Bug 15586 (Johnathan)

Summary:	Unable to adjust backlight - Gateway M7315U
Product:	ACPI	Reporter:	John (infynidybusiness1)
Component:	Power-Video	Assignee:	Zhang Rui (rui.zhang)
Status:	CLOSED DUPLICATE
Severity:	high	CC:	acpi-bugzilla, lenb, rui.zhang
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.34-rc1	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	acpidump output of "grep . /proc/acpi/video///*" dmesg

Description John 2010-03-19 20:01:46 UTC

I own a Gateway M7315U laptop. The brightness is always set to maximum and I am unable to adjust it with the function keys. The laptop claims to have an "Intel Cantiga Express" chipset. I run slackware-13.0.

John Tsentsi

Comment 1 Zhang Rui 2010-03-22 08:06:09 UTC

please attach the acpidump of your laptop.
please attach the output of "grep . /proc/acpi/video/*/*/*"
please attach the full dmesg output after boot.

Comment 2 John 2010-03-23 00:17:25 UTC

Created attachment 25646 [details]
acpidump

Comment 3 John 2010-03-23 00:18:39 UTC

Created attachment 25647 [details]
output of "grep . /proc/acpi/video/*/*/*"

Comment 4 John 2010-03-23 00:19:32 UTC

Created attachment 25648 [details]
dmesg

Comment 5 John 2010-03-23 00:29:41 UTC

Hi Zhang,

attached =)

Thank you for your time,
John


(In reply to comment #1)
> please attach the acpidump of your laptop.
> please attach the output of "grep . /proc/acpi/video/*/*/*"
> please attach the full dmesg output after boot.

Comment 6 Zhang Rui 2010-03-23 02:39:30 UTC

can you change the backlight by poking /sys/class/backlight/acpi_video0/brightness?

Comment 7 John 2010-03-23 03:41:33 UTC

I have just tried changing the brightness by poking /sys/class/backlight/acpi_video0/brightness , no luck.

(In reply to comment #6)
> can you change the backlight by poking
> /sys/class/backlight/acpi_video0/brightness?

Comment 8 Zhang Rui 2010-03-23 06:32:05 UTC

This is a duplicate of bug #15204.
let's work on this problem in that bug report.

*** This bug has been marked as a duplicate of bug 15204 ***