Bugzilla – Bug 680822
openSUSE 11.4 Intel 4500MHD screen brightness slightly dim and not easily changeable
Last modified: 2012-05-24 12:36:50 UTC
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:2.0b12) Gecko/20110222 Firefox/4.0b12 Hi, I have an Acer 4810T laptop with Intel 4500MHD graphics running openSUSE 11.4 KDE. I used to run 11.3 for the full 8 months. There is a new bug introduced with 11.4 that makes the screen brightness be slightly dimmer than maximum. It starts off in the first stage of KMS during the bootup, the lizard splash screen appears full brightness in the wrong resolution, then after a few seconds the screen flashes and the lizard appears again with the correct widescreen resolution. At this point the brightness dims slightly. And it it remains that way all the way into the KDE desktop. This is more irritating because the brightness can not be easily changed due to bug #668694. But I have been using the setpci screen brightness workaround. However it constantly reverts back to the slightly dimmer level. After resuming from DPMS power saving, it reverts to a dimmer level, and the same when resuming from suspend. There is a solution: Install kernel 2.6.38 from the kernel repo, and it behaves the same as the 11.3 kernel which didn't have the bug. Thanks for looking into this. Reproducible: Always
Isn't this just providing more info on bug #668694. Closing as DUPLICATE. Please add this comment to that bug. *** This bug has been marked as a duplicate of bug 668694 ***
Hi, no this is not a duplicate of bug #668964. That bug is about not being able to dim the screen. This bug is about the screen dimming automatically and by default.
It's two symptoms of the same problem. Closing as a dupe. *** This bug has been marked as a duplicate of bug 668694 ***
> Install kernel 2.6.38 from the kernel repo Rui/Matthew: Do you eventually have an idea which patch came in between 2.6.37 and 2.6.38 fixing this (which might even be worth to submit it to stable@)?
Hi Thomas, thanks very much for looking into this. I just wanted to report that this bug is back for 2.6.39 from the openSUSE KERNEL repo. It's just bouncing back and forth between broken and fixed. I maintain that this bug is NOT a duplicate bug 668694.
I am rather busy right now. Our kotd is more or less the mainline kernel. To be sure you can test a -vanilla flavored kernel (without any suse patches) to be sure it's a mainline problem. You could then open a bugzilla.kernel.org bug and pointing to this one for reference. Rui/Mjg should be more aware about recent mainline changes in this area than I am. Best still wait a bit, maybe someone still points you/us to something to try.
Could be related to: [Bug 36322] acer-wmi / Acer Travelmate 5760 not supported https://bugzilla.kernel.org/show_bug.cgi?id=36322
Looks like there is some progress on the mainline bug. The patch is probably not applied yet, as soon as it is and we sync up (we do regularly), it can be tested by installing a kernel from here: http://download.opensuse.org/repositories/Kernel:/vanilla/standard/x86_64 Whether it is going to be pushed is currently discussed in this thread: http://www.mail-archive.com/platform-driver-x86@vger.kernel.org/msg03154.html I'd like to close this one fixed already. I am currently browsing through my bugs and need to get an overview. If the issue is still not resolved, please report to: https://bugzilla.kernel.org in first place. We need the stuff to be fixed in the mainline kernel for maintenance reasons.