[Dell Vostro 5470] Unable to control brightness with the Intel GPU / nVidia GPU + proprietary driver
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Invalid
|
Undecided
|
Unassigned | ||
Trusty |
Invalid
|
Medium
|
Edward Lin | ||
Utopic |
Invalid
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Invalid
|
Medium
|
Edward Lin |
Bug Description
CID: 201307-14038 Dell Vostro 5470
The brightness cannot be adjusted when running on Intel GPU
This bug is similar to bug 1332437, but this one is a I+N system
Steps:
1. Install 14.04 + update (3.13.0-29), boot to desktop
2. Try to adjust the screen brightness with hotkeys and "Brightness and Lock" applet
Expected result:
* Screen brightness could be adjusted in both ways.
Actual result:
* Unable to control screen brightness, the brightness indicator would change according to key press on the hotkeys
Debugging information:
ubuntu@
acpi_video0 intel_backlight
ubuntu@
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
/proc/acpi/
ubuntu@
[ 4.106881] ACPI: Video Device [PEGP] (multi-head: no rom: yes post: no)
[ 4.121059] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CRDA:
country TW:
(2402 - 2472 @ 40), (3, 27)
(5270 - 5330 @ 40), (3, 17), DFS
(5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Tue Jun 24 06:08:39 2014
HibernationDevice: RESUME=
InstallationDate: Installed on 2010-01-01 (1635 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Vostro 5470
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.127.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/02/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: Vostro 5470
dmi.sys.vendor: Dell Inc.
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu): | |
assignee: | Anthony Wong (anthonywong) → Edward Lin (airken) |
The brightness control still not working with the proprietary driver installed. 201307- 14038:/ sys/devices/ pnp0$ /usr/lib/ nux/unity_ support_ test -c -p
ubuntu@
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GT 740M/PCIe/SSE2
OpenGL version string: 4.4.0 NVIDIA 331.38
Not software rendered: yes
Not blacklisted: yes
GLX fbconfig: yes
GLX texture from pixmap: yes
GL npot or rect textures: yes
Compiz supported: yes