2010/11/6 Prof. Dr. Klaus Kusche <klaus.kusche@xxxxxxxxxxxxxxx>: > On 2010-11-02 08:20, Michel Dänzer wrote: >> >> On Mon, 2010-11-01 at 16:09 +0100, Prof. Dr. Klaus Kusche wrote: >>> >>> On my Dell Precision M6500, backlight power switching does not work, >>> neither by using bl_power in /sys/backlight/... >> >> Please provide the full path of the file you're using. >> >>> nor by using DPMS: >>> * Any changes of bl_power are simply and silently ignored >>> (no effect, except that brightness is set to minimum), >>> although brightness tuning works fine >>> (in other words: Both the generic ACPI BIOS driver and the in-kernel >>> Dell laptop backlight driver can control backlight brightness, >>> but not backlight power). >>> * If DPMS becomes active, the screen contents on the internal display >>> slowly becomes garbled or fades away (so video output drivers >>> seem to be off), but the backlight remains on >>> (which is very bad for battery power). >>> The external screen (on display port) behaves even worse: >>> It enters energy saving mode (backlight off) and immediately wakes up >>> again, continuously cycling the backlight power every few seconds. >>> >>> Another problem which optically looks the same: >>> Zapping the X server (Xorg 1.9.1, radeon 6.13.2) with Ctrl-Alt-Bksp >>> leaves the system in an undefined state: >>> * Similar to DPMS, the display fades away or gets garbled >>> (video output off), but the backlight remains on. >>> * It does not switch to the text console automatically, >>> nor is it possible to switch manually with Ctrl-Alt-Fn. >>> >>> Configuration: >>> * Kernel 2.6.35.7-grsec >>> * Radeon DRM with KMS >>> * Radeon framebuffer with backlight control enabled >>> * The Radeon chip is a JUNIPER 0x1002:0x68A0, >>> the kernel should contain all the microcode needed for it. >>> * The displays are LCD1: INTERNAL_UNIPHY and DFP1: INTERNAL_UNIPHY1 >> >> Please provide the full Xorg.0.log file and dmesg output. > > I've sent the full logs on Nov 2nd. > Did they arrive? > Did they provide any insight? > > Anything else I can do / try / provide? > I have some ideas, but I won't be able to look at this until next week. Alex > Many thanks in advance for your help! > > -- > Prof. Dr. Klaus Kusche > Private address: Rainstraße 9/1, 88316 Isny, Germany > +49 7562 6211377 Klaus.Kusche@xxxxxxxxxxxxxxx http://www.computerix.info > Office address: NTA Isny gGmbH, Seidenstraße 12-35, 88316 Isny, Germany > +49 7562 9707 36 kusche@xxxxxxxxxxx http://www.nta-isny.de > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
