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From: Andreas Schwab <schwab@linux-m68k.org>
To: Michel =?utf-8?Q?D=C3=A4nzer?= <michel@daenzer.net>
Subject: Re: PowerPC radeon KMS - is it possible?
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Date: Wed, 18 Apr 2012 09:54:46 +0200
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Michel Dänzer <michel@daenzer.net> writes:

> Probably not (AGP is flaky in general, but in particular with older
> UniNorth bridges), but it might be interesting to see some kernel output
> from booting without agpmode=-1. If you can't get it via ssh, maybe you
> can via netconsole or so.

While logging into KDE:

radeon 0000:00:10.0: GPU lockup CP stall for more than 10064msec
GPU lockup (waiting for 0x000003EE last fence id 0x000003ED)
radeon: wait for empty RBBM fifo failed ! Bad things might happen.
Failed to wait GUI idle while programming pipes. Bad things might happen.
radeon 0000:00:10.0: (r300_asic_reset:414) RBBM_STATUS=0x8802C137
radeon 0000:00:10.0: (r300_asic_reset:433) RBBM_STATUS=0x8802C137
radeon 0000:00:10.0: (r300_asic_reset:445) RBBM_STATUS=0x8802C137
radeon 0000:00:10.0: GPU reset succeed
radeon 0000:00:10.0: GPU reset succeed
radeon 0000:00:10.0: (r300_asic_reset:414) RBBM_STATUS=0x8802C137
radeon 0000:00:10.0: (r300_asic_reset:433) RBBM_STATUS=0x8802C137
radeon 0000:00:10.0: (r300_asic_reset:445) RBBM_STATUS=0x8802C137
radeon 0000:00:10.0: GPU reset succeed
radeon: wait for empty RBBM fifo failed ! Bad things might happen.
Failed to wait GUI idle while programming pipes. Bad things might happen.

After that is is dead.  GPU lockup appears to be a common problem with
the radeon driver.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."