Christopher,
thanks for your support, but I believe that this is a very well
documented issue with remedies like typing echo 0
/sys/class/backlight/intel_backlight/brightness on the command line
solves.
The big issue is that after the computer resumes from suspend, the
brightness go 100% and
Bug is back on 3.14.0.
From 3.8.0 to 3.13.7 it was ok, now it is back. So please anyone help.
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Title:
8086:0166 [Dell XPS 13 L322X]
c0h1b4, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please read the
3.8.0-31-generic (don't know if it was before) solve the problem for me
too, even with removing the fix described at #90
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Title:
This seems to be fixed for me now as well.
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Title:
8086:0166 [Dell XPS 13 L322X] backlight stopped working after update
@Christopher M. Penalvch
Why did you remove the l322x 1080p tags? Didn't you see Adrian Patracu's report
is for this very machine, what Kamal confirms in post #2. I added the l322x tag
to clarify between backlight issues confusion with the l321x, because these 2
machines are called xps13 by
Bib, , if you have a bug in Ubuntu, the Ubuntu Kernel team, Ubuntu Bug Control
team, and Ubuntu Bug Squad would like you to please file a new report by
executing the following in a terminal while booted into a Ubuntu repository
kernel (not a mainline one) via:
ubuntu-bug linux
For more on
*** This bug is a duplicate of bug 1163720 ***
https://bugs.launchpad.net/bugs/1163720
** This bug has been marked a duplicate of bug 1163720
Brightness control broken on XPS13 with 3.8.0-16 and 3.8.0-22
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*** This bug is a duplicate of bug 1163720 ***
https://bugs.launchpad.net/bugs/1163720
Bib, the rule is one bug per hardware (even if everything indicates that
it is the same issue) :-)
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*** This bug is a duplicate of bug 1163720 ***
https://bugs.launchpad.net/bugs/1163720
3.8.0-30-44 fixed my backlight. Has been working fine since. I have the
1080p dell xps 13 (L322x). I'm using xUbuntu. How can I check if I have
UEFI boot?
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** This bug is no longer a duplicate of bug 1163720
Brightness control broken on XPS13 with 3.8.0-16 and 3.8.0-22
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Title:
Still work in 3.8.0-31-generic x86_64 A09 BIOS mode
** Tags added: l322x
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Title:
8086:0166 [Dell XPS 13 L322X] backlight stopped
*** This bug is a duplicate of bug 1163720 ***
https://bugs.launchpad.net/bugs/1163720
** This bug has been marked a duplicate of bug 1163720
Brightness control broken on XPS13 with 3.8.0-16 and 3.8.0-22
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*** This bug is a duplicate of bug 1163720 ***
https://bugs.launchpad.net/bugs/1163720
and still NOT working in 3.8.0-31-generic x86_64 A09 UEFI mode
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** This bug is no longer a duplicate of bug 1163720
Brightness control broken on XPS13 with 3.8.0-16 and 3.8.0-22
** Tags removed: 1080p l322x
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there's an error in my previous report.
- kernel 3.8.0-29 : everything ok, brightness is adjustable, with
CTRL+F4/F5 or via a XFCE widget
- kernel 3.8.0-30 : nothing work, brightness always minimum, CTRL+F4/F5
doesn't work, XFCE widget doesn't work.
My laptop is a Dell XPS 13 with the 1080p
same here on XPS 13
Linux slap 3.8.0-30-generic #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 x86_64
x86_64 x86_64 GNU/Linux
last kernel worked fine, after update brightness always minimum, Fn
F4/F5 does not change luminosity (just shows the progress bar change...)
There's a way to roll back to
... additional info to my previous comment:
after enabling Load Legacy Option Rom in BIOS, backlight is working ok
(also when I use f4/f5 keys).
Bios version A08, model XPS L322X
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I had acpi_backlight=vendor in grub. It works perfectly once I removed
it.
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Title:
8086:0166 [Dell XPS 13 L322X] backlight stopped
The same for me, xps13, full hd, booting from UEFI. Working well with
previous kernel version (3.8.0-29-generic). After updating to the latest
(3.8.0-30-generic) the problem is back again.
martin@flegy-nb:~$ uname -a
Linux flegy-nb 3.8.0-30-generic #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013
** Summary changed:
- XPS13 backlight stopped working after update 3.8.0-18.28
+ 8086:0166 [Dell XPS 13 L322X] backlight stopped working after update
3.8.0-18.28
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