[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1787070
Title:
Guests using the qxl-vga are freezing
Status in QEMU:
Expired
Bug description:
I have noticed that guests using qxl-vga are freezing. They may freeze
after a few minutes or after many hours. The freeze consists of the
entire system hanging, except the cursor, but the cursor animation
stops too. Changing to tty is not possible after this. There are three
things noticed in common on the guests when they freeze:
-The guest is using the QXL VGA (freezes weren't observed with other VGAs);
-A new workload is starting;
-The mouse cursor is the animated as the one of loading. For example,
https://i.imgur.com/raQFteG.png
The host is Xubuntu 18.04 amd64, QEMU version is 3.0.0-dirty. The guests
tested were:
-openSUSE Tumbleweed;
-openSUSE Leap 15;
-Xubuntu 18.04 Bionic Beaver;
-CentOS 7.
With openSUSE guests, the install process couldn't even be finished,
as the installer would freeze. There were 2 GB of available memory
(checked in a tty before the freeze) and netconsole was enabled.
Unfortunately, it was impossible to obtain any information from them.
This is an image of one openSUSE guest frozen:
https://i.imgur.com/ZP0eQKq.png
The command line used was:
qemu-system-x86_64 -nodefaults -m 3072 -M pc,usb=true -accel kvm -cpu
host -smp cores=2,threads=2 -device qemu-xhci -drive
id=centusb,if=none,file=leap.qcow2 -device usb-
storage,id=centusb,drive=centusb -netdev user,id=n0 -device usb-
tablet,id=usbtablet -device e1000,netdev=n0 -device usb-
audio,id=usbaudio -device qxl-vga,xres=1366,yres=768 -display gtk
-monitor vc -serial vc -cdrom "openSUSE-Leap-15.0-DVD-x86_64.iso"
-boot d
With CentOS guests, the install process fail sometimes, but sometimes
it's able to install. However, on the yum update, it would freeze too.
In one instance it froze while updating glibc, which made the guest
unbootable. https://i.imgur.com/B3WhSDX.png
The command line used was:
qemu-system-x86_64 -nodefaults -m 2048 -M pc,usb=true -accel kvm -cpu
host -smp cores=2,threads=2 -device qemu-xhci -drive
id=centusb,if=none,file=centos.qcow2 -device usb-
storage,id=centusb,drive=centusb -netdev user,id=n0 -device usb-
tablet,id=usbtablet -device e1000,netdev=n0 -device usb-
audio,id=usbaudio -device virtio-vga,virgl=true -display gtk -monitor
vc -serial vc -cdrom "CentOS-7-livecd-GNOME-x86_64.iso" -bios
/usr/share/ovmf/OVMF.fd
With Xubuntu 18.04 guests, the system worked for many hours until the
freeze happened. On this case it happened when opening Audacious.
Fortunately, the logging services worked for some time, which allowed
me to get a relevant message which can be seen at
http://termbin.com/nuof . It repeated a few times, but then the
logging stopped. https://i.imgur.com/2zckqj5.png shows the guest
screen in the moment it froze.
The command line used was:
qemu-system-x86_64 -nodefaults -m 1024 -M pc,usb=true -accel kvm -cpu
host -smp cores=2,threads=2 -device qemu-xhci -drive
id=centusb,if=none,file=xubmini -device usb-
storage,id=centusb,drive=centusb -netdev user,id=n0 -device usb-
tablet,id=usbtablet -device e1000,netdev=n0 -device usb-
audio,id=usbaudio -device qxl-vga,xres=1366,yres=768 -display gtk
-monitor vc -serial vc
I'm sorry for not having more detailed information but, even setting
netconsole, openSUSE and CentOS guests were unable to print any
information.
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