Bug 61875 - drm of kernel 3.9-rc1 asked for a BIOS upgrade
Summary: drm of kernel 3.9-rc1 asked for a BIOS upgrade
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
Depends on:
Reported: 2013-03-05 22:05 UTC by Toralf Förster
Modified: 2017-07-24 22:58 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

dmesg (99.57 KB, text/plain)
2013-03-05 22:05 UTC, Toralf Förster
no flags Details

Description Toralf Förster 2013-03-05 22:05:58 UTC
Created attachment 75986 [details]

These 3 lines are new at a ThinkPAd w/ integrated intel graphic - compared to current 3.8.2 kernel :
[   13.086383] [drm] Wrong MCH_SSKPD value: 0x16040307
[   13.086385] [drm] This can cause pipe underruns and display issues.
[   13.086386] [drm] Please upgrade your BIOS to fix this.

but I'm unsure whether I shall now force Lenovo for a new BIOS (I do have the latest BIOS installed) or what else happens here - dmesg with dr.debug=0xe is attached
Comment 1 Ben Widawsky 2013-03-06 02:08:44 UTC
Are you having display issues? If not, this isn't the droid you're looking for.
Comment 2 Chris Wilson 2013-03-06 08:57:10 UTC
It's a set of magic that needs to be setup by the BIOS for the hw to work in some corner-cases. It's outside of our control thanks to the design of our hw.

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