https://bugzilla.kernel.org/show_bug.cgi?id=57571
Summary: Dell Inspiron N5010: freeze on adjusting brightness
unless acpi_backlight=vendor is specified on boot
Product: ACPI
Version: 2.5
Kernel Version: 3.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Power-Video
AssignedTo: acpi_power-vi...@kernel-bugs.osdl.org
ReportedBy: marwan.t...@gmail.com
Regression: No
When adjusting the display brightness using the keyboard native brightness
adjustment buttons, the laptop freezes totally, and the only way to bring it
back, is to power it down by holding down the power button for 3-4 seconds, and
then power it back up.
The only way around this issue seems to be by adding the kernel boot parameter
acpi_backlight=vendor.
I attached the output of the following commands:
- lspci -nnvvv
- acpidump
- dmesg (after booting with and without acpi_backlight)
If there is any more info or testing you need, just let me know.
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