On 05/26/2014 04:42 AM, Lewis Toohey wrote: > On 23 May 2014 13:50, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: >> Hi Lewis et all, >> >> On 05/23/2014 02:07 PM, Lewis Toohey wrote: >>> On 23 May 2014 02:34, Aaron Lu <aaron.lu@xxxxxxxxx> wrote: >>>> On 05/21/2014 09:02 PM, Lewis Toohey wrote: >>>>> Hi Aaron >>>>> >>>>> I followed your instructions and can report some limited success. I >>>>> have two interfaces listed in /sys/class/backlight namely: >>>>> acpi_video0 radeon_bl0 >>>>> >>>>> max_brightness for acpi_video0 is 11. Echo-ing new values to >>>>> brightness appears to have no effect. >>>>> >>>>> max_brightness for radeon_bl0 is 255. Echo-ing new values to >>>>> brightness does adjust the screen brightness as you would expect. >>>>> >>>>> Results are the same on both battery and powered. >>>>> >>>>> I hope that is useful. >>>> >>>> I think Hans' patchset should solve your problem, can you please give it >>>> a try? You will need to pass the video.use_native_backlight=1 to kernel >>>> cmdline when testing, thanks. >>>> >>>> [PATCH resend 0/4] Make video.use_native_backlight=1 work properly with nouveau >>>> http://www.spinics.net/lists/dri-devel/msg59941.html >>>> >>>> -Aaron >>> >>> Aaron >>> >>> Thank you for this. Unfortunately I am going to have to ask you for a >>> bit of help here as I am now, officially, "out of my depth". I >>> appreciate this is a pain as you will have to take time explaining it >>> to me and I apologise for that. >>> >>> I have figured out how to pass the kernel command line argument, this >>> is not an issue. >>> >>> I have located the patch you refer to here: >>> https://bugzilla.redhat.com/attachment.cgi?id=894577 >>> (which I believe is correct) but I cannot figure out how to apply it. >> >> That is not the right patch, you need a set of 2 patches. I've attached >> them to this mail. Note please ignore the numbering starting at 6, these >> are the 2 patches you need. You will need to build a Linux kernel with >> these 2 patches applied, see your distributions documentation on how >> to build a kernel from source. >> >> I don't know which distro you are using, I've a Fedora kernel with this >> patches included available here: >> >> http://people.fedoraproject.org/~jwrdegoede/rhbz1093171/ >> >> Regards, >> >> Hans > > Hans > > Unfortunately I am unable to apply these patches against the latest > mainline kernel. I get two fails when applying the second patch file > and then the kernel will not compile. Please see output information > below. I've prepared a git branch for you: https://github.com/aaronlu/linux.git for-lewis It's based on Rafael's linux-next plus Hans' patch 2 and 3. Thanks, Aaron > > Can you advise? > > Many thanks > > ===APPLYING PATCHES TO LATEST MAINLINE KERNEL==== > > lewis@HappyFunMeaowMeaow:~/KernelTesting/Kernel/linux$ patch -p1 < > 0006-backlight-Add-backlight-device-un-registration-notif.patch > (Stripping trailing CRs from patch; use --binary to disable.) > patching file drivers/video/backlight/backlight.c > (Stripping trailing CRs from patch; use --binary to disable.) > patching file include/linux/backlight.h > lewis@HappyFunMeaowMeaow:~/KernelTesting/Kernel/linux$ patch -p1 < > 0007-acpi-video-Unregister-the-backlight-device-if-a-raw-.patch > (Stripping trailing CRs from patch; use --binary to disable.) > patching file drivers/acpi/video.c > Hunk #1 FAILED at 151. > Hunk #2 succeeded at 161 (offset -1 lines). > Hunk #3 FAILED at 1837. > Hunk #4 succeeded at 1868 (offset -113 lines). > Hunk #5 succeeded at 1999 (offset -113 lines). > Hunk #6 succeeded at 2023 (offset -113 lines). > 2 out of 6 hunks FAILED -- saving rejects to file drivers/acpi/video.c.rej > > > ==LAST LINES OF BUILD BEFORE FAIL=== > > CC [M] fs/xfs/xfs_ioctl32.o > LD [M] fs/xfs/xfs.o > make[1]: Leaving directory `/home/lewis/KernelTesting/Kernel/linux' > make: *** [debian/stamp/build/kernel] Error 2 > lewis@HappyFunMeaowMeaow:~/KernelTesting/Kernel/linux$ > > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
