Using the -r1-noblpatch kernel (the clean one), I get a shortened "range" i.e. I can use ~30%-70% but accessing values outside that range causes flickering (using gnome3 and the Fn+F7/F8 keys). This seems to be dependent on the value of /sys/class/backlight/acpi_video0/brightness
I manually incremented /sys/class/backlight/acpi_video0/brightness in sets of ten (initially one by one) and no new messages appeared in dmesg, apart from one more of the thinkpad_acpi ones that is also at the base of the previous upload. The brightness changed fine using this method. "cat /sys/class/backlight/acpi_video0/max_brightness" returns 100. Using previous kernels (anything >=3.7) I would get exactly the behaviour described in the bug report (unable to shift below ~90%). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1098216 Title: Regression in brightness control on Lenovo Thinkpad X230 and X1 Carbon To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1098216/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
