Bugzilla – Bug 620439
radeon [HD 2600 XT] externel monitor does not work with kernel modesetting
Last modified: 2012-03-03 19:12:32 UTC
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; de; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6 I have to boot with nomodeset in order to make my external monitor display anything. Otherwise it simply stays dark. Curiously the external monitor is recognized correctly even with kernel modesetting - and it can be configured comfortably under KDE. However it simply stays dark no matter what you do. This is not only to be observed with Xorg but also the same for the text consoles vt01-vt05 (ext. monitor also dark here). However as soon as you boot with nomodeset, the text consoles use both monitors in clone mode and there is no problem with Xorg. (During kernel initialization there are always both monitors up no matter whether you use nomodeset). Tested with both kernels(2.6.34-12.1 & -9.3) of RC1 and RC2. For both it is utterly the same play (tested extensively). Reproducible: Always
Still the same with 2.6.34.7-0.5-desktop. Somehow really annoying since the nomodeset option is causing many other problems like hangs on switching the video mode or xrandr configuration blackouts. I have tested it with different games and manually: without the nomodeset kernel options radeon has no problems in setting the video mode whereas with I do always get a really annoying hang.
Work in progress (2.6.36.1-1) but still far from working as it should. Now external monitors are kept in function until runlevel 3 but Xorg still fails to initialize my ext. mon. garbling my integrated monitor with pixel soup so that X11 still can not be used with modesetting (and only very infringed without - think of the crashes on switching video mode as indulged by almost all games.)
hwinfo --gfxcard?
Created attachment 405310 [details] hwinfo --gfxcard Oi, I would have almost missed you; the post-notification must have somewhere vanished in the bit-nirvana.
retested with desktop-2.6.37-6.99.7.0926a18 suse/vanilla: Things seem a bit different with the vanilla kernel. I did not have pixel soup with vanilla except once as the last two times with the Suse-kernel. Upstream bug: https://bugzilla.kernel.org/show_bug.cgi?id=25052 related Xorg bug: https://bugs.freedesktop.org/show_bug.cgi?id=32466
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resolved. Alex Deucher`s patch also works well with the openSUSE kernel.
Test results (Comment #7) were wrong by accident: modules did not get shipped in first place. Reopened.
Should be resolved in 11.4, right?
Closing due to lack of response.
Works well with openSUSE 12.1 - and the 3D experience with the new radeon driver is real joy!