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kern/51675: radeondrmkms wedge with supertuxkart
>Synopsis: radeondrmkms wedge with supertuxkart
>Arrival-Date: Tue Nov 29 23:55:00 +0000 2016
>Originator: David A. Holland
>Release: NetBSD 7.99.42 (20161125)
System: NetBSD valkyrie 7.99.42 NetBSD 7.99.42 (VALKYRIE) #20: Fri Nov 25 18:33:19 EST 2016 dholland@valkyrie:/usr/src/sys/arch/amd64/compile/VALKYRIE amd64
Now that we think 50349 is fixed I updated another machine with the
same radeon card to -current, and discovered that supertuxkart wedges
the X server and/or console.
In particular, when you open supertuxkart and start a race, the X
server hangs cold. It doesn't seem to wedge the rest of the system,
although my options for investigating the wedge state are somewhat
limited at the moment.
Once when I did this supertuxkart cored instead, which is maybe/maybe
not a different issue.
While poking around I found that running teapot from MesaDemos dumps
core, as does glxgears; running with env RADEON_THREAD=FALSE (as
suggested in 49838) to disable the thread in the gallium driver makes
glxgears run, but not teapot. (This much requires a fix to the gallium
driver build, or it doesn't load; but that's been committed.)
I haven't tried the thread thing with supertuxkart yet, but I will
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