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Date: Sun, 23 Dec 2012 11:01:37 +0000
From: Andy Furniss <andyqos@ukfsn.org>
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To: Borislav Petkov <bp@alien8.de>, Alex Deucher <alexdeucher@gmail.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        dri-devel@lists.freedesktop.org, lkml <linux-kernel@vger.kernel.org>
Subject: Re: radeon 0000:02:00.0: GPU lockup CP stall for more than 10000msec
References: <20121222203547.GA5319@liondog.tnic> <CADnq5_MJzNdWVCauZj5Z7Monmsy4gWeYP3gJaPUPwHEgqhqOYw@mail.gmail.com> <20121223002507.GA12121@liondog.tnic> <CADnq5_Oe=_nOrsgUZvPc82F5CFAWecx=Uiqn0CAeK+YG3ns3AA@mail.gmail.com> <20121223105527.GA6230@liondog.tnic>
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Borislav Petkov wrote:

> [   28.191072] radeon: `0' invalid for parameter `wb'
>
> although the whole driver blubber didn't appear on the console fterwards
> aso something got turned off allright.
>
> Then, I went and tried "radeon.no_wb" where the driver blubber appeared
> but AGP writeback was still enabled:

no_wb=1 should work.