Messages in this thread | | | Subject | Re: [git pull] agp patches for 2.6.28-rc1. | From | Keith Packard <> | Date | Sun, 19 Oct 2008 17:19:37 -0700 |
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On Mon, 2008-10-20 at 01:44 +0200, Andres Freund wrote: > Hi Dave, > > On Monday 20 October 2008 01:25:22 Dave Airlie wrote: > > What type of laptop is it and what GPU has it. > > if distros are carrying GM45 supporting stuff we might be in trouble..
The GM45/G45 support in both kernel and user space was horribly broken, causing the kernel to either overwrite stolen entries with freshly allocated pages, and potentially corrupt the system, or leave some GTT entries uninitialized and cause the hardware to lock up.
You appear to have a happy situation where this bug isn't obviously breaking things. We couldn't find any machines where even simple 2D graphics was stable for very long.
We applied a patch to both kernel and 2D driver (as both end up computing the size of the GTT stolen area for historical reasons) to fix this mistake. Updating your 2D driver to 2.4.98 should get you the other half of the fix.
> Its a Thinkpad T500 with a hybrid ATI/intel card, but the ATI card is disabled > in bios (Intel card is not recognized properly if its enabled, havent started > trying to track this down).
Yeah, I'm getting information about how 'hybrid' graphics hardware works.
-- keith.packard@intel.com [unhandled content-type:application/pgp-signature] | |