slight screen corruption when maximizing window

[Andreas Hasenack]

Host: Ubuntu disco
qemu-kvm: 1:3.1+dfsg-2ubuntu2
libvirt: 5.0.0-1ubuntu2

Guest: ubuntu bionic
guest is using cirrus video, with the extra modules kernel package installed and the cirrus kernel module loaded. I also tried QXL, but got the same problem.

A non-maximized terminal window works just fine. As an example, I run "lsmod". It fills the screen, which then scrolls a bit.

The moment I maximize that window, though, the rendering breaks. I can see the commands I type, but not their output. See attached video.

[Andreas Hasenack (ahasenack)]

lsmod run on a non-maximized window. All looks good.

[Andreas Hasenack (ahasenack)]

continuing from the previous screenshot, all I did here was to click the maximize button. We can already see some bad rendering on the top right corner.

[Andreas Hasenack (ahasenack)]

Here, with the maximized window, I typed several commands again: lsmod, clear, clear. If you look carefully, you can see the clear at the bottom, then at the top again, and nothing changes. All I can see are the characters I type, but not the command's output or effect. The screen doesn't clear, and the list of modules produced by "lsmod" doesn't appear.

[Thomas Huth (th-huth)]

Looking through old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays?

[Launchpad Janitor (janitor)]

[Expired for QEMU because there has been no activity for 60 days.]