Bug 1274309 - KDE isn't starting, showing only cursor on 32bit virtualized CPU (qemu32)
Summary: KDE isn't starting, showing only cursor on 32bit virtualized CPU (qemu32)
Alias: None
Product: Fedora
Classification: Fedora
Component: plasma-workspace
Version: 23
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: KDE SIG
QA Contact: Fedora Extras Quality Assurance
Whiteboard: RejectedBlocker
Depends On:
TreeView+ depends on / blocked
Reported: 2015-10-22 13:15 UTC by Jan Sedlák
Modified: 2016-12-20 15:06 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2016-12-20 15:06:13 UTC
Type: Bug

Attachments (Terms of Use)
output from journal (168.38 KB, text/x-vhdl)
2015-10-22 13:15 UTC, Jan Sedlák
no flags Details
Xorg log (19.98 KB, text/plain)
2015-10-22 13:15 UTC, Jan Sedlák
no flags Details
Video from test (313.75 KB, application/octet-stream)
2015-10-22 13:16 UTC, Jan Sedlák
no flags Details

Description Jan Sedlák 2015-10-22 13:15:09 UTC
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

Actual results:
Only cursor is shown with black screen.

Expected results:
KDE should boot.

Additional info:
I don't have any non-64bit machine, so I am unable to test it on bare metal.

Comment 1 Jan Sedlák 2015-10-22 13:15:49 UTC
Created attachment 1085501 [details]
Xorg log

Comment 2 Jan Sedlák 2015-10-22 13:16:40 UTC
Created attachment 1085502 [details]
Video from test

Comment 3 Jan Sedlák 2015-10-22 13:54:44 UTC
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.

Comment 4 Adam Williamson 2015-10-22 16:07:05 UTC
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.

Comment 5 Adam Williamson 2015-10-22 17:11:53 UTC
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.

Comment 6 Jan Sedlák 2015-10-26 12:56:47 UTC
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.

Comment 7 Adam Williamson 2015-10-26 15:41:02 UTC
I'm not sure we really can get a great 32-bit virt test environment :/

Comment 8 Fedora End Of Life 2016-11-24 12:52:19 UTC
This message is a reminder that Fedora 23 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 23. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '23'.

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able to fix it before Fedora 23 is end of life. If you would still like 
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Comment 9 Fedora End Of Life 2016-12-20 15:06:13 UTC
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

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