xorg-xbacklight 1.2.0-1 not working on Toshiba Satellite L650D
Submitted by Przemek
Assigned to Xorg Project Team
Description
Created attachment 69633 xbacklight source code which works for my laptop
xorg-xbacklight 1.2.0-1 is not working as expected. With previous version of xorg-xbacklight (1.1.2.3 or so) I could change the backlight of my laptop without any problems. Now when I run xorg-xbacklight nothing happens (no error message, exit status 0).
I have no problem changing backlight using the following methods:
- echo 3 > /sys/class/backlight/acpi_video0/brightness
when run as root (maximum brightness is 7 on my laptop, minimum = 0)
- xrandr --output LVDS --set BACKLIGHT 3
[siema@laptop ~]$ xrandr --verbose | grep -i backlight BACKLIGHT: 3 (0x00000003) range: (0,7)
I downloaded the source for the previous version of xorg-xbacklight from here (it came up when I searched for it with google):
I understand that this is some older version but seems to be working for me. When searching for any differences (apart from those in the source code) I found that it's linked against libXrandr, whereas the newer one is not:
[siema@laptop ~]$ pacman -Q xorg-xbacklight xorg-xbacklight 1.2.0-1
[siema@laptop ~]$ ldd /usr/bin/xbacklight linux-vdso.so.1 (0x00007fff279ff000) libxcb-randr.so.0 => /usr/lib/libxcb-randr.so.0 (0x00007fa824a73000) libxcb-util.so.1 => /usr/lib/libxcb-util.so.1 (0x00007fa82486e000) libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007fa82464f000) libc.so.6 => /usr/lib/libc.so.6 (0x00007fa8242a8000) libXau.so.6 => /usr/lib/libXau.so.6 (0x00007fa8240a4000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007fa823e9e000) /lib/ld-linux-x86-64.so.2 (0x00007fa824c7e000)
The one I build from source code (I did that manually with gcc pkg-config --cflags --libs xrandr x11 xbacklight.c -o xbacklight):
[siema@laptop ~]$ ldd ./xbacklight linux-vdso.so.1 (0x00007fff3d7ff000) libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0x00007fd8911ff000) libX11.so.6 => /usr/lib/libX11.so.6 (0x00007fd890ec6000) libc.so.6 => /usr/lib/libc.so.6 (0x00007fd890b1f000) libXext.so.6 => /usr/lib/libXext.so.6 (0x00007fd89090c000) libXrender.so.1 => /usr/lib/libXrender.so.1 (0x00007fd890701000) libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007fd8904e2000) libdl.so.2 => /usr/lib/libdl.so.2 (0x00007fd8902de000) /lib/ld-linux-x86-64.so.2 (0x00007fd891409000) libXau.so.6 => /usr/lib/libXau.so.6 (0x00007fd8900da000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007fd88fed4000)
I attached the working file in case the one referenced by the link I gave eariler changes.
Additional information:
I'm using ArchLinux with latest updates, and catalyst-12.6-8 (legacy) video driver.
uname -a
Linux laptop 3.6.5-1-ARCH #1 SMP PREEMPT Wed Oct 31 20:57:39 CET 2012 x86_64 GNU/Linux
lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV710 [Mobility Radeon HD 4500/5100 Series]
Xorg -version
X.Org X Server 1.12.4 Release Date: 2012-08-27 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.4.8-1-ARCH x86_64 Current Operating System: Linux laptop 3.6.5-1-ARCH #1 SMP PREEMPT Wed Oct 31 20:57:39 CET 2012 x86_64 Kernel command line: root=/dev/sda5 ro vga=0x323 nomodeset initrd=../initramfs-linux.img BOOT_IMAGE=../vmlinuz-linux Build Date: 27 August 2012 08:04:39AM
Current version of pixman: 0.26.2 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version.
Attachment 69633, "xbacklight source code which works for my laptop":
xbacklight.c