On Mon, Sep 2, 2019 at 7:34 AM Chris Murphy <li...@colorremedies.com> wrote:
> systemd-243~rc2-2.fc31.x86_64 > kernel-5.3.0-0.rc6.git1.1.fc32.x86_64 > > This might be a regression, at least I don't remember this happening > before. I can use the expected keys for built-in display brightness, > and built-in keyboard brightness. But the service unit fails with an > out of the box installation. > > > [chris@fmac ~]$ sudo systemctl status > systemd-backlight@backlight:acpi_video0.service > ● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen > Backlight Brightness of backlight:acpi_video0 > Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; > static; vendor preset: disabled) > Active: failed (Result: exit-code) since Sun 2019-09-01 19:57:37 > MDT; 8min ago > Docs: man:systemd-backlight@.service(8) > Process: 667 ExecStart=/usr/lib/systemd/systemd-backlight load > backlight:acpi_video0 (code=exited, status=1/FAILURE) > Main PID: 667 (code=exited, status=1/FAILURE) > > Sep 01 19:57:37 fmac.local systemd[1]: Starting Load/Save Screen > Backlight Brightness of backlight:acpi_video0... > Sep 01 19:57:37 fmac.local systemd-backlight[667]: Failed to get > backlight or LED device 'backlight:acpi_video0': No such device > Sep 01 19:57:37 fmac.local systemd[1]: > systemd-backlight@backlight:acpi_video0.service: Main process exited, > code=exited, status=1/FAILURE > Sep 01 19:57:37 fmac.local systemd[1]: > systemd-backlight@backlight:acpi_video0.service: Failed with result > 'exit-code'. > Sep 01 19:57:37 fmac.local systemd[1]: Failed to start Load/Save > Screen Backlight Brightness of backlight:acpi_video0. > [chris@fmac ~]$ > > # find /sys -name "*video0*" > /sys/class/video4linux/video0 > /sys/devices/pci0000:00/0000:00:1a.7/usb1/1-2/1-2:1.0/video4linux/video0 > # ls -l /sys/class/backlight/ > total 0 > lrwxrwxrwx. 1 root root 0 Sep 1 19:57 gmux_backlight -> > ../../devices/pnp0/00:03/backlight/gmux_backlight > lrwxrwxrwx. 1 root root 0 Sep 1 19:57 intel_backlight -> > > ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight > Could it be that acpi_backlight is loaded at first, but gets replaced by intel_backlight before systemd could react? -- Mantas Mikulėnas
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