I filed a bug report which was marked as a duplicate of this one. I can easily reproduce the problem on my toshiba by running
xset dpms force on In the case of my machine, this causes the backlight to go to max brightness (can also see the bug by blanking the screen via a lid close and then reopen it, and I can cause it by starting a virtual machine. I stop the problem by blacklisting the video module. ie adding a line to /etc/modprobe.d/blacklist This is perhaps the best workaround. I can still adjust brightness via the laptop hotkeys, but no system events changes the backlight level. There are no other adverse affects of blacklisting the module. Now I will investigate the driver recompile option. -- Starting up a virtual machine in a virtualbox changes the display brightness (again) https://bugs.launchpad.net/bugs/241195 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
