https://bugzilla.kernel.org/show_bug.cgi?id=25052
--- Comment #15 from Elmar Stellnberger estellnb@gmail.com 2011-02-23 20:27:24 --- Unfortunately the tests of Comment #14 were not significant. I have tested the patches with the same kernel but a different Xorg namely xorg-x11-server-7.6_1.9.3-122.1 and xorg-x11-driver-video-7.6-180.1 which however now does resolve UMS for radeon so that everything does again work without any patch and kernel option. With a full KMS kernel like 2.6.38-0.0.12 on the other hand unfortunately video mode initializtion does at me currently not work at all under any configuration: neither with the integrated monitor nor with my external one over any of the ports DVI, HDMI or VGA. Here are the exact results:
VGA: itg: colored vertical lines; ext: c.v.l.(the same), mouse: pixelry HDMI: itg & ext: colored lines; this time brighter with more white, mouse: same DVI: itg: 1st: colored lines; 2nd: sparse colored lines ahead of white bg, ext 1&2: at first 'no signal'-dark then the same as for itg, mouse: same
As the screen output for DVI has differed between two consecutive test runs I presume that there is no substantial difference in the result between different monitors and ports (always vertical colorful lines). The mouse did at first never appear until you moved it into the upper left screen area where there would normally appear an xterm by xinit. From then on the mouse pointer was represented by a rectangular pixel surrogate. Rebooting was the only escape though the system was still reactive (no crash or hang): changing the virtual terminal (chvt) or exiting X from an exit typed into xterm both resulted in a fully blackened screen with no more output.