Am 07.09.2010 16:52, wrote Alex Deucher: > 2010/9/7 Marius Gr?ger<marius.groeger at googlemail.com>: >> Hi All, >> >> I'm not able to use interlace modes (r600 KMS from d-r-t, HDMI output, Xorg >> stack on xorg-edgers, Ubuntu lucid). All interlace modes which are defined >> in EDID seem to be pruned and don't appear in xrandr. Manually adding a mode >> using xrandr does work, and the TV set detects the mode, but the image shows >> horizontal lines. No crash though. >> >> Interlace modes did use to work fine in the past, but I don't know when they >> ceased to function. >> >> What is the status of interlace modes on this kind of setup? What more tests >> or logs would be helpful to analyze the problem? What are other people's >> experiences with this? > > This isn't a driver bug as far as I can tell. At some point the > Xserver started purging interlaced modes. See this bug: > https://bugs.freedesktop.org/show_bug.cgi?id=29591
Thanks for the pointer. I did look into the xserver sources a bit and while I'm far from understanding exactly what's going on, it seems like the server is relying on output->interlaceAllowed and output->doubleScanAllowed. Aren't these bools in the domain of the display driver (granted, this wouldn't be the radeon module but the xf86-video-ati driver)? Also, as I wrote, the purging seems to be half-done, since I am able to manually add an interlaced mode. But since that mode doesn't work properly - does the radeon module support interlaced modes? Is there a non-X way to verify this? Regards Marius
