Public bug reported:
Hello,
I have the problem that I cannot control the screen brightness on my XPS
15 9560 notebook.
/sys/class/backlight is empty. I'm running latest Dell BIOS firmware
1.9.4. I tried all kinds of kernel parameters, such as acpi_osi and
acpi_backlight, but without any effect. I'm running with Intel graphics
card in UEFI mode.
kern.log attached.
root@eris:/etc/default# uname -a
Linux eris 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64
x86_64 x86_64 GNU/Linux
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: chaotic
** Attachment added: "kern.log"
https://bugs.launchpad.net/bugs/1767504/+attachment/5128912/+files/kern.log
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https://bugs.launchpad.net/bugs/1767504
Title:
Dell XPS 15 9560 - No brightness control
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