Confirming this report on: Ubuntu 22.04 Host with: Lenovo Server Dual 16 Core CPUs (with hyperthreading == 64 CPUS) 384GB RAM Ubuntu 22.04 Libvirt 8.0.0 QEMU API 8.0.0 Hyervisor QEMU 6.2.0
Ubuntu 22.04 Desktop Guest with: Q35 VM with OVMF 4 x CPU 8192MB RAM Trying to run "snap Eclipse". UI performance is so bad that it is unusable. I have testing the same software configuration with Ubuntu 20.04 Quest with only 2 CPU/4096MB RAM and performance is very snappy and no issues. On my 22.04 quest I also have a lot of qxl errors in my kern.log: sudo grep 'drm:qxl_alloc' kern.log Sep 11 21:08:36 graphit kernel: [ 103.590807] [drm:qxl_alloc_bo_reserved [qxl]] *ERROR* failed to allocate VRAM BO Sep 11 21:11:09 graphit kernel: [ 256.682227] [drm:qxl_alloc_bo_reserved [qxl]] *ERROR* failed to allocate VRAM BO Sep 11 21:11:42 graphit kernel: [ 289.705678] [drm:qxl_alloc_bo_reserved [qxl]] *ERROR* failed to allocate VRAM BO Sep 11 21:12:00 graphit kernel: [ 307.625499] [drm:qxl_alloc_bo_reserved [qxl]] *ERROR* failed to allocate VRAM BO Sep 11 21:12:18 graphit kernel: [ 325.801386] [drm:qxl_alloc_bo_reserved [qxl]] *ERROR* failed to allocate VRAM BO ... ... I updated libvert vgamem as per your finding and now have workable VM again. So while there is work around I believe there should be some fix in libvirt/qemu to ensure that VM is configured with vgamem value that results in working VM. I have posted my testing in details here: https://tips.graphica.com.au/ubuntu-eclipse-snap-is-broken/ Thank you for posting the bug report. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-qxl in Ubuntu. https://bugs.launchpad.net/bugs/1972914 Title: frequent 15-sec guest freeze with ubuntu 22.04 host and guest Status in xserver-xorg-video-qxl package in Ubuntu: New Bug description: I'm running a new installation of Ubuntu 22.04 Desktop on a Thinkpad T450s (core i5-5200, 2 cores / 4 vCPUs, 12 GB memory). Using the virt- manager GUI, I performed what I believe is a simple, plain-vanilla installation of an Ubuntu 22.04 guest running under qemu/kvm with 2 vCPUs and 4 GB memory. I'm seeing very frequent, 15-second freezes of the guest. When it happens, the guest is completely unresponsive. After about 15 seconds, it works normally again, until the next freeze. The duration of the freeze appears to be the same every time. The guest isn't doing much - just open the calculator app and click number buttons. The freeze doesn't happen if I don't interact with the guest (just leave the system monitor running in the guest, so I can see that it's not frozen). I observe the freeze when I have 2 of the 4 vCPUs dedicated to the guest. I do NOT observe it when I have only one vCPU dedicated to the guest. Both the host and guest are using only a small fraction of the memory available to them. When the problem happens, the host indicates that CPU usage is very low across all vCPUs. The host appears to be operating normally when the guest is frozen. I see the following pair of lines in the guest syslog every time the freeze occurs (and only when the freeze occurs): May 10 13:48:40 qemu-jammy kernel: [ 144.259799] qxl 0000:00:01.0: object_init failed for (8298496, 0x00000001) May 10 13:48:40 qemu-jammy kernel: [ 144.259819] [drm:qxl_alloc_bo_reserved [qxl]] *ERROR* failed to allocate VRAM BO I don't see anything in the host syslog that correlates with the freeze. If I choose "Virtio" in the Video drop-down in the virt-manager GUI, with "3D acceleration" UNchecked, the guest works fine, and the freeze never happens. Unfortunately, that loses fractional scaling, which is important to me. If I check "3D acceleration," the guest won't boot. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-qxl/+bug/1972914/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
