In case anybody with the same hardware as me comes across this: I'm seeing the same symptoms on a Dell E6410 powered by an nVidia card using the nouveau driver. The workaround described in comment #26 also fixes the problem for me.
In case anybody with the same hardware as me comes across this: I'm seeing the same symptoms on a Dell E6410 powered by an nVidia card using the nouveau driver. The workaround described in comment #26 also fixes the problem for me.