* Joerg Roedel <joro@xxxxxxxxxx> wrote: > On Wed, Apr 13, 2011 at 07:33:40PM -0700, Linus Torvalds wrote: > > we definitely want to also understand the reason for things not > > working, even if we do revert.. > > Okay, here it is. > > After experimenting with different configurations for the north-bridge > it turned out that a GART related MCE fires at the time the machine > reboots. BIOSes configure the machine to sync-flood in that case which > causes a reboot. > > After decoding the MCE it turned out to be a GART TBL Wlk Error. Such > errors can happen if devices (speculativly) access GART ranges mapped > invalid. The AMD BKDG for Fam10h CPUs recommends to disable these errors > at all. But unfortunatly some BIOSes (including the one on my laptop) > forget to do this. > > Below is a patch which disables these errors if the BIOS didn't do it. > It fixes the problem on my site. Ok, but how did the allocation changes start triggering this error in v2.6.39-rc1? There must still be some layout specific thing here, right? Do we understand the details of that as well? Thanks, Ingo _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
