Red Hat Bugzilla – Bug 1274309
KDE isn't starting, showing only cursor on 32bit virtualized CPU (qemu32)
Last modified: 2016-12-20 10:06:13 EST
Created attachment 1085500 [details]
output from journal
Description of problem:
If I try to run 32bit Fedora 23 RC2 KDE Live in virtual machine, it doesn't get to KDE loading screen. Screen stays black with only cursor shown. kmigration tool flashes briefly.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Configure virt-manager to use 32bit CPU (I have used qemu32)
2. Try to boot 32bit Fedora 23 RC2 KDE Live
Only cursor is shown with black screen.
KDE should boot.
I don't have any non-64bit machine, so I am unable to test it on bare metal.
Created attachment 1085501 [details]
Created attachment 1085502 [details]
Video from test
I have tried to reproduce this on bare metal (with Pentium 4 32bit CPU) and while I hit a lot of other problems (starting of login service failed), I couldn't reproduce this particular bug, so this may be problem only with qemu32 CPU.
could you also test GNOME on your P4? With qemu32 it's broken also (shows the 'Oh no!' screen on boot), but I don't know if that affects any real hardware. I'm generally -1 to stuff that only affects qemu32, it's a fairly artificial scenario.
Discussed at 2015-10-22 Go/No-Go meeting, acting as a blocker review meeting: https://meetbot-raw.fedoraproject.org/fedora-meeting-2/2015-10-22/f23-final-go_no_go-meeting.2015-10-22-16.00.log.txt . So far we haven't been able to reproduce this (or the similar GNOME bug) on any real 32-bit hardware, even with 'nomodeset' to try and force use of llvmpipe; so long as it's restricted to qemu32 it's a fairly artificial scenario, so it's rejected as a blocker. We may re-consider this if we manage to find a real-world case that's affected by the bug.
I've tested GNOME Live on P4 and it works, so only problem is with `qemu32` CPU. I think that we could close this (as qemu32 is obscure by itself), but we should find what CPU to virtualize to test pure 32bit CPU.
I'm not sure we really can get a great 32-bit virt test environment :/
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