[Help][RS780E][mipsel]Screen corruption sometimes

Alex Deucher alexdeucher at gmail.com
Mon Aug 8 07:00:13 PDT 2011

2011/8/8 Chen Jie <chenj at lemote.com>:
> Hi,
> 在 2011年8月7日 下午4:35,Chen Jie <chenj at lemote.com> 写道:
>> 2011/8/4 Michel Dänzer <michel at daenzer.net>:
>>> You can try booting with radeon.test=1 and see in dmesg if the transfer
>>> tests triggered by that succeed.
>> Seems has some test failure, see attachment radeon.test.log
> I did the same test on a x86 machine with RS780E, running ubuntu
> 10.10(linux 2.6.35), BO move testing reports no error.
> Maybe some arch-depend problems?

How is the system initialized on your platform?  Do you run the x86
system bios in an emulator?  There are some suspicious messages in
your dmesg log:
[    0.542968] radeon 0000:01:05.0: BAR 6: can't assign [???
0x00000000 flags 0x0] (bogus alignment)
[    0.542968] [drm] No integrated system info for your GPU, using safe default
[    0.542968] [drm] Unsupported IGP table: 1 4

The system bios is responsible for a certain amount of the gfx
initialization on the IGP chips.  The sbios sets up the reserved
window of vram at the top of system ram and it is also responsible for
patching certain vbios data tables, notably the IntegratedSystemInfo
table which has platform specific information about your IGP setup
that the driver needs for certain things.


> Regards,
> - Chen Jie
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