http://bugs.freedesktop.org/show_bug.cgi?id=21849
Summary: many lockups since 2.6.30-rc1
Product: DRI
Version: XOrg CVS
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: critical
Priority: medium
Component: DRM/Radeon
AssignedTo: dri-devel@lists.sourceforge.net
ReportedBy: fabio....@libero.it
After upgrading from Ubuntu 8.10 to 9.04 I noticed that I get a lot of lockups
(mostly random) with 3D applications (never had one with Ubuntu 8.10). At a
first I thought it was a mesa regression, updated from 7.2 to 7.4, however I
noticed the same lockups after downgrading to 7.2 (and with mesa master and
radeon-rewrite, btw).
Some lockups disappeared after upgrading to libdrm 2.4.9 (from Ubuntu's 2.4.5),
e.g. the sauerbraten lockup I got instantly after starting the game changed to
random lockups after some minutes of play. Other still occours (torcs instantly
lockups as soon as the race starts).
After some testing I noticed that the problem is the new drm module available
since kernel 2.6.30-rc1 (and backported to Ubuntu's 2.6.28). For testing I used
the game torcs: kernels working fine don't lockups, buggy kernels lockups
instantly as soon as the race starts.
I tried the following kernels:
buggy kernels:
Ubuntu's 2.6.28 (with its backported drm radeon module);
2.6.30-rc1 through 2.6.30-rc6 (installed from KernelMainlineBuilds PPA [0])
working kernels:
Ubuntu's 2.6.28, after updating drm.ko and radeon.ko from git drm [1]
2.6.27 through 2.6.29.3
Evidently something bad happened between 2.6.29 and 2.6.30-rc1. I have a RV530
(M56P) on a MacBook Pro (with 32 bit Ubuntu):
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M56P [Radeon
Mobility X1600] [1002:71c5]
A question: is the drm module in [1] getting updated with that of latest
kernels? Apparently not.
[0] https://wiki.ubuntu.com/KernelMainlineBuilds
[1] http://cgit.freedesktop.org/mesa/drm/
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