Public bug reported:
As the summary states: there is no backlight on my Asus X52Je notebook
after boot - it works fine at the grub stage and splash sreen but
afterwards it just goes black (though you can barely see something -
that's why i could turn on the monitor clone option and use a secondary
display). Function keys work and there is an entrance in
/sys/class/backlight/ - it just doesn't do anything.
I've had this problem since 12.04 - i think it started after one of the
software updates. It did work for quite some time before. I tried
upgrading Ubuntu in hope that that would fix it, but to no avail - I'm
now at 14.04 and all the versions up to this point had the same problem
(12.10, 13.04, 13.10). I also tried latest mainline kernel but that
didn't help.
Also tried some common workarounds, like:
'acpi_backlight=vendor'
'acpi_osi=Linux'
'acpi=off'
And the like, also with no effect.
Also updated BIOS to latest version form manufacturer - didn't help.
The attachements have the required diagnostic files.
Thanks,
mk
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic i686
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: drink 2012 F.... pulseaudio
/dev/snd/controlC0: drink 2012 F.... pulseaudio
/dev/snd/pcmC0D0p: drink 2012 F...m pulseaudio
CurrentDesktop: Unity
Date: Sat May 3 17:37:38 2014
HibernationDevice: RESUME=UUID=517b6655-6f63-483f-80c0-087e4799c881
MachineType: ASUSTeK Computer Inc. K52Je
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic
root=UUID=da0531fa-9dbd-4f69-9179-0dd5b2740f22 ro video.use_native_backlight=1
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127.1
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-24 (9 days ago)
dmi.bios.date: 01/26/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: K52Je.212
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: K52Je
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrK52Je.212:bd01/26/2011:svnASUSTeKComputerInc.:pnK52Je:pvr1.0:rvnASUSTeKComputerInc.:rnK52Je:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: K52Je
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: apport-bug i386 trusty
** Attachment added: "dbug.tar.gz"
https://bugs.launchpad.net/bugs/1315697/+attachment/4104142/+files/dbug.tar.gz
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https://bugs.launchpad.net/bugs/1315697
Title:
Backlight not working after boot
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
As the summary states: there is no backlight on my Asus X52Je notebook
after boot - it works fine at the grub stage and splash sreen but
afterwards it just goes black (though you can barely see something -
that's why i could turn on the monitor clone option and use a
secondary display). Function keys work and there is an entrance in
/sys/class/backlight/ - it just doesn't do anything.
I've had this problem since 12.04 - i think it started after one of
the software updates. It did work for quite some time before. I tried
upgrading Ubuntu in hope that that would fix it, but to no avail - I'm
now at 14.04 and all the versions up to this point had the same
problem (12.10, 13.04, 13.10). I also tried latest mainline kernel but
that didn't help.
Also tried some common workarounds, like:
'acpi_backlight=vendor'
'acpi_osi=Linux'
'acpi=off'
And the like, also with no effect.
Also updated BIOS to latest version form manufacturer - didn't help.
The attachements have the required diagnostic files.
Thanks,
mk
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic i686
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: drink 2012 F.... pulseaudio
/dev/snd/controlC0: drink 2012 F.... pulseaudio
/dev/snd/pcmC0D0p: drink 2012 F...m pulseaudio
CurrentDesktop: Unity
Date: Sat May 3 17:37:38 2014
HibernationDevice: RESUME=UUID=517b6655-6f63-483f-80c0-087e4799c881
MachineType: ASUSTeK Computer Inc. K52Je
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic
root=UUID=da0531fa-9dbd-4f69-9179-0dd5b2740f22 ro video.use_native_backlight=1
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127.1
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-24 (9 days ago)
dmi.bios.date: 01/26/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: K52Je.212
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: K52Je
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrK52Je.212:bd01/26/2011:svnASUSTeKComputerInc.:pnK52Je:pvr1.0:rvnASUSTeKComputerInc.:rnK52Je:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: K52Je
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
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