I just tried a Dell 3007WFP-HC (30" - 2560x1600 native) at my Radeon X1950XTX as it should be able to drive 2 of them (2x Dual-Link-DVI) but the system doesn't boot. After unplugging it again and attaching a standard CRT as I had before the system booted again as before. System: - Kubuntu 9.10 - Karmic Koala - Gigabyte GA-MA785GM-US2H motherboard - AMD Athlon(tm) II X4 620 Quad-Core - 4GB DDR2 - ATI Radeon X1950XTX PEG With the big Dell monitor the system comes up into grub as usual but then the display just stays blank (but not off) and the system doesn't proceed booting. No ssh but CTRL+ALT+DEL can be used to reboot. Maintenance shells are working correctly (in terms of display).
Created attachment 31757 [details] /var/log/syslog The last lines of the working system with the old CRT's (dual-headed).
Created attachment 31758 [details] /var/log/syslog This is the first boot of the system with the big Dell 30" LCD.
No Xorg log is being started with the big Dell. Currently the system boots with a Radeon HD4770 (RV740) without problems and I'm successfully using an HD2400PRO with such a monitor at work even with kwin desktop effects (although the cube is not yet available).
Can you boot the system with another monitor then switch to the once the system is booted? I'm inclined to say this is a kernel issue.
(In reply to comment #4) > Can you boot the system with another monitor then switch to the once the system > is booted? I'm inclined to say this is a kernel issue. > *switch to the Dell
(In reply to comment #5) > (In reply to comment #4) > > Can you boot the system with another monitor then switch to the once the system > > is booted? I'm inclined to say this is a kernel issue. > > > > *switch to the Dell > I just booted with one of the CRTs again: - log in - plug off the CRT - plug in the Dell - xrandr --output DVI-0 --mode 2560x1600 Voila, the big Dell works perfectly. Additionally I noticed that when I boot with the Dell monitor plugged in and the hang occurs I just plug it off and the boot continues. This is somewhat odd to me. Is it waiting for the monitor to be plugged off? Should I try with the new 2.6.32 kernel instead of the karmic one? I'm successfully running that on another machine at work with another Dell 30" monitor.
Just tried with the vanilla 2.6.32 kernel with the exact same result. Doesn't matter if I use the radeon driver from xorg-edgers ppa or the official karmic one either. So I think it might be a bug in the kernel itself as alex said. I'll close this bug as WONTFIX since the radeon driver seems to do all things fine once the system is up and running.
Filed it (as it seems to me that the problem was introduced by a package-update) here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/493834
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.