[Intel-gfx] [PATCH] Dont use hardware acceleration on Sandybridge rev 07 hardware or earlier.

[Zou, Nanhai]

>>-----Original Message-----
>>From: intel-gfx-bounces+nanhai.zou=intel.com at lists.freedesktop.org
>>[mailto:intel-gfx-bounces+nanhai.zou=intel.com at lists.freedesktop.org] On
>>Behalf Of Keith Packard
>>Sent: 2010年11月21日 12:00
>>To: Matthias Hopf; Chris Wilson
>>Cc: intel-gfx at lists.freedesktop.org
>>Subject: Re: [Intel-gfx] [PATCH] Dont use hardware acceleration on Sandybridge
>>rev 07 hardware or earlier.
>>
>>On Sat, 20 Nov 2010 16:17:40 +0100, Matthias Hopf <mhopf at suse.de> wrote:
>>
>>> I know, I know. The patch is (one of) the results of the Novell-HP-Intel
>>> workshop in Taipei this week. It turned out that rev07 is too unstable.
>>> Keith and Eric can probably comment on this. Better than I can.
>>
>>There's a work-around in the kernel for pre rev-8 hardware that ensures
>>every time the blt ring is advanced by the CPU, the first command
>>executes a batch buffer. So the hardware is obviously quite broken.
>>
>>This workaround doesn't work perfectly, and the GPU will still lock up
>>when executing commands out of the blt ring from time to time. As pre
>>rev-8 hardware is all pre-production, the workarounds should be removed
>>From the driver and all acceleration disabled.
>>

Hi,
	I can not reproduce the issue here on a pre rev-8 system.
Dose it still hang if disable RC6?
Set 0 for nit 18 in 0xA090?

Thanks
Zou Nanhai
>>--
>>keith.packard at intel.com