http://bugzilla.kernel.org/show_bug.cgi?id=9995
Summary: 2.6.25-rc1 regression - IBM ACPI backlight controlls do
not work
Product: ACPI
Version: 2.5
KernelVersion: 2.6.25-rc1
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: BIOS
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version: 2.6.24
Earliest failing kernel version: 2.6.25-rc1
Distribution: Ubuntu/Hardy
Hardware Environment: ThinkPad T61
Software Environment: n/a
Problem Description: /sys/class/backlight/acpi_video0 does not control
backlight, nothing happens if I change brightness.
Steps to reproduce: echo {15,5,0} > /sys/class/backlight/acpi_video0/brightness
nothing happens.
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