https://bugs.freedesktop.org/show_bug.cgi?id=44955
Bug #: 44955 Summary: Screen flickers after LVDS turned off and back on with MacBook Pro 8,2 (Radeon HD 6600M) Classification: Unclassified Product: DRI Version: unspecified Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: seth.forshee@canonical.com
Created attachment 55810 --> https://bugs.freedesktop.org/attachment.cgi?id=55810 dmesg output
When the LVDS panel is turned on after being off the screen flickers as if the backlight is quickly alternating between low and high brightness values. The flickering gradually fades until it is no longer noticeable. The graphics card is:
ATI Technologies Inc Whistler [AMD Radeon HD 6600M Series] [1002:6741]
Other than LVDS this machine has a Thunderbolt/MiniDP connector. demsg output and vbios are attached.