thinkpad_acpi unsupported brightness interface


I have a problem since yesterday. I updated the system and since then, I get the message “thinkpad_acpi unsupported brightness interface, please contact” when I boot. I can then hit Ctrl+D and the system boots as read-only.

I tried booting with the options “acpi_osi=Linux acpi_blacklight=vendor” but this did not help.
Kernel: 3.16.7-24-desktop

Any ideas what I could do?


Any ideas? Would be very grateful

You could try the following acpi boot option rather than the others;

acpi_osi=\"!Windows 2012\"