Can not control brightness on Thinkpad P51
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
I can not modify the screen brightness in Ubuntu 17.10. Controls aside, the classes in `proc` are either not available or non-functional depending on what arguments I provide in GRUB_CMDLINE_
On a parallel installation (Ubuntu 16.04.3), brightness control works flawlessly.
System Information
------------------
$ lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10
$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 05)
00:08.0 System peripheral: Intel Corporation Skylake Gaussian Mixture Model
00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-H Thermal subsystem (rev 31)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-H Serial IO I2C Controller #0 (rev 31)
00:16.0 Communication controller: Intel Corporation Sunrise Point-H CSME HECI #1 (rev 31)
00:17.0 SATA controller: Intel Corporation Sunrise Point-H SATA controller [AHCI mode] (rev 31)
00:1b.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Root Port #17 (rev f1)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #3 (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #5 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #9 (rev f1)
00:1d.4 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #13 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-H LPC Controller (rev 31)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-H PMC (rev 31)
00:1f.3 Audio device: Intel Corporation Device a171 (rev 31)
00:1f.4 SMBus: Intel Corporation Sunrise Point-H SMBus (rev 31)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (5) I219-V (rev 31)
01:00.0 VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro M1200 Mobile] (rev a2)
01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)
02:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM961/PM961
04:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
3e:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM961/PM961
# with GRUB_CMDLINE_
$ grep . -R /sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
grep: /sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
grep: warning: /sys/class/
/sys/class/
/sys/class/
grep: /sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
/sys/class/
3f:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
---
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC0D0p: mhoff 2207 F...m pulseaudio
/dev/snd/
/dev/snd/
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 17.10
HibernationDevice: RESUME=
InstallationDate: Installed on 2017-11-11 (86 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: LENOVO 20HJS27B00
NonfreeKernelMo
Package: linux (not installed)
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
linux-firmware 1.169.2
Tags: artful
Uname: Linux 4.13.0-32-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip disk libvirt lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/24/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1UET37W (1.11 )
dmi.board.
dmi.board.name: 20HJS27B00
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.family: ThinkPad P51
dmi.product.name: 20HJS27B00
dmi.product.
dmi.sys.vendor: LENOVO
affects: | ubuntu → linux (Ubuntu) |
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https:/ /wiki.ubuntu. com/Bugs/ FindRightPackag e. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.
To change the source package that this bug is filed about visit https:/ /bugs.launchpad .net/ubuntu/ +bug/1747273/ +editstatus and add the package name in the text box next to the word Package.
[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]