Now I have a fresh git checkout. The strange version numbering was probably due to the script picking up git tags needing regen from autogen.sh but whatever. It says: (II) RADEONHD: version 1.0.0, built from git branch master, commit e399d165 New problems however (full log attached), first: (WW) RADEONHD(0): DACBSenseCRT: connector type 4 is not supported. (that's VGA on the DMS-59 port numbered "1") Resulting in (I think): (EE) RADEONHD(0): RandR: No valid modes. Disabled. Then after loading xaa and some more it CRASHES: (II) RADEONHD(0): Using ShadowFB Backtrace: 0: /usr/bin/X(xf86SigHandler+0x6d) [0x47e8cd] 1: /lib64/libc.so.6 [0x3951830f30] 2: /usr/bin/X(xf86InitViewport+0x4b) [0x48009b] 3: /usr/bin/X(InitOutput+0xb61) [0x463491] 4: /usr/bin/X(main+0x275) [0x4330c5] 5: /lib64/libc.so.6(__libc_start_main+0xf4) [0x395181e074] 6: /usr/bin/X(FontFileCompleteXLFD+0x259) [0x432579] Fatal server error: Caught signal 11. Server aborting A bit strange, the backtrace does not seem to involve radeonhd at all... I'll try to get debug symbols into this so I can see what happens. Linus