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## Corrupted screen: "Six screens" Problem

For some users, using GeForce GT 100M's, the screen gets corrupted after X starts, divided into 6 sections with a resolution limited to 640x480. The same problem has been recently reported with Quadro 2000 and hi-res displays.

To solve this problem, enable the Validation Mode `NoTotalSizeCheck` in section `Device`:

    Section "Device"
     ...
     Option "ModeValidation" "NoTotalSizeCheck"
     ...
    EndSection

## '/dev/nvidia0' input/output error

The factual accuracy of this article or section is disputed.

Reason: Verify that the BIOS related suggestions work and are not coincidentally set while troubleshooting. (Discuss in Talk:NVIDIA/Troubleshooting#'/dev/nvidia0' Input/Output error... suggested fixes)

This error can occur for several different reasons, and the most common solution given for this error is to check for group/file permissions, which in almost every case is not the problem. The NVIDIA documentation does not talk in detail on what you should do to correct this problem but there are a few things that have worked for some people. The problem can be a IRQ conflict with another device or bad routing by either the kernel or your BIOS.

First thing to try is to remove other video devices such as video capture cards and see if the problem goes away. If there are too many video processors on the same system it can lead into the kernel being unable to start them because of memory allocation problems with the video controller. In particular on systems with low video memory this can occur even if there is only one video processor. In such case you should find out the amount of your system's video memory (e.g. with `lspci -v`) and pass allocation parameters to the kernel, e.g. for a 32-bit kernel:

    vmalloc=384M

If running a 64bit kernel, a driver defect can cause the NVIDIA module to fail initializing when IOMMU is on. Turning it off in the BIOS has been confirmed to work for some users. [1]User:Clickthem#nvidia module

Another thing to try is to change your BIOS IRQ routing from `Operating system controlled` to `BIOS controlled` or the other way around. The first one can be passed as a kernel parameter:

    PCI=biosirq

The `noacpi` kernel parameter has also been suggested as a solution but since it disables ACPI completely it should be used with caution. Some hardware are easily damaged by overheating.

Note: The kernel parameters can be passed either through the kernel command line or the bootloader configuration file. See your bootloader Wiki page for more information.

## Crashing in general

- Try disabling `RenderAccel` in xorg.conf.
- If Xorg outputs an error about `"conflicting memory type"` or `"failed to allocate primary buffer: out of memory"`, or crashes with a "Signal 11" while using nvidia-96xx drivers, add `nopat` to your kernel parameters.
- If the NVIDIA compiler complains about different versions of GCC between the current one and the one used for compiling the kernel, add in `/etc/profile`:

    export IGNORE_CC_MISMATCH=1

- If fullscreen applications are freezing or crashing, try enabling `Display Compositing` and `Direct fullscreen rendering` options in your desktop environment's settings.

## Bad performance after installing a new driver version

If FPS have dropped in comparison with older drivers, check if direct rendering is enabled (`glxinfo` is included in mesa-utils):

    $ glxinfo | grep direct

If the command prints:

    direct rendering: No

A possible solution could be to regress to the previously installed driver version and rebooting afterwards.

## Avoid screen tearing

Note: This has been reported to reduce the performance of some OpenGL applications and may produce issues in WebGL. It also drastically increases the time the driver needs to clock down after load (NVIDIA Support Thread).

Tearing can be avoided by forcing a full composition pipeline, regardless of the compositor you are using. To test whether this option will work, run:

    $ nvidia-settings --assign CurrentMetaMode="nvidia-auto-select +0+0 { ForceFullCompositionPipeline = On }"

Or click on the Advanced button that is available on the X Server Display Configuration menu option. Select either Force Composition Pipeline or Force Full Composition Pipeline and click on Apply.

In order to make the change permanent, it must be added to the `"Screen"` section of the Xorg configuration file. When making this change, `TripleBuffering` should be enabled and `AllowIndirectGLXProtocol` should be disabled in the driver configuration as well. See example configuration below:

    /etc/X11/xorg.conf.d/20-nvidia.conf

    Section "Device"
            Identifier "NVIDIA Card"
            Driver     "nvidia"
            VendorName "NVIDIA Corporation"
            BoardName  "GeForce GTX 1050 Ti"
    EndSection

    Section "Screen"
        Identifier     "Screen0"
        Device         "Device0"
        Monitor        "Monitor0"
        Option         "ForceFullCompositionPipeline" "on"
        Option         "AllowIndirectGLXProtocol" "off"
        Option         "TripleBuffer" "on"
    EndSection

If you do not have an Xorg configuration file, you can create one for your present hardware using `nvidia-xconfig` (see NVIDIA#Automatic configuration) and move it from `/etc/X11/xorg.conf` to the preferred location `/etc/X11/xorg.conf.d/20-nvidia.conf`.

Note: Many of the configuration options produced in `20-nvidia.conf` by using `nvidia-xconfig` are set automatically by the driver and are not needed. To only use this file for enabling composition pipeline, only the section `"Screen"` containing lines with values for `Identifier` and `Option` are necessary. Other sections may be removed from this file.

### Multi-monitor

For multi-monitor setup you will need to specify `ForceCompositionPipeline=On` for each display. For example:

    $ nvidia-settings --assign CurrentMetaMode="DP-2: nvidia-auto-select +0+0 {ForceCompositionPipeline=On}, DP-4: nvidia-auto-select +3840+0 {ForceCompositionPipeline=On}"

Without doing this, the `nvidia-settings` command will disable your secondary display.

You can get the current screen names and offsets using `--query`:

    $ nvidia-settings --query CurrentMetaMode

The above line is for two 3840x2160 monitors connected to DP-2 and DP-4. You will need to read the correct `CurrentMetaMode` by exporting `xorg.conf` and append `ForceCompositionPipeline` to each of your displays. Setting `ForceCompositionPipeline` only affects the targeted display.

Tip: Multi monitor setups using different model monitors may have slightly different refresh rates. If vsync is enabled by the driver it will sync to only one of these refresh rates which can cause the appearance of screen tearing on incorrectly synced monitors. Select to sync the display device which is the primarily used monitor as others will not sync properly. This is configurable in `~/.nvidia-settings-rc` as `0/XVideoSyncToDisplayID=` or by installing nvidia-settings and using the graphical configuration options.

## Modprobe Error: "Could not insert 'nvidia': No such device" on linux >=4.8

With linux 4.8, one can get the following errors when trying to use the discrete card:

    $ modprobe nvidia -vv

    modprobe: INFO: custom logging function 0x409c10 registered
    modprobe: INFO: Failed to insert module '/lib/modules/4.8.6-1-ARCH/extramodules/nvidia.ko.gz': No such device
    modprobe: ERROR: could not insert 'nvidia': No such device
    modprobe: INFO: context 0x24481e0 released
    insmod /lib/modules/4.8.6-1-ARCH/extramodules/nvidia.ko.gz

    # dmesg

    ...
    NVRM: The NVIDIA GPU 0000:01:00.0 (PCI ID: 10de:139b)
    NVRM: installed in this system is not supported by the 370.28
    NVRM: NVIDIA Linux driver release.  Please see 'Appendix
    NVRM: A - Supported NVIDIA GPU Products' in this release's
    NVRM: README, available on the Linux driver download page
    NVRM: at www.nvidia.com.
    ...

This problem is caused by bad commits pertaining to PCIe power management in the Linux Kernel (as documented in this NVIDIA DevTalk thread).

The workaround is to add `pcie_port_pm=off` to your kernel parameters. Note that this disables PCIe power management for all devices.

## Screen corruption after resuming from suspend or hibernation

See NVIDIA/Tips and tricks#Preserve video memory after suspend

A corruption after suspend bug when using GDM service was solved as of driver version 515.43.04 [2].

## CPU spikes with 400 series cards

If you are experiencing intermittent CPU spikes with a 400 series card, it may be caused by PowerMizer constantly changing the GPU's clock frequency. Switching PowerMizer's setting from Adaptive to Performance, add the following to the `Device` section of your Xorg configuration:

     Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x3322; PowerMizerDefaultAC=0x1"

## Laptops: X hangs on login/out, worked around with Ctrl+Alt+Backspace

If, while using the legacy NVIDIA drivers, Xorg hangs on login and logout (particularly with an odd screen split into two black and white/gray pieces), but logging in is still possible via `Ctrl+Alt+Backspace` (or whatever the new "kill X" key binding is), try adding this in `/etc/modprobe.d/modprobe.conf`:

    options nvidia NVreg_Mobile=1

One user had luck with this instead, but it makes performance drop significantly for others:

    options nvidia NVreg_DeviceFileUID=0 NVreg_DeviceFileGID=33 NVreg_DeviceFileMode=0660 NVreg_SoftEDIDs=0 NVreg_Mobile=1

Note that `NVreg_Mobile` needs to be changed according to the laptop:

- 1 for Dell laptops.
- 2 for non-Compal Toshiba laptops.
- 3 for other laptops.
- 4 for Compal Toshiba laptops.
- 5 for Gateway laptops.

See NVIDIA Driver's README: Appendix K for more information.

## Screen(s) found, but none have a usable configuration

Sometimes NVIDIA and X have trouble finding the active screen. If your graphics card has multiple outputs try plugging your monitor into the other ones. On a laptop it may be because your graphics card has VGA/TV out. Xorg.0.log will provide more info.

Another thing to try is adding invalid `"ConnectedMonitor" Option` to `Section "Device"` to force Xorg throws error and shows you how correct it. Here more about ConnectedMonitor setting.

After re-run X see Xorg.0.log to get valid CRT-x,DFP-x,TV-x values.

`nvidia-xconfig --query-gpu-info` could be helpful.

## Blackscreen at X startup / Machine poweroff at X shutdown

If you have installed an update of NVIDIA and your screen stays black after launching Xorg, or if shutting down Xorg causes a machine poweroff, try the below workarounds:

- Prepend "xrandr --auto" to your xinitrc

- Use the `rcutree.rcu_idle_gp_delay=1` kernel parameter.

- You can also try to add the `nvidia` module directly to your mkinitcpio.conf.

- If the screen still stays black with both the `rcutree.rcu_idle_gp_delay=1` kernel parameter and the `nvidia` module directly in the mkinitcpio.conf, try re-installing nvidia and nvidia-utils in that order, and finally reload the driver:

    # modprobe nvidia

## Backlight is not turning off in some occasions

By default, DPMS should turn off backlight with the timeouts set or by running xset. However, probably due to a bug in the proprietary NVIDIA drivers the result is a blank screen with no powersaving whatsoever. To workaround it, until the bug has been fixed you can use the `vbetool` as root.

Install the vbetool package.

Turn off your screen on demand and then by pressing a random key backlight turns on again:

    vbetool dpms off && read -n1; vbetool dpms on

Alternatively, xrandr is able to disable and re-enable monitor outputs without requiring root.

    xrandr --output DP-1 --off; read -n1; xrandr --output DP-1 --auto

### Driver 415: HardDPMS

This article or section needs expansion.

Reason: Add references for the "user reports". (Discuss in Talk:NVIDIA/Troubleshooting)

Proprietary driver 415 includes a new feature called HardDPMS. This is reported by some users to solve the issues with suspending monitors connected over DisplayPort. It is reported to become the default in a future driver version, but for now, the `HardDPMS` option can be set in the `Device` or `Screen` sections. For example:

    /etc/X11/xorg.conf.d/20-nvidia.conf

    Section "Device"
        ...
        Option         "HardDPMS" "true"
        ...
    EndSection

    Section "Screen"
        ...
        Option         "HardDPMS" "true"
        ...
    EndSection

`HardDPMS` will trigger on screensaver settings like `BlankTime`. The following `ServerFlags` will set your monitor(s) to suspend after 10 minutes of inactivity:

    /etc/X11/xorg.conf.d/20-nvidia.conf

    Section "ServerFlags"
        Option     "BlankTime" "10"
    EndSection

## Xorg fails to load or Red Screen of Death

If you get a red screen and use GRUB, disable the GRUB framebuffer by editing `/etc/default/grub` and uncomment `GRUB_TERMINAL_OUTPUT=console`. For more information see GRUB/Tips and tricks#Disable framebuffer.

## Black screen on systems with integrated GPU

If you have a system with an integrated GPU (e.g. Intel HD 4000, VIA VX820 Chrome 9 or AMD Cezanne) and have installed the nvidia package, you may experience a black screen on boot, when changing virtual terminal, or when exiting an X session. This may be caused by a conflict between the graphics modules. This is solved by blacklisting the relevant GPU modules. Create the file `/etc/modprobe.d/blacklist.conf` and prevent the relevant modules from loading on boot:

    /etc/modprobe.d/blacklist.conf

    install i915 /usr/bin/false
    install intel_agp /usr/bin/false
    install viafb /usr/bin/false
    install radeon /usr/bin/false
    install amdgpu /usr/bin/false

## No audio over HDMI

Sometimes NVIDIA HDMI audio devices are not shown when you do

    $ aplay -l

On some new machines, the audio chip on the NVIDIA GPU is disabled at boot. Read more on NVIDIA's website and a forum post.

You need to reload the NVIDIA device with audio enabled. In order to do that make sure that your GPU is on (in case of laptops/Bumblebee) and that you are not running X on it, because it is going to reset:

    # setpci -s 01:00.0 0x488.l=0x2000000:0x2000000
    # rmmod nvidia-drm nvidia-modeset nvidia
    # echo 1 > /sys/bus/pci/devices/0000:01:00.0/remove
    # echo 1 > /sys/bus/pci/devices/0000:00:01.0/rescan
    # modprobe nvidia-drm
    # xinit -- -retro

If you are running your TTY on NVIDIA, put the lines in a script so you do not end up with no screen.

## X fails with "no screens found" when using Multiple GPUs

In situations where you might have multiple GPUs on a system and X fails to start with:

    [ 76.633] (EE) No devices detected.
    [ 76.633] Fatal server error:
    [ 76.633] no screens found

then you need to add your discrete card's BusID to your X configuration. This can happen on systems with an Intel CPU and an integrated GPU or if you have more than one NVIDIA card connected. Find your BusID:

    # lspci | grep -E "VGA|3D controller"

    00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09)
    01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GTX 650] (rev a1)
    08:00.0 3D controller: NVIDIA Corporation GM108GLM [Quadro K620M / Quadro M500M] (rev a2)

Then you fix it by adding it to the card's Device section in your X configuration. In my case:

    /etc/X11/xorg.conf.d/10-nvidia.conf

    Section "Device"
        Identifier     "Device0"
        Driver         "nvidia"
        VendorName     "NVIDIA Corporation"
        BusID          "PCI:1:0:0"
    EndSection

Note: BusID formatting is important!

In the example above `01:00.0` is stripped to be written as `1:0:0`, however some conversions can be more complicated. `lspci` output is in hex format, but in configuration files the BusID's are in decimal format! This means that in cases where the BusID is greater than 9 you will need to convert it to decimal!

ie: `5e:00.0` from lspci becomes `PCI:94:0:0`.

## Xorg fails during boot, but otherwise starts fine

On very fast booting systems, systemd may attempt to start the display manager before the NVIDIA driver has fully initialized. You will see a message like the following in your logs only when Xorg runs during boot.

    /var/log/Xorg.0.log

    [     1.807] (EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module. Please see the
    [     1.807] (EE) NVIDIA(0):     system's kernel log for additional error messages and
    [     1.808] (EE) NVIDIA(0):     consult the NVIDIA README for details.
    [     1.808] (EE) NVIDIA(0):  *** Aborting ***

In this case you will need to establish an ordering dependency from the display manager to the DRI device. First create device units for DRI devices by creating a new udev rules file.

    /etc/udev/rules.d/99-systemd-dri-devices.rules

    ACTION=="add", KERNEL=="card*", SUBSYSTEM=="drm", TAG+="systemd"

Then create dependencies from the display manager to the device(s).

    /etc/systemd/system/display-manager.service.d/10-wait-for-dri-devices.conf

    [Unit]
    Wants=dev-dri-card0.device
    After=dev-dri-card0.device

If you have additional cards needed for the desktop then list them in Wants and After seperated by spaces.

## xrandr BadMatch

If you are trying to configure a WQHD monitor such as DELL U2515H using xrandr and `xrandr --addmode` gives you the error `X Error of failed request: BadMatch`, it might be because the proprietary NVIDIA driver clips the pixel clock maximum frequency of HDMI output to 225 MHz or lower. To set the monitor to maximum resolution you have to install nouveau drivers. You can force nouveau to use a specific pixel clock frequency by setting `nouveau.hdmimhz=297` (or `330`) in your Kernel parameters.

Alternatively, it may be that your monitor's EDID is incorrect. See #Override EDID.

Another reason could be that by default current NVIDIA drivers will only allow modes explicitly reported by EDID, but sometimes refresh rates and/or resolutions are desired which are not reported by the monitor (although the EDID information is correct; it is just that current NVIDIA drivers are too restrictive).

If this happens, you may want to add an option to `xorg.conf` to allow non-EDID modes:

    Section "Device"
        Identifier     "Device0"
        Driver         "nvidia"
        VendorName     "NVIDIA Corporation"
    ...
        Option         "ModeValidation" "AllowNonEdidModes"
    ...
    EndSection

This can be set per-output. See NVidia driver readme (Appendix B. X Config Options) for more information.

## Override EDID

See Kernel mode setting#Forcing modes and EDID, Xrandr#Troubleshooting and Qnix QX2710#Fixing X11 with Nvidia.

## Overclocking with nvidia-settings GUI not working

This article or section needs language, wiki syntax or style improvements. See Help:Style for reference.

Reason: Duplication, vague "not working" (Discuss in Talk:NVIDIA/Troubleshooting)

Workaround is to use nvidia-settings CLI to query and set certain variables after enabling overclocking (as explained in NVIDIA/Tips and tricks#Enabling overclocking, see nvidia-settings(1) for more information).

Example to query all variables:

     nvidia-settings -q all

Example to set PowerMizerMode to prefer performance mode:

     nvidia-settings -a [gpu:0]/GPUPowerMizerMode=1

Example to set fan speed to fixed 21%:

    nvidia-settings -a [gpu:0]/GPUFanControlState=1 -a [fan:0]/GPUTargetFanSpeed=21

Example to set multiple variables at once (overclock GPU by 50MHz, overclock video memory by 50MHz, increase GPU voltage by 100mV):

     nvidia-settings -a GPUGraphicsClockOffsetAllPerformanceLevels=50 -a GPUMemoryTransferRateOffsetGPUGraphicsClockOffsetAllPerformanceLevels=50 -a GPUOverVoltageOffset=100

## Overclocking not working with Unknown Error

If you are running Xorg as a non-root user and trying to overclock your NVIDIA GPU, you will get an error similar to this one:

    $ nvidia-settings -a "[gpu:0]/GPUGraphicsClockOffset[3]=10"

    ERROR: Error assigning value 10 to attribute 'GPUGraphicsClockOffset' (trinity-zero:1[gpu:0]) as specified in assignment
            '[gpu:0]/GPUGraphicsClockOffset[3]=10' (Unknown Error).

To avoid this issue, Xorg has to be run as the root user. See Xorg#Rootless Xorg for details.

## System will not boot after driver was installed

If after installing the NVIDIA driver your system becomes stuck before reaching the display manager, try to disable kernel mode setting.

## X fails with "Failing initialization of X screen"

If `/var/log/Xorg.0.log` says X server fails to initialize screen

    (EE) NVIDIA(G0): GPU screens are not yet supported by the NVIDIA driver
    (EE) NVIDIA(G0): Failing initialization of X screen

and nvidia-smi says `No running processes found`

The solution is at first reinstall latest nvidia-utils, and then copy `/usr/share/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf` to `/etc/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf`, and then edit `/etc/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf` and add the line `Option "PrimaryGPU" "yes"`. Restart the computer. The problem will be fixed.

## System does not return from suspend

What you see in the log:

    kernel: nvidia-modeset: ERROR: GPU:0: Failed detecting connected display devices
    kernel: nvidia-modeset: ERROR: GPU:0: Failed detecting connected display devices
    kernel: nvidia-modeset: WARNING: GPU:0: Failure processing EDID for display device DELL U2412M (DP-0).
    kernel: nvidia-modeset: WARNING: GPU:0: Unable to read EDID for display device DELL U2412M (DP-0)
    kernel: nvidia-modeset: ERROR: GPU:0: Failure reading maximum pixel clock value for display device DELL U2412M (DP-0).

A possible solution based on [3]:

Run this command to get the `version` string:

    # strings /sys/firmware/acpi/tables/DSDT | grep -i 'windows ' | sort | tail -1

Add the `acpi_osi=! "acpi_osi=version"` kernel parameter to your boot loader configuration.

Another possible cause to the issue could be the use of the nvidia-open package, as described here:

- https://bbs.archlinux.org/viewtopic.php?pid=2047692
- https://github.com/NVIDIA/open-gpu-kernel-modules/issues/450
- https://github.com/NVIDIA/open-gpu-kernel-modules/issues/223
- https://github.com/NVIDIA/open-gpu-kernel-modules/issues/94

## Vulkan error on applications start

The factual accuracy of this article or section is disputed.

Reason: Need confirmation by other users (Discuss in Talk:NVIDIA/Troubleshooting)

On executing an application that require Vulkan acceleration, if you get this error

    Vulkan call failed: -4

try to delete the `~/.nv` or `~/.cache/nvidia` directory.

## Extreme lag on Xorg

The factual accuracy of this article or section is disputed.

Reason: According to an NVIDIA developer this issue is not specific to GNOME and the rest of the comments on the issue do not mention multi-monitor setups. (Discuss in Talk:NVIDIA/Troubleshooting)

A common issue with Mutter is that animations, video playback and gaming cause extreme desktop lag on Xorg.

See NVIDIA/Tips and tricks#Preserve video memory after suspend.

This should resolve this issue, however if it did not, you are most likely out of luck. One way you can remedy this issue is by adding these options:

    /etc/environment

    CLUTTER_DEFAULT_FPS=YOUR_MAIN_DISPLAY_REFRESHRATE
    __GL_SYNC_DISPLAY_DEVICE=YOUR_MAIN_DISPLAY_OUTPUT_NAME

turning `Sync to VBlank` and `Allow flipping` off within NVIDIA Settings, and configuring NVIDIA Settings to launch on startup using the flag `--load-config-only`. This will still result in a laggy desktop behavior, in particular on an eventual second (or third) monitor, but it should be much better.

## Visual glitches, hangs and errors in OpenGL applications

If you are using a recent CPU (Intel Sandy Bridge (2011) and later or AMD Zen (2017) and later) it has a micro operations cache. Using a micro op cache can lead to problems with NVIDIA's driver in OpenGL due to Cache Aliasing [4]. You usually are able to disable the micro op cache in your systems BIOS, but this comes at the cost of performance [5]. Disabling the micro op cache also helps with the most severe graphical glitches in Xwayland applications, although it does not solve the problem fully [6].

Categories:

- Graphics
- X server

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