Hi Christopher,
thanks for your continued help.
The command
echo 8 /sys/class/backlight/intel_backlight/brightness
does set the brightness to a very low value (basically completely black). This
was done with the acpi_backlight=vendor kernel parameter in use.
Rebooting with just kernel
I have now tested the very latest kernel, version 3.19 rc 1 (from
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-rc1-vivid/), and
backlight control still does not work.
The indicator does pop up and indicates increase and decrease in the
correct way, but the actual backlight level on the
Hi,
I have now gone back and tested kernels back to 2.6.32, the kernel that was
used in Ubuntu when this laptop was released. It seems I remembered
incorrectly, backlight control has never worked properly on this laptop.
Backlight control did not work on any of the kernels I tested. I tested
Hi,
I've tested the new 3.18 kernel
($ uname -a
Linux lina-UL30VT 3.18.0-031800rc4-generic #201411091835 SMP Sun Nov 9 23:36:36
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux)
However, the bug persists. Backlight control does not work.
Furthermore, the touchpad control cannot be turned off with the
(I marked the report as confirmed as per the instructions, even though
the problem seems to be solved).
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Title:
[Asus UX32VD]
Hi,
After updating the BIOS, the backlight control works once more. In fact,
I can now also turn off the backlight completely with the same controls,
which was not possible before. Furthermore, the backlight control is
more fine-grained than before.
It seems that the problem is fixed.
Thanks.
** Attachment added: version
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258898/+files/version
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Public bug reported:
The backlight control on my Asus UL30VT has not worked for quite a
while. It just to work, a few ubuntu versions ago. The backlight control
bubble does show up when the function keys on the laptop are pressed.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package:
** Attachment added: ssdt1.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259275/+files/ssdt1.dat
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** Attachment added: dsdt.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259274/+files/dsdt.dat
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** Attachment added: backlight
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259271/+files/backlight
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** Attachment added: acpi
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259272/+files/acpi
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Title:
** Attachment added: acpidump.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259273/+files/acpidump.txt
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** Attachment added: dsdt.dsl
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259278/+files/dsdt.dsl
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** Attachment added: ssdt2.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259276/+files/ssdt2.dat
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** Attachment added: ssdt3.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259277/+files/ssdt3.dat
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** Attachment added: fwts
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259316/+files/fwts
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Title:
** Attachment added: video
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259318/+files/video
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Title:
** Attachment added: version
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259337/+files/version
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** Attachment added: dmidecode.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259336/+files/dmidecode.log
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** Attachment added: results.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259338/+files/results.log
** Description changed:
The backlight control on my Asus UL30VT has not worked for quite a
- while. It just to work, a few ubuntu versions ago. The backlight
** Attachment added: fwts_method
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+attachment/4259317/+files/fwts_method
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Public bug reported:
After recent updates, the backlight doesn't work after suspend on my
Asus UX32VD laptop. The hotkeys work as far as the Unity graphical
indicator goes, but there is no change in backlight. The hotkeys used to
work, and have worked for the last couple of years.
Backlight is
** Attachment added: output from ls /sys/class/backlight backlight
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258879/+files/backlight.txt
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** Attachment added: ssdt2.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258884/+files/ssdt2.dat
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Output from
$ acpixtract acpidump.txt
Intel ACPI Component Architecture
ACPI Binary Table Extraction Utility version 20140214-64 [Mar 29 2014]
Copyright (c) 2000 - 2014 Intel Corporation
Acpi table [DSDT] - 82426 bytes written to dsdt.dat
Acpi table [SSDT] - 2620 bytes written to ssdt1.dat
Acpi
** Attachment added: ssdt3.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258885/+files/ssdt3.dat
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** Attachment added: dsdt.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258882/+files/dsdt.dat
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** Attachment added: ssdt1.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258883/+files/ssdt1.dat
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** Attachment added: dsdt.dsl
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258886/+files/dsdt.dsl
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** Attachment added: Output from sudo acpidump -o acpidump.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258881/+files/acpidump.txt
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** Attachment added: output from grep -r . /proc/acpi acpi
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258880/+files/acpi.txt
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iasl -d dsdt.dat
Intel ACPI Component Architecture
ASL Optimizing Compiler version 20140214-64 [Mar 29 2014]
Copyright (c) 2000 - 2014 Intel Corporation
Loading Acpi table from file dsdt.dat - Length 00082426 (0141FA)
Acpi table [DSDT] successfully installed and loaded
Pass 1 parse of [DSDT]
** Attachment added: log file from sudo fwts
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/425/+files/results.log
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** Attachment added: output from dmesg | grep 'ACPI: Video' video
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258895/+files/video
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** Attachment added: output from sudo fwts
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258887/+files/fwts.txt
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** Attachment added: output from sudo fwts_method
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258894/+files/fwts_method
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** Attachment added: sudo dmidecode dmidecode.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1391758/+attachment/4258896/+files/dmidecode.log
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