[Bug 41766] radeon lvds panel heavy flickering after opening laptop lid (Mobility Radeon HD 3650)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Oct 16 05:57:42 PDT 2011


https://bugs.freedesktop.org/show_bug.cgi?id=41766

--- Comment #6 from Pasi Kärkkäinen <pasik at iki.fi> 2011-10-16 05:57:42 PDT ---

I just tried Fedora 16 final TC1 (Test Compose 1) which has Linux kernel
3.1.0-0.rc9.git0.0.fc16.x86_64. The same heavy flickering/distortion problem
happens there.

I'll attach new dmesg for 3.1.0-0.rc9.git0.0.fc16.x86_64 and Xorg.0.log. 

The flickering seems to happen on these conditions:
- Laptop starts with LID closed, so BIOS has internal LVDS disabled. The laptop
is in a docking station, so there's only external DVI monitor in use.
- After Linux has started booting, I open the laptop LID, and the internal LVDS
has been turned on on clone mode with the external DVI display - and there's
heavy flickering and distrortion on the internal LVDS display.
- Distortion starts before Xorg is started.
- After logging in to Xorg and running "echo low >
/sys/class/drm/card0/device/power_profile" the distortion stops and the LVDS
display is good/normal again.

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