FS#58392 - [linux-lts] No more screen brightness control with linux-lts 4.14 on Dell XPS 13
Attached to Project:
Arch Linux
Opened by desbma (desbma) - Sunday, 29 April 2018, 13:47 GMT
Last edited by Andreas Radke (AndyRTR) - Wednesday, 02 May 2018, 19:50 GMT
Opened by desbma (desbma) - Sunday, 29 April 2018, 13:47 GMT
Last edited by Andreas Radke (AndyRTR) - Wednesday, 02 May 2018, 19:50 GMT
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Details
Screen brightness control is broken with linux-lts 4.14:
* the FN keys to control brightness do not work anymore (the other FN keys work as usual) * the directory /sys/class/backlight is empty. * xbacklight is unable to get or set current brightness I can reproduce this with: * linux-lts 4.14.35-1 * linux-lts 4.14.36-1 Everything works well when reverting back to linux-lts-4.9.78-1. I'm on a Dell XPS 13 L322X (2nd gen., 2013) laptop. |
This task depends upon
Check "Tip" there and try various possible options. Backlight control may vary over several major kernel updates but usually keeps working in a different way.
@loqs No luck with 4.14.38, same issue.
Contrary to what I said previously, I did not test 4.14.38, only 4.14.37 (4.14.38 was not available yet in my mirror I guess).