action #61994
closed
VNC console corruption on aarch64
Added by MDoucha over 4 years ago.
Updated about 4 years ago.
Description
A random problem sometimes appears on aarch64 test machines where the VM screen isn't properly cleared after boot and console output gets drawn over remnants of boot splash screen. Then the job fails because needles don't match. The problem appears less than once a week and job restart usually fixes it but it might be worth investigating further.
https://openqa.suse.de/tests/3773959#step/update_kernel/6
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How do you imagine we investigate this? I expect a qemu problem - and all such random qemu problems we filed, just got old in bugzilla.
While I agree with coolo that the fix probability is low I also think that mdoucha picked a valid approach. I prefer having actual issues reported and trying to at least handle workarounds automatically rather than repeatedly manually retriggering jobs :)
I reported https://bugzilla.opensuse.org/show_bug.cgi?id=1160707 and will create a workaround needle referencing the bug. This should be good enough to keep tests running. If the test will be closed without a fix we can replace the workaround needle with a normal needle that is forgiving enough to also accept the distorted screen as usable.
Setting to "Feedback" with due date for myself to check if the workaround needle is effective.
Created new needle "linux-login-corrupted_boot_screen-boo1160707-20200111" like this:
- Status changed from Feedback to Resolved
- Target version changed from Current Sprint to Done
- Status changed from Resolved to Feedback
- Target version changed from Done to Ready
- Status changed from Feedback to Resolved
no problem to create an updated needled: tty1-selected-corrupted_boot_screen-boo1160707-20200203
Oh, I see. I didn't know that the white circles can be covered by text as well. I assumed the animation would keep a detectable picture in foreground often enough. Ok, created "linux-login-corrupted_boot_screen-boo1160707-20200217" which should be even more resilient.
okurz wrote:
Oh, I see. I didn't know that the white circles can be covered by text as well. I assumed the animation would keep a detectable picture in foreground often enough. Ok, created "linux-login-corrupted_boot_screen-boo1160707-20200217" which should be even more resilient.
If this is a VNC bug, there is no animation running in the background anymore when this corruption happens. Then animation ended. The console was cleared with solid black color but the VNC client didn't notice. THEN the text was printed on empty black screen but the VNC client rendered it into its dirty buffer.
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