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Bug#928412: marked as done (Backlight doesn't work on Asus EeePC 1215b)

Your message dated Thu, 20 Feb 2025 12:19:58 +0100 (CET)
with message-id <20250220111958.99FC9BE2EE7@eldamar.lan>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #928412,
regarding Backlight doesn't work on Asus EeePC 1215b
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
928412: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=928412
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-image-4.9.0-9-amd64
Version: 4.9.168-1

After updating the kernel from linux-image-4.9.0-8-amd64 to linux-image-4.9.0-9-amd64, the screen backlight on the Asus EeePC 1215b laptop stops working.
I tried to install Debian 9.8 and perform an apt-get upgrade, it did not cause any problems. But then I tried apt-get dist-upgrade and the backlight stopped working. Now, if I load the old kernel, the backlight works correctly again. But with the new kernel it does not work. From here I conclude that the problem is in the kernel, but I am not sure (how can I check this?).
When I try to change the backlight brightness using the keyboard, I see that the indicator in XFCE shows changes, but the backlight still does not turn on.
I tried the clean install Debian 9.9, there the backlight didn't work initially (but in the installer it worked). I also encountered a similar problem in LMDE 3 "Cindy".

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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