apport information
** Tags added: apport-collected stonking
** Description changed:
On Ubuntu 26.10 (Ubuntu Budgie, Wayland session via labwc), the desktop
session
exits about one second after login on linux-image-7.3.0-9-generic 7.3.0-9.9
and
LightDM returns to the greeter. The same system works with the mainline kernel
7.3.0-070300rc3-generic, and with 7.0.0-38-generic.
Environment
- Proxmox VE 9.2 VM, QEMU pve-qemu-kvm 11.0.3-4, q35, OVMF, display:
virtio-vga
(virtio_gpu: -virgl +edid -resource_blob, 1 scanout)
- linux-image-7.3.0-9-generic 7.3.0-9.9
- labwc 0.20.1-1, libwlroots-0.20 0.20.2-1, budgie-desktop 10.10.2-1ubuntu6,
budgie-session 1.0.1-2ubuntu1, libdrm2 2.4.134-3, mesa 26.2.4-1ubuntu1
labwc output (~/.xsession-errors) on 7.3.0-9:
[ERROR] [backend/drm/properties.c:85] Failed to get DRM object 36
properties: Invalid argument
[ERROR] [backend/backend.c:255] Failed to create DRM backend
[ERROR] [backend/backend.c:266] Could not successfully create backend on
any GPU
[ERROR] [backend/backend.c:420] Failed to open any DRM device
[ERROR] [../src/server.c:493] unable to create backend
DRM object 36 is the virtio-gpu cursor plane (/sys/kernel/debug/dri/1/state):
plane[36]: plane-1 crtc=crtc-0 size=64x64 format=AR24 ...
color-pipeline=0
So drmModeObjectGetProperties() on the cursor plane fails with EINVAL, and
wlroots treats this as fatal. The plane shows the new color-pipeline state;
possibly related to the colorop/COLOR_PIPELINE changes in this kernel.
Other observations on the same kernel
- The LightDM greeter (Xorg) starts and works.
- KDE Plasma 6.7.5 Wayland (kwin_wayland) runs on 7.3.0-9-generic in another
VM with the same virtio-vga setup.
- Kernel DRM/virtio Kconfig is the same as mainline 7.3.0-rc3 (only DRM_NOVA
differs), so the difference is likely an Ubuntu patch.
Steps to reproduce
1. Ubuntu Budgie 26.10 in a QEMU/KVM VM with virtio-vga.
2. Boot 7.3.0-9-generic and log in to the "Budgie Desktop" session.
3. The session ends immediately; labwc logs the errors above.
Expected: labwc starts as it does on mainline 7.3.0-rc3.
+ ---
+ ProblemType: Bug
+ ApportVersion: 2.36.0-0ubuntu1
+ Architecture: amd64
+ AudioDevicesInUse:
+ USER PID ACCESS COMMAND
+ /dev/snd/seq: lightdm 1269 F.... pipewire
+ CasperMD5CheckResult: unknown
+ DistroRelease: Ubuntu 26.10
+ InstallationDate: Installed on 2020-06-27 (2305 days ago)
+ InstallationMedia: Ubuntu-Budgie 20.04 LTS "Focal Fossa" - Release amd64
(20200423)
+ MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
+ Package: linux (not installed)
+ ProcEnviron:
+ LANG=en_US.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-kitty
+ ProcFB: 0 virtio_gpudrmfb
+ ProcKernelCmdLine:
initrd=\b81bbe03dee64081a795feb48443cd91\7.3.0-9-generic\initrd.img-7.3.0-9-generic
root=UUID=0d4719e5-07f1-4504-9d0a-884fae59959c ro
systemd.machine_id=b81bbe03dee64081a795feb48443cd91
+ ProcVersionSignature: Ubuntu 7.3.0-9.9-generic 7.3.0-rc6
+ PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
+ RfKill:
+
+ Tags: stonking
+ Uname: Linux 7.3.0-9-generic x86_64
+ UpgradeStatus: Upgraded to stonking on 2026-10-12 (7 days ago)
+ UserGroups: N/A
+ _MarkForUpload: True
+ dmi.bios.date: 08/26/2026
+ dmi.bios.release: 0.0
+ dmi.bios.vendor: Proxmox distribution of EDK II
+ dmi.bios.version: 4.2026.08-1
+ dmi.chassis.type: 1
+ dmi.chassis.vendor: QEMU
+ dmi.chassis.version: pc-q35-11.0
+ dmi.modalias:
dmi:bvnProxmoxdistributionofEDKII:bvr4.2026.08-1:bd08/26/2026:br0.0:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-11.0:cvnQEMU:ct1:cvrpc-q35-11.0:sku:pfa:
+ dmi.product.name: Standard PC (Q35 + ICH9, 2009)
+ dmi.product.version: pc-q35-11.0
+ dmi.sys.vendor: QEMU
** Attachment added: "AlsaInfo.txt"
https://bugs.launchpad.net/bugs/2171096/+attachment/6010596/+files/AlsaInfo.txt
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2171096
Title:
7.3.0-9-generic: virtio-gpu cursor plane properties return EINVAL,
wlroots/labwc (Ubuntu Budgie Wayland) fails to start
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2171096/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
