[Bug 27106] New: Possibly bad BIOS in Lenovo T500

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=27106

           Summary: Possibly bad BIOS in Lenovo T500
           Product: xorg
           Version: 7.5
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: schmidt at digadd.de
         QAContact: xorg-team at lists.x.org


Created an attachment (id=34103)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=34103)
Patch to detect Lenovo T500 and override pll parameters

Commit 86cb2bbfda2cf402aee46779ee90bbb7d915482b drm/radeon/kms: use lcd pll
limits when available from drm-radeon-testing git breaks on Lenovo T500 laptop.
Immediately on KMS init the screen goes white with colored lines, then fades to
black.

BIOS reports 45000/60000 for LCD min/max, while normal min/max is 90000/120000.
Forcing the normal values over the lcd values makes things work.


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