Two thing to try if you don't mind editing the source a bit. try them each individually and then together if possible. rebuild and see if any modes work.
1. comment out lines 771-776 of radeon_output.c
2. change the TRUE to FALSE in radeon_modes.c lines 106 and 162
Two thing to try if you don't mind editing the source a bit. try them each individually and then together if possible. rebuild and see if any modes work.
1. comment out lines 771-776 of radeon_output.c
2. change the TRUE to FALSE in radeon_modes.c lines 106 and 162