Public bug reported:
With linux-image-2.6.38 i have
/sys/devices/virtual/backlight/acpi_video0/ directory, there's a
brightness file, which i can use to control backlight brightness (with
laptop-mode-tools for example). When using 3.0.0-6-generic, there's no
/sys/devices/virtual/backlight directory, and there's no backlight
brightness control. Expected behavior is of course to get that dir back,
to control brightness :)
lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/816095
Title:
(TOSHIBA NB500) After upgrading to linux-image-3.0.0-6-generic
/sys/devices/virtual/backlight dissapears
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