Giancaldo, there is a report on RS480 in bug 333377, however the difference there is that disabling DRI does not help. If it helps for you, please attach your Xorg.0.log for reference.
Giancaldo, there is a report on RS480 in bug 333377, however the difference there is that disabling DRI does not help. If it helps for you, please attach your Xorg.0.log for reference.