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. 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$ -- Lewis Lewis@xxxxxxxxxxxx 0782 588 4158 -- 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
