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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1767504 Title: Dell XPS 15 9560 - No brightness control Status in linux package in Ubuntu: Confirmed Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1767504/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp