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Bug 1340931 - qemu -nodefaults -sdl crashes
Summary: qemu -nodefaults -sdl crashes
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: qemu
Version: 24
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Fedora Virtualization Maintainers
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-05-30 18:02 UTC by Michael Young
Modified: 2016-06-25 19:26 UTC (History)
9 users (show)

Fixed In Version: qemu-2.6.0-4.fc24
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2016-06-25 19:26:44 UTC
Type: Bug
Embargoed:

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Description Michael Young 2016-05-30 18:02:48 UTC 
I am not sure if this due to qemu or xen (or both), but if I try booting a xen pv guest with graphics using /usr/bin/qemu-system-i386 I either get a crash with sdl or a failure to produce graphics with vnc.
The sdl crash (with qemu-system-x86-2.6.0-3.fc24.x86_64) has backtrace
#0  0x000056408e9f9e6e in sdl_display_init (ds=<optimized out>, full_screen=0, 
    no_frame=<optimized out>) at ui/sdl2.c:822
#1  0x000056408e793136 in main (argc=<optimized out>, argv=<optimized out>, 
    envp=<optimized out>) at vl.c:4571
where the qemu command line was
/usr/bin/qemu-system-i386 -xen-domid 2 -chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-2,server,nowait -no-shutdown -mon chardev=libxl-cmd,mode=control -chardev socket,id=libxenstat-cmd,path=/var/run/xen/qmp-libxenstat-2,server,nowait -mon chardev=libxenstat-cmd,mode=control -nodefaults -xen-attach -name f24test -vnc 127.0.0.1:0,to=99 -display none -sdl -machine xenpv -m 1024
and the command line for vnc was
/usr/bin/qemu-system-i386 -xen-domid 4 -chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-4,server,nowait -no-shutdown -mon chardev=libxl-cmd,mode=control -chardev socket,id=libxenstat-cmd,path=/var/run/xen/qmp-libxenstat-4,server,nowait -mon chardev=libxenstat-cmd,mode=control -nodefaults -xen-attach -name f24test -vnc 127.0.0.1:0,to=99 -display none -machine xenpv -m 1024
Comment 1 Cole Robinson 2016-05-31 20:38:10 UTC 
There's some weirdness here. The command line has both '-display none' and -vnc/-sdl, which seems odd, but I don't think it's the root issue. Maybe just a xen buglet

The root issue is that -nodefaults sets -vga none, which explains the lack of output for -vnc, and is tickling the sdl crash. So let's use this to track the sdl crasher, but maybe you need a xen bug if the lack of video hardware is unexpected
Comment 2 Cole Robinson 2016-05-31 21:01:40 UTC 
Patch posted: http://lists.nongnu.org/archive/html/qemu-devel/2016-05/msg05735.html
Comment 3 Fedora Update System 2016-06-22 17:32:35 UTC 
qemu-2.6.0-4.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-a80eab65ba
Comment 4 Fedora Update System 2016-06-22 23:00:44 UTC 
qemu-2.6.0-4.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-a80eab65ba
Comment 5 Fedora Update System 2016-06-25 19:22:42 UTC 
qemu-2.6.0-4.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
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