win 7 / 64-bit?

    - by mdpc
    It's Christmas time and time for printing labels for all those Christmas cards. I've upgraded to Windows 7 64-bit from XP. I've been unsuccessfully attempting to get the connected Dymo 400 Turbo label USB printer to work again. The latest manufacturer drivers have been successfully loaded and installed. The drivers are supposed to work on Windows 7/64-bit. The Win 7 system(s) in question are patched and up-to-date on that score. The Windows Update site responds with a driver when the USB cable is connected to this printer. The printer queue seems to be established correctly. What happens is that I submit a job to the printer (either using the DYMO s/w or not), it delays for a period of time, and then I get the message 'printing error'. Can't seem to locate the appropriate error in the new and improved event log. Several combinations of rebooting, re-installation and power cycling components fail to make the printer work. Sometimes during some type of reset it spits out the last thing to be submitted, but that seems intermittent. I have tried different USB cables and different USB (2.X) ports as well. I have run the Windows 7 troubleshooter it tries to fix the problem but alas it doesn't. Interestingly, trying the USB printer (and its associated manufacturer drivers and s/w) on another Windows 7 64-bit system has the identical failures noticed on the original system. I did not find anything on the manufacturers' site concerning this problem. The printer has no hardware problems or issues.

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  • make a folder/partition on one computer appear as a mass storage device to another?

    - by user137560
    Is there anyway to make a folder or a partition on a computer (Linux or Windows) act like a mass storage device to other computers or devices when connected with a Male-Male USB cable? For example, I have a Windows 7 computer with 2 partitions, C and D. I would then connect that computer to another computer or a Smart TV using a Male-Male USB cable, and the other computer or device recognizes a folder/partition on current computer as a mass storage device. Is this possible? If not, is there any USB switch that can connect an external hard drive or flash drive to both a computer and TV without the need to manually switch them? (I know about some USB switches, but they only support automatic switching with some certain types of printers, not with mass storage)

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