On Fri, 22 Aug 2014, Bertrik Sikken <bertrik@xxxxxxxxx> wrote: > On 19-8-2014 3:29, Jani Nikula wrote: >> On Tue, 19 Aug 2014, Bertrik Sikken <bertrik@xxxxxxxxx> wrote: >>>> On Sun, 17 Aug 2014, Bertrik Sikken <bertrik@xxxxxxxxx> wrote: >>>>> On 15-8-2014 3:43, Jani Nikula wrote: >>>>>> On Thu, 14 Aug 2014, Bertrik Sikken <bertrik@xxxxxxxxx> wrote: >>>>> >>>>>>> Attached is dmesg output from booting kernel 3.14-2 (debian unstable) >>>>>>> with drm.debug=0xe and the samsung_laptop module enabled, from my >>>>>>> Samsung N150plus netbook. >>>>>> >>>>>> Have you tried 3.15? >>>>> >>>>> I've built the v3.15 kernel (using the .config file from debian >>>>> unstable and doing make oldconfig). >>>>> >>>>> The backlight is at maximum brightness after boot and I can't control >>>>> it using the backlight buttons, nor by writing to >>>>> /sys/class/backlight/samsung/brightness >>>>> (say half the value or 1/10th of max_brightness) >>>>> >>>>> Backlight does work when writing >>>>> /sys/class/backlight/intel_backlight/brightness >>>> >>>> How about disabling samsung backlight module with 3.15? >>> >>> I'm not sure what you mean by that. >>> >>> As I understand it, there are three ways to control the backlight on this >>> netbook: using intel_backlight, samsung_laptop (using a "sabi" interface) >>> and acpi_video. >>> Backlight control using the samsung_laptop driver no longer seems to work >>> after the change. If I disable it (e.g. by blacklisting it), I expect it >>> to no longer work at all obviously. >>> >>> What do you want me to test exactly? >> >> If the intel_backlight interface works in 3.15, I presume the problem is >> that you have a non-functional samsung backlight interface that is >> preferred over intel_backlight by your userspace. > > I tested the intel_backlight interface in linux v3.15 with the samsung > backlight module blacklisted. The intel_backlight interface still works. I read that as, "I no longer have problems with backlight". Jani. > > Regards, > Bertrik -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
