Datacenter GPUs are capped to 2560x1600 resolution for headless output unlike consumer GPUs

[ehfd]

Intended moderator for this request: @amrits and @generix

NOTE: This represents a bottleneck preventing a strategic trend of various user bases utilizing X11 Linux GUI in cloud infrastructure.

The links below were requests implemented in 535.xx and 550.xx to not limit headless displays with the ConnectedMonitor xorg.conf option in order to support the XRandR extension. UseDisplayDevice "None" does not support fullscreen applications requiring XRandR.

While consumer GPUs now support using ConnectedMonitor "DFP" to use headless displays with arbitrary resolution, Datacenter (Tesla) GPUs without display outputs are capped to 2560x1600 resolution for headless output.

It should be possible in Datacenter GPUs to also support large resolutions using ConnectedMonitor for headless XRandR support as well.

Display resolution limited to 2560x1600

I’m connecting to a virtual workstation using Nice DCV, and I’m unable to use resolutions higher than 2560x1600. What causes this limitation? Here’s the error in Xorg log file. [ 11558.675] (--) NVIDIA(GPU-0): NVIDIA VGX (DFP-0): connected [ 11558.675] (--) NVIDIA(GPU-0): NVIDIA VGX (DFP-0): External TMDS [ 11558.675] (WW) NVIDIA(GPU-0): Mode (3840 x 2400) larger than per-head max resolution [ 11558.675] (WW) NVIDIA(GPU-0): supported (2560 x 1600) I read that some vGPU licenses are limit…

Headless fullscreen RANDR usage with ConnectedMonitor has restricted resolution on even-numbered ports

This is a follow-up from the above topic. More references: Tagging @amrits to carry on from bug 4260425. So, the issue in the above topic got partially solved, but one issue still remains. This was written by @pagzma09 but this explains the currently remaining issue and thus I bring it here: In version 545.29.02 and also very likely 535.129.03 and later versions: When a monitor is marked with “ConnectedMonitor” the maximum pixel clock rate is reduced to HDMI 1.0’s 165.0 MHz and the dri…

Linux 535.xx does not honor ModeValidation, making headless Fullscreen RANDR usage with ConnectedMonitor impossible

NOTE: THIS IS AN IMPORTANT ISSUE AFFECTING ALL USERS WHO WANT TO USE FULLSCREEN APPLICATIONS IN HEADLESS ENVIRONMENTS THROUGH (X)RANDR WITHOUT A MONITOR CONNECTED Hi, I am a community developer of the open-source projects https://github.com/selkies-project/docker-nvidia-glx-desktop and https://github.com/selkies-project/docker-nvidia-egl-desktop, two projects which creates a working container with full X11 capabilities without any container privileges. This makes NVIDIA GPU GUI VDI environment…

Driver fails to validate 3440x1440@160Hz on Linux, works on Windows

Posting here as suggested by Andy. @crimist: Yes, I think your issue is unrelated to the DSC + multiple-heads-driving-one-monitor-behind-your-back functionality of this Issue. It would probably be best to start a new thread on the NVIDIA Linux forums. I would suggest adding the “ModeDebug” X configuration option to your X config file (nvidia-xconfig --mode-debug, or add it manually), then restart X11, and look at the X log. The log should list why each mode was considered valid or invalid. Th…

Relevant logs:

Option "ProbeAllGpus" "False" added to Screen "Screen0".
Option "IncludeImplicitMetaModes" "True" added to Screen "Screen0".
Option "ModeDebug" "True" added to Screen "Screen0".
Option "BaseMosaic" "False" added to Screen "Screen0".
Option "AllowEmptyInitialConfiguration" "True" added to Screen "Screen0".
New X configuration file written to '/etc/X11/xorg.conf'

ln: failed to create symbolic link '/dev/tty7': Permission denied
Waiting for X Socket
_XSERVTransmkdir: ERROR: euid != 0,directory /tmp/.X11-unix will not be created.

X.Org X Server 1.21.1.11
X Protocol Version 11, Revision 0
Current Operating System: Linux b20a2071c3a7 5.15.0-78-generic #85-Ubuntu SMP Fri Jul 7 15:25:09 UTC 2023 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.15.0-78-generic root=UUID=2d83aaf1-0314-4b23-8a0b-ad7e0b46a8b8 ro systemd.unified_cgroup_hierarchy=false
xorg-server 2:21.1.12-1ubuntu1 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.42.2
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/home/ubuntu/.local/share/xorg/Xorg.20.log", Time: Mon Oct 14 20:45:40 2024
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(EE)
Fatal server error:
(EE) no screens found(EE)
(EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
(EE) Please also check the log file at "/home/ubuntu/.local/share/xorg/Xorg.20.log" for additional information.
(EE)
(EE) Server terminated with error (1). Closing log file.

Xorg.0.log:
Xorg.txt (75.6 KB)