the output is by command below: startx >& output the output is unlimited, because it prints messages below forever: (EE) R128(0): Idle timed out, resetting engine... (EE) R128(0): R128CCEWaitForIdle: CCE stop -9 (EE) R128(0): R128CCEWaitForIdle: CCE start -9 (EE) R128(0): R128CCEWaitForIdle: CCE idle -9 (EE) R128(0): Idle timed out, resetting engine... it hangs and I have to shutdown. other distro can use my display card. maybe I shall dump debian