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" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/806032/+attachment/4599404/+files/dmesg.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/806032 Title: Fn + F[89] does not work for controlling brightness on Clevo laptops (B7130, W150HRM) Status in Linux: Fix Released Status in linux package in Ubuntu: Fix Released Bug description: I cannot modify the brightness level through Fn + F[89] 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[89] (brightness up/down). I didn't get any output for the Fn + F[89] events. Link to user guides (which includes images): http://www.clevo.com.tw/en/e-services/download/USRManualOut.asp?model=B7130 IRC log: http://irclogs.ubuntu.com/2011/07/05/%23ubuntu-kernel.html#t15:02 ProblemType: Bug 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 2.6.38.2 Uname: Linux 2.6.38-8-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: VT1812 Analog [VT1812 Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AudioDevicesInUse: 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 Card0.Amixer.info: 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 ProcEnviron: LANGUAGE=nl_NL PATH=(custom, user) LANG=nl_NL.UTF-8 LC_MESSAGES=nl_NL.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=/dev/mapper/sda2_crypt ro splash vt.handoff=7 break=modules,premount,mount RelatedPackageVersions: linux-restricted-modules-2.6.38-8-generic N/A linux-backports-modules-2.6.38-8-generic N/A linux-firmware 1.52 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/27/2010 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: 6.00 dmi.board.asset.tag: Tag 12345 dmi.board.name: B7130 dmi.board.vendor: CLEVO CO. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd08/27/2010:svnCLEVOCO.:pnB7130:pvrNotApplicable:rvnCLEVOCO.:rnB7130:rvrNotApplicable:cvnNoEnclosure:ct9:cvrN/A: dmi.product.name: B7130 dmi.product.version: Not Applicable dmi.sys.vendor: CLEVO CO. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/806032/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
