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[Bug 806032] Re: Fn + F does not work for controlling brightness on Clevo laptops (B7130, W150HRM)
I'm not sure if this is still / again the same problem, but I have a
very similar issue on a recently bought Clevo P650RA laptop, running
Ubuntu Xenial / 16.04 and the similar bug search when reporting a new
bug led me to this issue.
The brightness keys do not work; setting the brightness manually through
/sys/class/backlight/intel_backlight works fine.
Probably related: in the BIOS I can select either MSHYBRID or DISCRETE
for the GPU, meaning either Optimus-like-technology or DISCRETE only.
When using DISCRETE, the brightness keys do work. However, in that case
I'm forced to use the Nouveau driver since the nvidia driver will not
work anymore. And the nouveau driver makes this laptop crash after a
short while, so it's not really a viable alternative.
When running in MSHYBRID, maybe there are more possible connected
devices making this bug appear?
There's also some ACPI Warnings in DMESG that may be related. I'll
attach the output of dmesg to this message.
Please let me know if I should report a new bug rather than necroposting
in this old bug that appears to be resolved long ago. I'd be happy to
provide more information if you point me in the right direction for
obtaining that information.
** Attachment added: "dmesg.txt showing some ACPI warnings that may be related"
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Fn + F does not work for controlling brightness on Clevo laptops
Status in Linux:
Status in linux package in Ubuntu:
I cannot modify the brightness level through Fn + F keys even if I
can control it through `/sys/class/backlight/acpi_video0` or the Power
management applet in KDE.
I followed the instructions on https://wiki.ubuntu.com/Hotkeys/Troubleshooting without luck
I've already tried `xev`, `udevadm monitor`, looking in dmesg and /var/log/kern.log, using /lib/udev/keymap for monitoring keyboard input.
Per suggestion by apw in #ubuntu-kernel, I installed input-utils and
ran `sudo lsinput` to get a list of devices. On each device, I did
`sudo input-events -t 10 $number` to watch for events. Each time I
pressed a regular key ("c"), another Fn key (Fn + F6 / Volume Up) and
Fn + F (brightness up/down). I didn't get any output for the Fn +
Link to user guides (which includes images):
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 220.127.116.11
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: VT1812 Analog [VT1812 Analog]
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
USER PID ACCESS COMMAND
/dev/snd/controlC0: peter 21076 F.... pulseaudio
/dev/snd/pcmC0D0p: peter 21076 F...m pulseaudio
CRDA: Error: [Errno 2] Bestand of map bestaat niet
Card hw:0 'Intel'/'HDA Intel at 0xfd800000 irq 50'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:11060448,15587130,00100000 HDA:80862804,15587130,00100000'
Controls : 29
Simple ctrls : 14
Date: Tue Jul 5 17:55:27 2011
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426.3)
MachineType: CLEVO CO. B7130
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=/dev/mapper/sda2_crypt ro splash vt.handoff=7 break=modules,premount,mount
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.vendor: Phoenix Technologies LTD
dmi.board.asset.tag: Tag 12345
dmi.board.vendor: CLEVO CO.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.vendor: No Enclosure
dmi.product.version: Not Applicable
dmi.sys.vendor: CLEVO CO.
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