On Thu, 27.03.14 23:41, Thomas Bächler (tho...@archlinux.org) wrote: > On virtually any newer Asus mainboard, the eeepc-wmi driver is loaded. > It exposes a backlight device despite the lack of any physical backlight > devices. This fake backlight device has max_brightness set to 0. Since > the introduction of the clamp_brightness function, systemd-backlight > tries to write '1' to brightness and fails. > > This patch changes systemd-backlight to exit gracefully when > max_brightness is 0 before performing any action. This affects > both the load and save actions.
Humm. To me this appears like the driver is broken. The kernel should not expose a backlight device if there isn't any backend to it? Have you filed a kernel bug? I have changed git now to still print a warning in this case, as we shouldn't silently tape over broken drivers. Lennart -- Lennart Poettering, Red Hat _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel