http://bugzilla.kernel.org/show_bug.cgi?id=15204
Summary: Flag this message Cannot change laptop lcd brightness,
debug output attached.
Product: ACPI
Version: 2.5
Kernel Version: 2.6.32.7
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: acpi_power-vi...@kernel-bugs.osdl.org
ReportedBy: infynidybusine...@yahoo.com
Regression: No
Created an attachment (id=24844)
--> (http://bugzilla.kernel.org/attachment.cgi?id=24844)
acpidump
Dear experts,
I have come across an unpleasant issue. I use a Gateway m7315u laptop for work
and I cannot change the brightness using the function keys. I have tried to
manually write to "/sys/devices/virtual/backlight/acpi_video0/brightness", no
luck. It seems the values within the brightness file change, however there is
no effect on the lcd. If anyone can propose a solution, or even point me in the
right direction, that would be much appreciated. If any other debug information
is needed, I will gladly accommodate that request.
Best,
John
Kernels tried: 2.6.29.6, 2.6.32.7
OS: Slackware 13.0
Attachments provided: lspci -vv, acpidump, dmesg -s64000, acpitest, interrupts.
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