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Message #22143
[Bug 1218547] Re: Clevo W350ST brightness keys don't work on Kubuntu
The next step that I'd like to take here is to look at what is in
"/sys/class/backlight", both without using the boot param
"acpi_backlight=vendor" and with it . To see what we might need to do in
order to get one backlight interface working, we need to know what
others exist. Without the boot param, I'd expect that we'd see
intel_backlight, possibly an nvidia brightness, and acpi_video0. With
the boot param, acpi_video0 should be replaced with a vendor specific
backlight.
Another quick thing that would be very helpful in guiding us to the root
of the problem is to try running the following as root "/bin/echo 0 >
/sys/class/backlight/intel_backlight/brightness" this will possibly
cause acpi_video0 to function properly, and therefore the brightness
keys should also function as expected. If this fixes the issue, it will
need to be reentered after a shutdown or a wake from suspend, but I
think there is an upstart script somewhere that could be tweaked to do
that.
Also, as a last thought for right now, what version of either nouveau or
the proprietary nvidia drivers are you using?
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https://bugs.launchpad.net/bugs/1218547
Title:
Clevo W350ST brightness keys don't work on Kubuntu
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
The Fn+F8 and Fn+F9 keys are not working on my Clevo W350ST with
Kubuntu Raring to change screen brightness of the internal laptop
screen. I installed linux-headers-3.11.0-4, linux-
headers-3.11.0-4-generic, linux-image-3.11.0-4-generic and linux-
image-extra-3.11.0-4-generic from Saucy packages repository but the
problem persists.
When trying:
$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), .*$/keycode \2 = \3, state = \1/p'
keycode 36 = (keysym 0xff0d, Return), state = 0x10
keycode 232 = (keysym 0x1008ff03, XF86MonBrightnessDown), state = 0x10
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x10
Event codes appear correctly.
And changing:
/sys/class/backlight/intel_backlight/brightness
changes the brightness of the screen, but pressing the key combination
does not. I believe this happens because the key combination is, in
fact, changing the value of
/sys/class/backlight/acpi_video0/brightness
I have
http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu
http://ppa.launchpad.net/bumblebee/stable/ubuntu
in my package sources
Thanks!
---
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: silvio 2689 F.... pulseaudio
/dev/snd/pcmC1D0p: silvio 2689 F...m pulseaudio
/dev/snd/controlC0: silvio 2689 F.... pulseaudio
DistroRelease: Ubuntu 13.04
HibernationDevice: RESUME=UUID=58f7acf2-4914-4b11-a2ac-e641cb4b39fd
InstallationDate: Installed on 2013-08-18 (57 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Notebook W350STQ/W370ST
MarkForUpload: True
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-9-generic root=UUID=f0bca002-701a-49bb-befc-7343bac2e245 ro locale=pt_BR quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2
RelatedPackageVersions:
linux-restricted-modules-3.11.0-9-generic N/A
linux-backports-modules-3.11.0-9-generic N/A
linux-firmware 1.106
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: raring
Uname: Linux 3.11.0-9-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo vboxusers
dmi.bios.date: 04/11/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: Tag 12345
dmi.board.name: W350STQ/W370ST
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: Notebook
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd04/11/2013:svnNotebook:pnW350STQ/W370ST:pvrNotApplicable:rvnNotebook:rnW350STQ/W370ST:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
dmi.product.name: W350STQ/W370ST
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook
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