gma500_gfx black LVDS if VGA connected

[Josep Pujadas-Jubany]

Asus 1015CX notebook
Ubuntu 14.04 LTS 32 bit up-to-date

If the notebook is powered on with an external VGA monitor, not video at LVDS. Only 800x600 output foer VGA.

xrandr doesn't work. Impossible to turn on LVDS.

If the notebook is powered on without external VGA monitor, LVDS is correctly configured at 1024x600. In this case, xrandr works. If an external VGA monitor is after connected it can be managed using xrandr. However, no video is showed at VGA monitor until xrandr is used.
---
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: usuari 1653 F.... pulseaudio
 /dev/snd/seq: timidity 1311 F.... timidity
CRDA: Error: [Errno 2] El fitxer o directori no existeix
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=aef78d99-d548-43af-a863-69b6333fede0
InstallationDate: Installed on 2014-08-20 (90 days ago)
InstallationMedia: Lubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2)
MachineType: ASUSTeK COMPUTER INC. 1015CX
Package: linux (not installed)
ProcFB: 0 psbdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic root=UUID=bda82093-d765-4a41-8866-aad74777e105 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-39-generic N/A
 linux-backports-modules-3.13.0-39-generic N/A
 linux-firmware 1.127.8
Tags: trusty
Uname: Linux 3.13.0-39-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

_MarkForUpload: True
dmi.bios.date: 08/09/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1015CX.1101
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: 1015CX
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1015CX.1101:bd08/09/2012:svnASUSTeKCOMPUTERINC.:pn1015CX:pvrx.x:rvnASUSTeKCOMPUTERINC.:rn1015CX:rvrx.xx:cvnASUSTeKCOMPUTERINC.:ct10:cvrx.x:
dmi.product.name: 1015CX
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1393945

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

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[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Josep Pujadas-Jubany (jpujades)]

apport information

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.18 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc5-vivid/

[Josep Pujadas-Jubany (jpujades)]

No 3.18 build for Trusty.

However, I used v3.18-rc5-vivid, as you suggested:

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc5-vivid/linux-headers-3.18.0-031800rc5_3.18.0-031800rc5.201411162035_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc5-vivid/linux-headers-3.18.0-031800rc5-generic_3.18.0-031800rc5.201411162035_i386.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc5-vivid/linux-image-3.18.0-031800rc5-generic_3.18.0-031800rc5.201411162035_i386.deb
sudo dpkg -i linux-headers-3.18*.deb linux-image-3.18*.deb
sudo reboot

LVDS still blank at boot if external VGA plugged.

[Joseph Salisbury (jsalisbury)]

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

[Josep Pujadas-Jubany (jpujades)]

Not sure to find the correct maintainer for gma500_gfx driver at MAINTAINERS [0].

Sent text message to dri-devel [at] lists [dot] freedesktop.org

[1.] gma500_gfx black LVDS if VGA connected

[2.] bugs.launchpad.net/ubuntu/+source/linux/+bug/1393945

[3.] gma500_gfx lvds vga

[4.] 3.18.0-031800rc5-generic

Waiting for response...

[0] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/MAINTAINERS

[Josep Pujadas-Jubany (jpujades)]

https://bugzilla.kernel.org/show_bug.cgi?id=88661