Messages in this thread | | | Date | Fri, 18 Dec 2009 15:44:35 +0100 | From | Jerome Glisse <> | Subject | Re: radeon KMS causes GART Table Walk Errors (was: K8 ECC error with linux-2.6.32) |
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On Fri, Dec 18, 2009 at 02:47:00PM +0100, Johannes Hirte wrote: > Am Mittwoch 16 Dezember 2009 20:31:48 schrieb Johannes Hirte: > > Am Mittwoch 16 Dezember 2009 19:41:48 schrieb Jerome Glisse: > > > On Wed, Dec 16, 2009 at 03:58:30PM +0100, Johannes Hirte wrote: > > > > Am Mittwoch 16 Dezember 2009 08:14:43 schrieb Borislav Petkov: > > > > > On Tue, Dec 15, 2009 at 11:00:46PM +0100, Johannes Hirte wrote: > > > > > > This patch (as the BIOS option) will only disable the error > > > > > > reports. The error itself will still occur, right? So necessary to > > > > > > find out why the radeon driver trigger this error. > > > > > > > > > > Because the graphics driver does aperture accesses with no > > > > > matching GART translation, and the hw generates mchecks for > > > > > that. The whole story on GART table walk errors is in section > > > > > "13.10.1 GART Table Walk Error Reporting" in the document here: > > > > > http://support.amd.com/us/Processor_TechDocs/32559.pdf > > > > > > > > > > I can't say for sure about your BIOS, but if it is done as described > > > > > in the abovementioned section, the BIOS option should disable logging > > > > > of the error, which implies reporting too. > > > > > > > > > > The patch is still needed for machines that do not have that BIOS > > > > > option. > > > > > > > > Disabling in BIOS doesn't made any difference. The errors were still > > > > reported. Your patch disabled it. But I think this will make work > > > > harder for driver developers as they won't get this error anymore. > > > > Could this be made changeable on runtime/boottime? > > > > > > > > I've added drm people to CC as they're responsible for this error. > > > > > > > > > > > > regards, > > > > Johannes > > > > > > More context would be usefull. Are you using KMS ? If so is your > > > userspace KMS capable ? Does this GART error happen all the time or only > > > after sometimes or when doing somethings specific ? > > > > Yes I'm using KMS when this error occours. > > Hardware: > > - Tyan Tiger K8W S8875 (AMD8151 Northbridge) > > - Radeon HD3650 AGP (RV635) > > > > Software: > > - linux-2.6.32 > > - libdrm-2.4.16 > > - mesa-7.7_rc2 > > - xf86-video-ati-9999 (latest git everytime) > > - KDE-4.3.4 with compositing enabled (OpenGL) > > > > The errors occours after a while of normal desktop work. I haven't tested > > without KMS or compisiting. Will do this as well. > > It's KMS related but not to compositing. Without KMS the errors don't occur. I > found at least two log entries where the error occurred on initializing KMS. > It happens reliable after a while working with X. > > regards, > Johannes >
Can you give me the full reference of your motherboard ?
Cheers, Jerome
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