Description of problem: Only one CRTC, makes things go boom. restore common restore crtc1 restore pll1 finished PLL1 Program received signal SIGSEGV, Segmentation fault. RADEONInitDispBandwidth2 (pScrn=0x8dc7ea0, info=0x8dc8358, pixel_bytes2=4, mode1=0x0, mode2=0x0) at radeon_display.c:507 507 pix_clk = mode1->Clock/1000.0; Version-Release number of selected component (if applicable): xorg-x11-drv-ati-6.7.192-1.fc8
Not just an RN50 problem, more like a general 1-CRTC problem. Affects Radeon 7200 too.
*** Bug 305921 has been marked as a duplicate of this bug. ***
Upstream reference is https://bugs.freedesktop.org/show_bug.cgi?id=12490
Created attachment 213171 [details] GDB backtrace for driver version 6.7.194
Created attachment 214481 [details] Xorg.0.log for current git snapshot of ATI driver Rebuilding xorg-x11-drv-ati-6.7.194-1.fc8 after replacing the tarball with the current GIT snapshot (which contains corresponding changes by A. Deucher), the X server comes up without crashing. It crashes upon switching to a virtual console but this is still much better than before. The downside is that the X server now ignores the 1400x1050 mode entry in xorg.conf and defaults to 1280x1024 at 85Hz which it didn't do before. After removing the 1400x1050 mode entry from xorg.conf, the X server still defaults to 1280x1024 at 85Hz but at least now, the GNOME display preferences allow the user to change the resolution to 1600x1200 at 75 Hz whereas before, only lower resolutions were present. However, the 1400x1050 mode has disappeared completely. This may be specific to the Fedora version though which features some additional patches which might be relevant.
Created attachment 214491 [details] Xorg.0.log for current git snapshot of ATI driver
The current git tree solves both the X server start-up crash and the VT switch crash. Probably time for an update ..
Issue solved by xorg-x11-drv-ati-6.7.194-3.fc8.
Closing per comment #8.