[SOLVED] kernel26-ck, nvidia-ck and backlight

Larsson · 2011-07-21 23:41:21

Using standard kernel and nvidia I can use nvidia-bl from AUR to manually set the backlight of my laptop. Today I've tried kernel26-ck with the corresponding nvidia-ck and the backlight did no longer work. The nvidia_bl module is not found when using the custom kernel. Is it possible to make backlight work with kernel26-ck and if so, how?

Last edited by Larsson (2011-07-22 11:09:02)

karol · 2011-07-21 23:59:12

It's just a guess, but have you tried https://aur.archlinux.org/packages.php?ID=50749 ?

graysky · 2011-07-22 00:56:06

@karol - good call. The way the PKGBUILD for nvidiabl is written, you need to compile it while booted into kernel26-ck:

MODPATH="$pkgdir/lib/modules/$(uname -r)/kernel/drivers/video/backlight/"

Alternatively, you can modify that line replacing $(uname -r) with kernel26-ck

Last edited by graysky (2011-07-22 01:00:52)

Larsson · 2011-07-22 07:45:34

That was my first thought, but the build fails.

==> Starting build()...
make  -C /lib/modules/2.6.39-ck/build M=/home/rickard/Bin/local/nvidiabl/src/dkms_source_tree modules
make: *** /lib/modules/2.6.39-ck/build: No such file or directory.  Stop.
make: *** [modules] Error 2

Replacing $(uname -r) with kernel26-ck does not make any difference. I think the source needs to be patched so it uses kernel26-ck instead of uname -r. Looking at the makefile in the source they have: KVER := $(shell uname -r)
Although I don't know how to create a patch for it, I will take a look at the wiki and see if I can figure it out.

Ps. Perhaps a nvidiabl-ck package would be something to add to the ck repo, since there are many that uses backlight?

Last edited by Larsson (2011-07-22 07:45:59)

Larsson · 2011-07-22 08:01:18

Edited the source directly and it still did not build. it seems that 2.6.39-ck is correct since that exist on my filesystem. But /lib/modules/2.6.39-ck/build does not.

graysky · 2011-07-22 10:41:45

Larsson wrote:

That was my first thought, but the build fails...

I just built it up on a machine that has the kernel26-ck-core2 packages from the repo with no problems. I'm guessing you don't have the corresponding kernel26-ck-xxx-headers package installed...

$ uname -r
2.6.39-ck

$ pacman -Qq | grep kernel26
kernel26-ck-core2
kernel26-ck-core2-headers

$ makepkg -src
==> Making package: nvidiabl 0.70-1 (Fri Jul 22 06:38:01 EDT 2011)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
  -> Found nvidiabl-0.70-source-only.dkms.tar.gz
==> Validating source files with md5sums...
    nvidiabl-0.70-source-only.dkms.tar.gz ... Passed
==> Extracting Sources...
  -> Extracting nvidiabl-0.70-source-only.dkms.tar.gz with bsdtar
==> Starting build()...
make  -C /lib/modules/2.6.39-ck/build M=/dev/shm/nvidiabl/src/dkms_source_tree modules
make[1]: Entering directory `/usr/src/linux-2.6.39-ck'
  CC [M]  /dev/shm/nvidiabl/src/dkms_source_tree/nvidiabl-module.o
  CC [M]  /dev/shm/nvidiabl/src/dkms_source_tree/nvidiabl-models.o
/dev/shm/nvidiabl/src/dkms_source_tree/nvidiabl-module.c:37:3: warning: #warning USE_BACKLIGHT_SUSPEND [-Wcpp]
  LD [M]  /dev/shm/nvidiabl/src/dkms_source_tree/nvidiabl.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /dev/shm/nvidiabl/src/dkms_source_tree/nvidiabl.mod.o
  LD [M]  /dev/shm/nvidiabl/src/dkms_source_tree/nvidiabl.ko
make[1]: Leaving directory `/usr/src/linux-2.6.39-ck'
==> Entering fakeroot environment...
==> Starting package()...
==> Tidying install...
  -> Purging other files...
  -> Compressing man and info pages...
  -> Stripping unneeded symbols from binaries and libraries...
==> Creating package...
  -> Generating .PKGINFO file...
  -> Adding install file...
  -> Compressing package...
==> Leaving fakeroot environment.
==> Finished making: nvidiabl 0.70-1 (Fri Jul 22 06:38:03 EDT 2011)
==> Cleaning up...

$ ll
total 28K
-rw-r--r-- 1 facade users 5.8K Jul 22 06:38 nvidiabl-0.70-1-x86_64.pkg.tar.xz
-rw-r--r-- 1 facade users  11K Jul 17 16:40 nvidiabl-0.70-source-only.dkms.tar.gz
-rw-r--r-- 1 facade users  424 Jul 15 17:36 nvidiabl.install
-rw-r--r-- 1 facade users 1.1K Jul 18 02:08 PKGBUILD

Last edited by graysky (2011-07-22 10:42:31)

Larsson · 2011-07-22 11:08:40

Facepalm! It works perfect now. Thanks for the help.

Arch Linux

#1 2011-07-21 23:41:21

[SOLVED] kernel26-ck, nvidia-ck and backlight

#2 2011-07-21 23:59:12

Re: [SOLVED] kernel26-ck, nvidia-ck and backlight

#3 2011-07-22 00:56:06

Re: [SOLVED] kernel26-ck, nvidia-ck and backlight

#4 2011-07-22 07:45:34

Re: [SOLVED] kernel26-ck, nvidia-ck and backlight

#5 2011-07-22 08:01:18

Re: [SOLVED] kernel26-ck, nvidia-ck and backlight

#6 2011-07-22 10:41:45

Re: [SOLVED] kernel26-ck, nvidia-ck and backlight

#7 2011-07-22 11:08:40

Re: [SOLVED] kernel26-ck, nvidia-ck and backlight

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