[Desktop-packages] [Bug 1972914] Re: frequent 15-sec guest freeze with ubuntu 22.04 host and guest
Hi everyone, $ cd Work/kernel/ubuntu-jammy/ ~/Work/kernel/ubuntu-jammy$ git log --grep 'Revert "drm/qxl: simplify qxl_fence_wait"' commit 1b146e3dc802253fd9a6e29e2d3b06d003fe9182 Author: Alex Constantino Date: Thu Apr 4 19:14:48 2024 +0100 Revert "drm/qxl: simplify qxl_fence_wait" ... ~/Work/kernel/ubuntu-jammy$ git describe --contains 1b146e3dc802253fd9a6e29e2d3b06d003fe9182 Ubuntu-5.15.0-115.125~199 ~/Work/kernel/ubuntu-jammy$ cd .. ~/Work/kernel$ cd ubuntu-noble/ ~/Work/kernel/ubuntu-noble$ git log --grep 'Revert "drm/qxl: simplify qxl_fence_wait"' origin/master-next commit ee451375fd8b767eb91721fa389b022f1582cb0f Author: Alex Constantino Date: Thu Apr 4 19:14:48 2024 +0100 Revert "drm/qxl: simplify qxl_fence_wait" ... ~/Work/kernel/ubuntu-noble$ git describe --contains ee451375fd8b767eb91721fa389b022f1582cb0f Ubuntu-6.8.0-38.38~331 This has been fixed in 5.15.0-115-generic or later, and 6.8.0-38-generic or later. Let me know if you need any more help. Thanks, Matthew ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: xserver-xorg-video-qxl (Ubuntu) Status: Confirmed => Invalid ** Also affects: linux (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: xserver-xorg-video-qxl (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: xserver-xorg-video-qxl (Ubuntu Noble) Importance: Undecided Status: New ** No longer affects: xserver-xorg-video-qxl (Ubuntu Jammy) ** No longer affects: xserver-xorg-video-qxl (Ubuntu Noble) ** Changed in: linux (Ubuntu) Status: New => Fix Released ** Changed in: linux (Ubuntu Jammy) Status: New => Fix Released ** Changed in: linux (Ubuntu Noble) Status: New => Fix Released -- 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 linux package in Ubuntu: Fix Released Status in xserver-xorg-video-qxl package in Ubuntu: Invalid Status in linux source package in Jammy: Fix Released Status in linux source package in Noble: Fix Released 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 :00:01.0: object_init failed for (8298496, 0x0001) 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/linux/+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
[Desktop-packages] [Bug 1972914] Re: frequent 15-sec guest freeze with ubuntu 22.04 host and guest
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: xserver-xorg-video-qxl (Ubuntu) Status: New => Confirmed -- 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: Confirmed 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 :00:01.0: object_init failed for (8298496, 0x0001) 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
[Desktop-packages] [Bug 1972914] Re: frequent 15-sec guest freeze with ubuntu 22.04 host and guest
I'm seeing this on Debian 12 without Wayland or Xorg simply by running #!/bin/bash chvt 3 for j in $(seq 80); do echo "$(date) starting round $j" if [ "$(journalctl --boot | grep "failed to allocate VRAM BO")" != "" ]; then echo "bug was reproduced after $j tries" exit 1 fi for i in $(seq 100); do dmesg > /dev/tty3 done done echo "bug could not be reproduced" exit 0 This allowed me to run git bisect which identified the following commit: commit 5a838e5d5825c85556011478abde708251cc0776 (refs/bisect/bad) Author: Gerd Hoffmann Date: Thu Feb 4 15:57:10 2021 +0100 drm/qxl: simplify qxl_fence_wait Now that we have the new release_event wait queue we can just use that in qxl_fence_wait() and simplify the code a lot. Signed-off-by: Gerd Hoffmann Acked-by: Thomas Zimmermann Link: http://patchwork.freedesktop.org/patch/msgid/20210204145712.1531203-10-kra...@redhat.com -- 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 :00:01.0: object_init failed for (8298496, 0x0001) 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
[Desktop-packages] [Bug 1972914] Re: frequent 15-sec guest freeze with ubuntu 22.04 host and guest
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 :00:01.0: object_init failed for (8298496, 0x0001) 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
[Desktop-packages] [Bug 1972914] Re: frequent 15-sec guest freeze with ubuntu 22.04 host and guest
Increasing video memory appears to have fixed my problem. My virtual screen size is 1920x1080 and in virt-manager's Video panel / XML tab, vgamem was set to the default value of 16384. After increasing it to 65536, I'm no longer seeing the freeze (though with only a few minutes of testing, so far). I don't know enough about this software to know if this means there is no flaw in QXL. If it does, then this bug report can be closed, although the freeze is a confusing failure mode. It would be nice if the overall user experience could be improved somehow. Perhaps the gnome Settings program's Displays panel could detect when a resolution is requested which exceeds available video memory and prevent it, preferably with a useful message to the user. -- 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 :00:01.0: object_init failed for (8298496, 0x0001) 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
