[Bug 95078] [Bisected] dGPU broken in linux 4.4.7

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95078

            Bug ID: 95078
           Summary: [Bisected] dGPU broken in linux 4.4.7
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: nille.kungen at gmail.com

Kernel 4.4.7 broke support for my second graphics card and with that DRI 3.
In 4.4.7 it gets wrong ID with listproviders, it worked in 4.4.6.

Bad:
xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x76 cap: 0xf, Source Output, Sink Output, Source Offload, Sink
Offload crtcs: 4 outputs: 3 associated providers: 0 name:ARUBA @
pci:0000:00:01.0
Provider 1: id: 0x3f cap: 0x0 crtcs: 0 outputs: 0 associated providers: 0
name:HAINAN @ pci:0000:01:00.0

Good values are 0x4f and 0x86.


Bisect
 git bisect bad | tee -a /root/bisect.log
791b5b0d2d01542a87af4b5f8fb2504ce2d5b352 is the first bad commit
commit 791b5b0d2d01542a87af4b5f8fb2504ce2d5b352
Author: Alex Deucher <alexander.deucher at amd.com>
Date:   Wed Mar 2 11:47:29 2016 -0500

    drm/radeon: disable runtime pm on PX laptops without dGPU power control

    commit e64c952efb8e0c15ae82cec8e455ab4910690ef1 upstream.

    Some PX laptops don't provide an ACPI method to control dGPU power.  On
    those systems, the driver is responsible for handling the dGPU power
    state.  Disable runtime PM on them until support for this is implemented.

    Reviewed-by: Michel Dänzer <michel.daenzer at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>

:040000 040000 ca854413a484531a21c3344a9be531a9656be4ac
7d02c9365298e3d52bc0f1ba1a4481667c27200f M    drivers

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20160423/7e9da062/attachment.html>