** Merge proposal linked: https://code.launchpad.net/~antoinelassagne/ubuntu/+source/gnome-remote-desktop/+git/gnome-remote-desktop/+merge/494352
-- You received this bug notification because you are a member of Debcrafters packages, which is subscribed to gnome-remote-desktop in Ubuntu. https://bugs.launchpad.net/bugs/2127792 Title: Images are corrupted on blackwell GPUs Status in gnome-remote-desktop package in Ubuntu: New Status in gnome-remote-desktop source package in Noble: New Status in gnome-remote-desktop source package in Questing: New Status in gnome-remote-desktop source package in Resolute: New Bug description: There is image distorsion in gnome-remote-desktop when a Blackwell GPU is in use and NVENC is responsible for the video streaming. Upstream issue: https://gitlab.gnome.org/GNOME/gnome-remote- desktop/-/issues/263 A fix was just released by nvidia upstream, and also backported to GNOME 48: https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/merge_requests/344 https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/merge_requests/346 --------------------------- SRU Justification: [ Impact ] * This is a hardware enablement SRU. * gnome-remote-desktop, when used alongside NVENC for video streaming, simply does not work, because the image is broken. * With the above, the streaming is fixed. [ Fix ] * Nvidia devices never supported `NV_ENC_PARAMS_FRAME_FIELD_MODE_MBAFF`. Though the code worked for past, it causes interlaced line artifacts on Blackwell GPUs. * Using `NV_ENC_PARAMS_FRAME_FIELD_MODE_FRAME` and changing `grd-cuda-avc-utils` to produce progressive frames works on Blackwell and on older GPU generations. [ Test Plan ] * Test gnome-remote-desktop with and without the fix. Make sure which backend is in use. This can be checked by running `nvidia-smi dmon` and observing an encoder activity >0%. The repro only occurs when the NVENC path is used. CPU encoding path or non-H264 streaming is unaffected * Run the same test on an older GPU generation (Maxwell, ideally) [ Where problems could occur ] * Given the nature of the fix, it should not impact non-nvidia machines. * Also, the fix comes from nvidia themsleves, and it's in GNOME 48 and 49 already, so it's pretty safe. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-remote-desktop/+bug/2127792/+subscriptions -- Mailing list: https://launchpad.net/~debcrafters-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~debcrafters-packages More help : https://help.launchpad.net/ListHelp
