Help... Linux & 7870XT -> Lockup.

[Xio.]

 Spoiler

[ 126.255674] radeon 0000:01:00.0: GPU lockup (current fence id 0x00000000000000c5 last fence id 0x0000000000000184 on ring 3)
[ 126.698579] radeon 0000:01:00.0: ring 0 stalled for more than 72144msec
[ 126.700083] radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000000001 last fence id 0x0000000000000003 on ring 0)
[ 126.756650] radeon 0000:01:00.0: ring 3 stalled for more than 65578msec
[ 126.757306] radeon 0000:01:00.0: GPU lockup (current fence id 0x00000000000000c5 last fence id 0x0000000000000184 on ring 3)
[ 127.200250] radeon 0000:01:00.0: ring 0 stalled for more than 72645msec
[ 127.201720] radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000000001 last fence id 0x0000000000000003 on ring 0)
[ 127.258291] radeon 0000:01:00.0: ring 3 stalled for more than 66079msec
[ 127.259723] radeon 0000:01:00.0: GPU lockup (current fence id 0x00000000000000c5 last fence id 0x0000000000000184 on ring 3)
[ 127.701851] radeon 0000:01:00.0: ring 0 stalled for more than 73146msec
[ 127.702462] radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000000001 last fence id 0x0000000000000003 on ring 0)
[ 127.759914] radeon 0000:01:00.0: ring 3 stalled for more than 66580msec
[ 127.761265] radeon 0000:01:00.0: GPU lockup (current fence id 0x00000000000000c5 last fence id 0x0000000000000184 on ring 3)
[ 128.203483] radeon 0000:01:00.0: ring 0 stalled for more than 73647msec

Solutions? Can't even run a live distro, can't install them either.