https://bugzilla.kernel.org/show_bug.cgi?id=43307
Summary: Brightness control does not work on HP Pavilion
dv6-6b45eo laptop
Product: ACPI
Version: 2.5
Kernel Version: 3.4.0
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: sami.lie...@iki.fi
Regression: No
Created an attachment (id=73432)
--> (https://bugzilla.kernel.org/attachment.cgi?id=73432)
dmesg with acpi.debug_level=39 acpi.debug_layer=0x10000000
Setting display brightness level, either via the hotkeys or via
/sys/class/backlight/acpi_video1/brightness, has no effect.
Booting with acpi_backlight=vendor does not make the hotkeys work (but removes
the device from /sys/class/backlight).
Changing the brightness via /sys/class/backlight/acpi_video1/brightness has
only the result that the new value can after that be read from brightness or
actual_brightness.
Booting with acpi.debug_level=39 acpi.debug_layer=0x10000000 reports finding 11
backlight levels:
[ 45.528981] video-0732 [00] video_init_brightness : found 11 brightness
levels
OTOH dmesg contains this message (this may be related to the fact that this
laptop has dual Intel/Radeon GPUs):
[ 45.529448] video: probe of LNXVIDEO:00 failed with error -5
See attachments:
1) dmesg with acpi.debug_level=39 acpi.debug_layer=0x10000000
2) lspci -vvv output
3) acpidump output
--
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
acpi-bugzilla mailing list
acpi-bugzilla@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
