At Fri, 08 Aug 2014 09:24:57 -0500, David C. Rankin wrote:

All,

I have the Kernel:/stable/standard/ repo configured (bug testing on backlight control) and today I pulled in the updated kernel:

kernel-desktop-3.15.8-2.1.g258e3b0.x86_64

Every 1-2 seconds the backlight flickers horribly (not related to bug report of backlight keyboard keys not controlling backlight). It makes the laptop unusable.

I booted back into kernel-desktop-3.15.6-2.1.gedc5ddf.x86_64 and all is fine. Does a bug report need to go somewhere? I know this is from Kernel:/stable/standard/, but if this is getting folded into factory, then a bug needs to go somewhere.

Anybody have anything to check? The flicker starts as soon as the kernel is booted, is present during the splash screen and remain unchanged after the display and window managers load -- so it is kernel/module related and not desktop related...

This is on a Toshiba p205d [AMD/ATI] RS690M [Radeon Xpress 1200/1250/1270]. I have never seen backlight flicker before on this laptop and dropping back to 3.15.6 all is fine.

Such a bug is better reported to upstream, e.g. bugzilla.kernel.org. Through a quick look at commits between 3.15.6 and 3.15.8, the suspicious one is the fix be907c8468c9f47882036109ba550cd2748b86a0 drm/radeon: set default bl level to something reasonable You may try to revert this commit. If this doesn't help, you'd need to check via git bisect, at best. In anyway, be prepared to build a kernel by yourself :) Takashi -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org