dmesg:

[12040.432139] radeon 0000:01:00.0: evergreen_surface_value_conv_check:330 cb
invalid array mode 6
[12040.432144] radeon 0000:01:00.0: evergreen_packet3_check:2098 invalid cmd
stream 595
[12040.432147] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[12040.432256] radeon 0000:01:00.0: evergreen_surface_value_conv_check:330 cb
invalid array mode 6
[12040.432259] radeon 0000:01:00.0: evergreen_packet3_check:2058 invalid cmd
stream
[12040.432261] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[12040.450013] radeon 0000:01:00.0: evergreen_surface_value_conv_check:330 cb
invalid array mode 6
[12040.450019] radeon 0000:01:00.0: evergreen_packet3_check:2098 invalid cmd
stream 595
[12040.450021] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[12040.467709] radeon 0000:01:00.0: evergreen_surface_value_conv_check:330 cb
invalid array mode 6
[12040.467715] radeon 0000:01:00.0: evergreen_packet3_check:2098 invalid cmd
stream 595
[12040.467717] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[12040.480946] radeon 0000:01:00.0: evergreen_surface_value_conv_check:330 cb
invalid array mode 6
[12040.480951] radeon 0000:01:00.0: evergreen_packet3_check:2098 invalid cmd
stream 595