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• Old Fglrx Driver - AMD Radeon HD 3200 - ubuntu won't start

  - by Yohannes

  I've been using Ubuntu 12.04 64 bit for about 2 weeks now and I installed the latest Fglrx driver (Graphics Card- AMD HD 3200, PC- Acer Aspire 5336, 4GB RAM, 500GB Harddrive). The problem is that sometimes video's lag and play out of sync sometimes the windows take long to show up after I've clicked them etc. After looking around I found a video on Youtube by Ubuntu help guy and in the video he recommended using an older driver if you have an older graphics card, his was about 4 years old (same as mine) and he used the 11.10 catalyst driver so I decided to try it. I removed the previous installation of the driver and then installed the 11.10 driver. However, when I restarted it instead of going to the GUI it goes to a terminal like window and asks for my login. Now its pretty clear I need to remove the old driver and go back to using the latest one. The only problem is I'm not sure where I saved the latest driver and in order to connect to the Internet I need to change /etc/resolv.conf (I use a static IP). So what should I do? Also anyone from personal experience, what propitiatory driver works best with my graphics card? As in the version. Thanks

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• How to register a function in a driver code as its ISR

  - by CVS-2600Hertz-wordpress-com

  Following the feedback i got from: http://stackoverflow.com/questions/2683682/new-to-linux-kernel-driver-development/2683819 I have written a driver (.c file) by comparing it with an existing driver and "borrowing" heavily from its code. The driver is registered fine and init() and probe() are working fine. I am also able to access the peripheral device registers. :-) However i am a bit hazy about the IRQ/ISR. The peripheral-device is a input device and raises an interrupt on a GPIO pin. How do i move ahead from my current state ( init(), probe(), etc. ) to be able to handle the IRQ and execute my ISR function?? Many-Thanks in Advance

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• When to best implement a I2C driver module in Linux

  - by stefangachter

  I am currently dealing with two devices connected to the I2C bus within an embedded system running Linux. I am using an exisiting driver for the first device, a camera. For the second device, I have successfully implemented a userspace program with which I can communicate with the second device. So far, both devices seem to coexist happily. However, almost all I2C devices have their own driver module. Thus, I am wondering what the advantages of a driver module are. I had a look at the following thread... http://stackoverflow.com/questions/149032/when-should-i-write-a-linux-kernel-module ... but without conclusion. Thus, what would be the advantage of writing a I2C driver module over a userspace implementation? Regards, Stefan

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• What is Jdbc type 5 driver

  - by Ranjith

  What is Jdbc type 5 driver ? What are all the benfits of type 5 driver ? Can I get any links/tutorials abt type 5 driver? Thanks, Ranjith

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• Canceling a WSK I/O operation when driver is unloading

  - by eaducac

  I've been learning how to write drivers with the Windows DDK recently. After creating a few test drivers experimenting with system threads and synchronization, I decided to step it up a notch and write a driver that actually does something, albeit something useless. Currently, my driver connects to my other computer using Winsock Kernel and just loops and echoes back whatever I send to it until it gets the command "exit", which causes it to break out of the loop. In my loop, after I call WskReceive() to get some data from the other computer, I use KeWaitForMultipleObjects() to wait for either of two SynchronizationEvents. BlockEvent gets set by my IRP's CompletionRoutine() to let my thread know that it's received some data from the socket. EndEvent gets set by my DriverUnload() routine to tell the thread that it's being unloaded and it needs to terminate. When I send the "exit" command, the thread terminates with no problems, and I can safely unload the driver afterward. If I try to stop the driver while it's still waiting on data from the other computer, however, it blue screens with the error DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS. After I get the EndEvent but before I exit the loop, I've tried canceling the IRP with IoCancelIrp() and completing it with IoCompleteRequest(), but both of those give me DRIVER_IRQL_NOT_LESS_OR_EQUAL errors. I then tried calling WskDisconnect(), hoping that would cause the receive operation to complete, but that took me back to the CANCELLING_PENDING_OPERATIONS error. How do I cancel my pending I/O operation from my WSK socket at the IRQL I'm running at when the driver is unloaded?

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• Install driver by using C++

  - by user296359

  Hi, This is a question about installing driver. I have the following files : aaa.cat aaa.inf x86\ttt.sys I can install this driver by clicking "update driver" in device manager. But now I need to install this driver on Windows (XP, Vista and Win7) by using C++. How could I do this? On the other hand, I can't use install shield or other tool to do the job. That is why I am asking this question. Thanks in advance. I have found this page, which mentioned SetupInstallFile and SetupInstallFileEx functions. Is this the answer? http://msdn.microsoft.com/en-us/library/aa376958%28VS.85%29.aspx

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• NVIDIA graphics driver in Ubuntu 12.04

  - by user924501

  So my overall goal is that I want to be able to code with CUDA enabled applications. However, upon many days of searching, using installation walkthroughs, and reinstalling countless times after driver failure... I'm now here as a last resort. I cannot get Ubuntu 12.04 LTS to install the NVIDIA 295.59 driver for my GeForce GT 540M NVIDIA graphics card. My main system specs is as follows... (I believe having the Intel processor may be the problem) DELL Laptop XPS L502X Intel® Core™ i7-2620M CPU @ 2.70GHz × 4 Intel Integrated Graphics 64 bit NVIDIA GeForce GT 540M Ubuntu 12.04 LTS All other specs are irrelevant unless I forgot something? Methods Tried: aptitude install nvidia-current (all packages) Results: Nothing really happened. Nothing in the additional drivers menu appeared, nor was the NVIDIA X Server settings application allowing access because it thought there was no NVIDIA X Server installed. Downloaded driver from nvidia.com. Set nomodeset in the grub boot menu through /boot/grub/grub.cfg Went to console and turned off lightdm. Installed the driver, but it said the pre-install failed? (mean anything?) Started up lightdm again. Results: NVIDIA X Server settings still didn't notice it. Even tried to do nvidia-xconfig multiple times. I also went into the config file to make sure the driver setting said "nvidia". aptitude install nvidia-173 (all packages) Results: Couldn't find the xorg-video-abi-10 virtual package. It was nowhere to be found and the ubuntu forums everywhere had no answers. Lots of people were having this problem. This is easily done in windows, simply download the driver and debug in visual studio with no problems at all. I'd like clear step-by-step instructions on how I should go about this. I'm relatively new to linux but I can find my way around pretty well so you aren't talking to a straight-up beginner. Also, if you think another thread may have the answer please post because I was having a hard time looking for my specific type of problem. TL;DR I want to have access to my GPU so I can code with CUDA while in Ubuntu 12.04 on my 64 bit laptop that also has Intel integrated graphics on the processor. Solution: sudo apt-add-repository ppa:ubuntu-x-swat/x-updates && sudo apt-get update && sudo apt-get upgrade && sudo apt-get install nvidia-current

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• Atheros LAN card driver, Linux compiling problem

  - by Ali Qocayev

  I have installed openSUSE 11.4 to my new workstation. It says that there is Attansic ETHERNET controller on board. But no devices seen. I typed: lspci and it returned: atheros communications device 1083. I have downloaded drivers. I'm trying to compile the driver. But I get the error: **Makefile:94: Linux kernel source not configured - missing autoconf.h. Stop** But I see autoconf.h presents on my system. What should I do ?

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• com0com silent install (test signed com0com.sys shows up as signed in explorer but not in Device Manager)

  - by Andrew

  My goal is to have the com0com serial driver install without popping up the install wizard on both WinXP and Win2000. I am working on WinXP x86. I have followed the test signing instructions for the com0com driver, replacing amd64 with i386 at line 60. I have added my test certificate as both a root and trustedprovider using the following commands: certmgr /add com0com.cer /r localMachine root certmgr /add com0com.cer /r localMachine trustedprovider And verified that it is listed under both locations. I then run the newly built setup.exe. This installs the signed com0com.sys file into C:\WINDOWS\system32\DRIVERS and sets up a pair of virtual serial ports and a bus between them. Using explorer, I go to the DRIVERS directory, right click on the com0com.sys file and verify that it has the "test" digital signature. I then go into Device Manager, open the "com0com serial port emulators" entry, pick an entry and do Properties-Driver and see that it says "Not digitally signed". I click details for the driver and can see that it is referring to the com0com.sys driver file that I just confirmed is signed. I found what might be a related issue but I'm not sure. Does WinXP demand a WHQL signature? If so, does that explain why the com0com.sys file is signed but the device driver entries say they aren't signed?

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• OpenSolaris / Nexenta problems with NetXen 4-port NIC card (ntxn driver)

  - by ewwhite

  Hello, I'm running NexentaStor Enterprise on an HP ProLiant DL180 G6 server. The onboard NIC interfaces surface as igb0 and igb1 and work well. However, I've added an HP NC375T 4-port network card using the NetXen 3031 chipset. This card should be handled by the ntxn driver in the SUNWntxn package, but that results in "ntxn0: failed to map doorbell" messages upon boot. The network interfaces don't show up. After some research, I found HP's driver package for the card. The release notes for the driver package state: This version of the Driver is supported only on Oracle Solaris 10 5/09 & 10/09. Oracle Solaris 10 5/09 & 10/09 contain an older version of NetXen P3 driver package called SUNWntxn. So, adding another version of NetXen P3 driver package using pkgadd command might result in conflicts with the NetXen driver binary & related files. Users are advised to uninstall native SUNWntxn driver package before installing the new package. The install completes, but I end up with a different set of errors in initializing the card. ifconfig ntxn0 plumb ifconfig: cannot open link "ntxn0": DLPI link does not exist dmesg output: Jan 29 07:20:17 ch-san2 ntxn: [ID 977263 kern.warning] WARNING: Memory not available Jan 29 07:20:17 ch-san2 ntxn: [ID 404858 kern.notice] NOTICE: ntxn0: Mac registration error Trying to manually create the device files: root@ch-san2:/volumes# add_drv -i "4040,100" ntxn ("ntxn") already in use as a driver or alias. Update the driver: root@ch-san2:/volumes# update_drv -f ntxn devfsadm: driver failed to attach: ntxn Warning: Driver (ntxn) successfully added to system but failed to attach Any ideas on how to get this driver working, or should I ditch the card and go with an Intel or something else?

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• Disable or remove filter driver for single HID device

  - by snoopen

  Running Windows XP in a corporate setting here. I have an issue where a filter driver is interfering with the functionality of different USB HIDs. For example graphics tablets do not respond while the filter driver is in place. I've also had the issue with foot pedals used with transcription software. My question is really two fold: A) what makes Windows use a filter driver on one HID but not another? B) when a filter driver is causing conflicts how can I disable it on the affected devices? Background I've previously narrowed down the issue to the filter driver by uninstalling the software (Funk Proxy Host) responsible for the filter driver. The software is a type of RDP we use here at work. (I might have even booted into safe mode and renamed the file, I forget). I believe the filter driver is present to disable or modify the use of the local keyboard and mouse while admin staff are assisting users. Either way I don't have the authority to just go uninstalling this software. As far as I can tell the software versions are the same, however I'm not sure if the device driver definitions are all the same as I don't know where these things would be located. To check for the presence of the filter driver I locate the hardware device in Device Manager, click Properties Driver tab Driver Details.... It shows up as ph32ihid.sys. Even though all machines are meant to have the same SOE and do have Funk Proxy Host installed I don't always have issues with the same HIDs. A few machines here the foot pedals without any issues. I've not had any machines work with the graphics tablet without uninstalling Funk software. Driver details I've just read up a bit more about filter drivers and found the drivers description in the registry under "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ProxyHostHIDFilter" There it's called "Kernel-mode HID filter driver for the Proxy Host". Presumably I could also disable it here but that would be system wide which is probably not desirable?

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• WinUSB application or User-Mode Driver as a filter driver for USB Analysis/Sniffer/Trending

  - by Robert

  A question to maybe some who have worked extensively with WinUSB APIs or use mode USB drivers - Does anyone know if the WinUSB API or a user mode driver can be used as a passive observer of USB connections, capturing notification of interrupts, control requests, data transfers...etc without interfering with other applications (such as iTunes) which would obviously require concurrent access to the device at the same time my application is monitoring the connection and displaying data on it? Or do you pretty much have to write a kernel-mode filter driver and inject yourself in the USB stack in order to make that happen? In the past, there have been a few credible options (libusb-win32 and usbsnoop to be specific) though both are built around the old DDK, not the Windows Driver Foundation, and are not really supported on a regular basis any more. I'm hesitant to build something significant around them, as a result.

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• Ubuntu 12.10 - Graphics driver shows Gallium 0.4 instead of intel HD

  - by nlooije

  I have a hybrid Intel/Nvidia system using bumblebee on Ubuntu 12.10 with specs: Clevo W150HR, SB i7-2720qm, 8GB RAM, 128GB Crucial M4 SSD + 500GB HDD It is reported to use software rendering (through Gallium driver) rather than accelerated through the intel HD driver. Reinstalling the intel driver has no effect: sudo apt-get install --reinstall xserver-xorg-video-intel The result is a rather sluggish desktop. Is there any way to blacklist the gallium driver? Or force the intel driver instead? Edit 1 - Ubuntu 12.04 shows the driver as Intel SandyBridge out of the box, but 12.10 does not even after running the above command. Edit 2 - Xorg.0.log shows: (--) intel(0): Integrated Graphics Chipset: Intel(R) Sandybridge Mobile (GT1) (WW) intel(0): Disabling hardware acceleration on this pre-production hardware. Edit 3 - It turns out that SandyBridge rev.7 systems are known to be unstable per this link. Accordingly in the xserver-xorg-video-intel if it detects this rev. it disables it with the warning in above log.

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• Display Driver Issue on an hp TX2-1160ea Notebook

  - by Sam

  I'm new to Linux and recently switched to Ubuntu 11.04 due to my project requirement. My laptop has been freezing and going to black screen of death when I run anything related to display (Share desktop, stream video, etc). Today I went through the Ubuntu forum to install the appropriate graphic driver and, after doing it, I rebooted my PC. It gave an error before login saying "select the recovery mode" and after clicking OK, it didn't give the same error on reboot but I've lost the 11.04 graphical interface and all I see is the interface of Ubuntu v10 with slow visuals (even scrolling up/down on browser is really slow). For the reference, here's a desktop screenshot so that you can understand the situation. Also the laptop is overheating. How can I fix this problem? How can i get the Ubuntu 11.04 view back? I also tried Google, but couldn't find any issue like this. Some general Information: Laptop: HP TouchSmart TX2-1160ea Processor: AMD Turion TX2 Memory: 4GB OS: Ubuntu 11.04 Some debugging information:: $ report-hw | grep controller lspci -knn: 00:11.0 SATA controller [0106]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] [1002:4391] lspci -knn: 00:14.3 ISA bridge [0601]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 LPC host controller [1002:439d] lspci -knn: 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS780M/RS780MN [Radeon HD 3200 Graphics] [1002:9612] lspci -knn: 08:00.0 Network controller [0280]: Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b] (rev 01) lspci -knn: 09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 02) And: $ dpkg -l '*fglrx*' Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description +++-==============-==============-============================================ ii fglrx 2:8.840-0ubunt Video driver for the ATI graphics accelerato ii fglrx-amdcccle 2:8.840-0ubunt Catalyst Control Center for the ATI graphics un fglrx-control <none> (no description available) un fglrx-control- <none> (no description available) ii fglrx-dev 2:8.840-0ubunt Video driver for the ATI graphics accelerato un fglrx-driver <none> (no description available) un fglrx-driver-d <none> (no description available) un fglrx-kernel-s <none> (no description available) un fglrx-modalias <none> (no description available) un xfree86-driver <none> (no description available) un xfree86-driver <none> (no description available) un xorg-driver-fg <none> (no description available) un xorg-driver-fg <none> (no description available) If you need any more information that could help, just ask.

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• Install AMDCONFIG on Ubuntu driver

  - by Nick Bailuc

  In 12.04 I used the official driver downloaded from amd.com which came with amdconfig but now in 14.04 the official driver is buggy so I just use the Ubuntu Official Drivers which works even better because they beefed up the original driver. The Ubuntu driver doesnt come with the terminal command amdconfig which allowed me to tweak/overclock my graphics card. How can I install it without having to install the original AMD driver? Additional Information: -I only use x.org drivers becuase it's opensource therefore more stable rather than the proprietary fglrx driver -I do not use procrams like amdoverdrivectrl or atioverclock because they are not as stable and advanced as the terminal command

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• Which ATI driver version did 10.04 use?

  - by Jack

  I have a trouble with ATI driver with Ubuntu 12.04 LTS. When I install ATI driver in Ubuntu 12.04 via "Additional Driver", then I can't shutdown Ubuntu, it showed blank (black) screen and my laptop still run. Sometimes, my screen like that: http://www.youtube.com/watch?v=U9_iygesbBM But when I install Ubuntu 10.04 and install ATI driver via "Additional Driver", it's very good and no trouble I've seen. It's sweet but 10.04 is old and is supported to 4/2013. So I want to know why Ubuntu 10.04 works good better than 12.04 with ATI driver (in my case)?

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• Which ATI driver version Ubuntu 10.04 LTS used?

  - by Jack

  I have a trouble with ATI driver with Ubuntu 12.04 LTS. When I install ATI driver in Ubuntu 12.04 via "Additional Driver", then I can't shutdown Ubuntu, it showed blank (black) screen and my laptop still run. Sometimes, my screen like that: http://www.youtube.com/watch?v=U9_iygesbBM But when I install Ubuntu 10.04 and install ATI driver via "Additional Driver", it's very good and no trouble I've seen. It's sweet but 10.04 is old and is supported to 4/2013. So I want to know why Ubuntu 10.04 works good better than 12.04 with ATI driver (in my case)?

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• ODBC driver (AcuODBC, MS Access Driver)

  - by Maverick-F14

  hi i've developed a java descktop application (in Windows 7) that use ms access and cobol db... to use that db i've two odbc sources data that are: *Microsoft Access Driver ODBC (for my .mdb file) **AcuODBC (for cobol db). Now i've canged pc and in my ODBC manager i don't have the driver to create a data sources. (my new OS is Win7 X64) Can you tell me where can i download the 2 drivers? Thx you ALL

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• How can I find which drivers are the correct ones for my machine?

  - by tombull89

  I'm currently installing Windows 7 onto a new laptop before imaging it to deploy. I need to install the Wireless and Graphics drivers, but the HP site is offering me both ATI and Intel graphics drivers (at 102MB and 470(!)MB) a pop, as well as Intel, Broadcomm, RealTek and Atheros wireless drivers. Is there a bit of software that will tell me what devices are in the machine so I don't have to go through, trial-and-error and find which is the right driver for the hardware?

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• Driver denied access to PCI card

  - by Corin

  We wrote a Windows device driver to access our custom PCI card. The driver uses CreateFile to get a handle to the card. We recently had trouble at one installation were the card appeared to stop working. We tried replacing the card (the replacement appeared not work either). The computer vendor replaced the motherboard and both cards still failed to work. We put the cards in a different computer and both worked fine. We now have the computer at our office for examination. The Windows Device Manager lists our card in Other Devices as usual and says it's working fine. However, our driver initialization fails when it attempts to connect to the card. We created a test version of our driver with some extra debugging and determined that CreateFile is failing. It returns INVALID_HANDLE_VALUE as it is supposed to on failure. GetLastError indicates the error is Access is Denied. Since we're logged into the system as a local administrator, what can deny access to the device?

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• Virtual audio driver (microphone)

  - by Dalamber

  Hello guys, I want to develop a virtual microphone driver. Please, do not say anything about DirectShow - that's not "the way". I need a solution that will work with any software including Skype and MSN. And DirectShow doesn't fit these requirements. I found AVStream Filter-Centric Simulated Capture Driver (avssamp.sys) in Windows 7 WDK. What I need is an audio part of it. By default it reads avssamp.wav and plays it. But this driver is registered as WDM streaming capture device. And I want it in Audio Capture Device. There are some posts in the web but they are all the same: http://www.tech-archive.net/Archive/Development/microsoft.public.development.device.drivers/2005-05/msg00124.html http://www.winvistatips.com/problem-installing-avssamp-audio-capture-sources-category-t184898.html I think registering this filter-driver as audio capture device will make Skype recognize it as a microphone and thefore I will be able to push any PCM file as if it goes from mic. If someone already faced this problem before, please help. Thanks in advance.

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• Unity desktop "smears" (doesn't refresh) and shows no wallpaper

  - by Cedric Reichenbach

  Since a couple of days now, my unity desktop background smears everything, just like what old Windows versions were famous for: Of course, I tried rebooting a couple of times. Also, I switched graphics driver and I tried to change wallpaper and theme, but none of them solved the problem. What could be causing that problem, and where can I search on for its source? Infomation update I'm using Ubuntu 13.04 (not updated to 13.10 yet). The following command were all run from cinnamon (on the same Ubuntu installation). sudo lsb_release -a: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 13.04 Release: 13.04 Codename: raring sudo uname -a: Linux cedric-MacBookPro 3.8.0-32-generic #47-Ubuntu SMP Tue Oct 1 22:35:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux sudo dpkg -l | grep xserver-xorg-video: ii xserver-xorg-video-all 1:7.7+1ubuntu4 amd64 X.Org X server -- output driver metapackage ii xserver-xorg-video-ati 1:7.1.0-0ubuntu2 amd64 X.Org X server -- AMD/ATI display driver wrapper ii xserver-xorg-video-cirrus 1:1.5.2-0ubuntu1 amd64 X.Org X server -- Cirrus display driver ii xserver-xorg-video-fbdev 1:0.4.3-0ubuntu1 amd64 X.Org X server -- fbdev display driver ii xserver-xorg-video-intel 2:2.21.6-0ubuntu4.3 amd64 X.Org X server -- Intel i8xx, i9xx display driver ii xserver-xorg-video-mach64 6.9.3-0ubuntu1 amd64 X.Org X server -- ATI Mach64 display driver ii xserver-xorg-video-mga 1:1.6.2-0ubuntu1 amd64 X.Org X server -- MGA display driver ii xserver-xorg-video-modesetting 0.7.0-0ubuntu2 amd64 X.Org X server -- Generic modesetting driver ii xserver-xorg-video-neomagic 1:1.2.7-0ubuntu1 amd64 X.Org X server -- Neomagic display driver ii xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 amd64 X.Org X server -- Nouveau display driver ii xserver-xorg-video-openchrome 1:0.3.1-0ubuntu1.13.04.1 amd64 X.Org X server -- VIA display driver ii xserver-xorg-video-qxl 0.1.0-0ubuntu3 amd64 X.Org X server -- QXL display driver ii xserver-xorg-video-r128 6.9.1-0ubuntu1 amd64 X.Org X server -- ATI r128 display driver ii xserver-xorg-video-radeon 1:7.1.0-0ubuntu2 amd64 X.Org X server -- AMD/ATI Radeon display driver ii xserver-xorg-video-s3 1:0.6.5-0ubuntu3 amd64 X.Org X server -- legacy S3 display driver ii xserver-xorg-video-savage 1:2.3.6-0ubuntu1 amd64 X.Org X server -- Savage display driver ii xserver-xorg-video-siliconmotion 1:1.7.7-0ubuntu1 amd64 X.Org X server -- SiliconMotion display driver ii xserver-xorg-video-sis 1:0.10.7-0ubuntu1 amd64 X.Org X server -- SiS display driver ii xserver-xorg-video-sisusb 1:0.9.6-0ubuntu1 amd64 X.Org X server -- SiS USB display driver ii xserver-xorg-video-tdfx 1:1.4.5-0ubuntu1 amd64 X.Org X server -- tdfx display driver ii xserver-xorg-video-trident 1:1.3.6-0ubuntu2 amd64 X.Org X server -- Trident display driver ii xserver-xorg-video-vesa 1:2.3.2-0ubuntu1 amd64 X.Org X server -- VESA display driver ii xserver-xorg-video-vmware 1:12.0.2+git.e5ac80d8-0ubuntu1 amd64 X.Org X server -- VMware display driver sudo lspci | grep VGA: 01:00.0 VGA compatible controller: NVIDIA Corporation GT216M [GeForce GT 330M] (rev a2)

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• Is the Windows 7 default graphic driver faster than the newest NVIDIA Forceware?

  - by netvope

  Here is my Windows 7 Experience Index using the stock graphics driver: And after installing the newest driver Forceware 197.45, it becomes: The only change is that the "Gaming graphics" subscore drops from 6.4 to 5.2. Is the stock graphic driver more optimized for Windows 7? Or is Forceware 197.45 buggy? Should I revert back to the stock driver? My configuration: Athlon 64 X2 5000+ Asus M2A-VM (AMD 690G, SB600) 6 GB DDR2-800 RAM (only 3.25 GB usable under Windows) GeForce 8600 GT (256 MB) Windows 7 Ultimate 32-bit

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• Device Driver IRQL and Thread/Context Switches

  - by Christian Hoglund

  Hi, I'm new to Windows device driver programming. I know that certain operations can only be performed at IRQL PASSIVE_LEVEL. For example, Microsoft have this sample code of how to write to a file from a kernel driver: if (KeGetCurrentIrql() != PASSIVE_LEVEL) return STATUS_INVALID_DEVICE_STATE; Status = ZwCreateFile(...); My question is this: What is preventing the IRQL from being raised after the KeGetCurrentIrql() check above? Say a context or thread swithch occurs, couldn't the IRQL suddenly be DISPATCH_LEVEL when it gets back to my driver which would then result in a system crash? If this is NOT possible then why not just check the IRQL in the DriverEntry function and be done with it once for all?

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• Cheap windows driver signing for 64 bit Windows 7

  - by kayahr

  I need to install the libusb-win32 driver on Windows 7 64 bit machines. This driver is open source so it is not digitally signed so I want to do this my self but I wonder if this can be done WITHOUT paying lot of money. Is it possible to use a certificate which is NOT signed by Verisign or GlobalSign? Maybe self-signed or by using StartSSL instead? And if yes, how do I do it? According to this howto I have to use a "cross-certificate" (And there are only six available on the Microsoft list and most of them are for CAs which are no longer active) I don't care if the user is confronted with a warning message. I can even accept if the user has to install a special CA certificate first. I only require that the driver runs without manually disabling the signature check on each windows startup.

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