A customer of mine gave me his old notebook because he bought a new one.
The laptop is running an p to date Xubuntu 13.10 64bit. Now I'm
suffering similar issue with brightness control: when I press the
appropriate keys on keyboard the slide appears on the upper right corner
of the screen but even if it changes the setting has no effect on the
system . The notebook I have has an Intel X3100 integrated video
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
Integrated Graphics Controller (primary) (rev 0c)
I tried different combinations on grub but no one resolved the issue.
Problem is I have not intel_backlight on /sys/class/backlight folder but
just acpi_video0 or dell_backlight (if I set acpi_backlight=vendor on
grub).
------------------
effe@Vostro1310:/sys/class/backlight$ for i in /sys/class/backlight/*; do echo
-e "\n $i"; cat $i/{brightness,max_brightness,actual_brightness}; done
/sys/class/backlight/dell_backlight
1
7
1
------------------
If I increase the backlight the files are correctly updated:
------------------
/sys/class/backlight/dell_backlight
7
7
7
------------------
acpi_listen works just on new mainline kernel 3.13.2 (tried bot generic and
lowlatency) on stock kernel there isn't output at all:
video/brightnessup BRTUP 00000086 00000000 K
video/brightnessup BRTUP 00000086 00000000 K
video/brightnessup BRTUP 00000086 00000000 K
video/brightnessdown BRTDN 00000087 00000000 K
video/brightnessdown BRTDN 00000087 00000000 K
video/brightnessdown BRTDN 00000087 00000000 K
Now I'm using xrandr to change the brightness:
effe@Vostro1310:/sys/class/backlight$ xrandr --output LVDS1 --brightness
0.5
What can I try to triage the issue?
Thanks.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1261853
Title:
8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen
backlight
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1261853/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
