I had same problem with thinkpad r50e but it looks solved with 8.10 But the dmesg's message :
thinkpad_acpi: CMOS NVRAM (7) and EC (6) do not agree on display brightness level still remains. -- Brightness applet loses sync with screen brightness https://bugs.launchpad.net/bugs/235363 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
