I am having a similar issue on my Dell Precision M90 also in a Dell docking station using a Samsung P2570HD monitor. Fresh install from .iso of 10.04; however, I was having the same problems on 9.04 as well (I skipped over 9.10) With the laptop docked and the lid closed I have the exact same symptoms. I get BIOS, GRUB, Ubuntu splash and then external monitor goes dark when it switches over to login screen (is that the point when x starts?) If I do this in a dark room I can see that at the same time the monitor switches off, the laptop's LCD display turns on. I suspect the problem is with the nvidia proprietary drivers, however, as I have discovered the following:
- everything works perfectly with the nvidia proprietary drivers completely uninstalled, and the monitor connected with either a DVI or VGA cable. - everything works perfectly with the "nvidia accelerated graphics driver (version 96)" installed, and the monitor connected with a VGA cable. - the problem occurs with either "version 173" or "version current" with the VGA cable, and all three versions with the DVI cable. I have not extensively tested this with either VGA or DVI (and obviously my keyboard and mouse) directly connected to the ports in the back of the laptop, although I can do so if desired as I am using USB connections for both. Currently I am running the DVI connection and the graphics drivers disabled, although I certainly would rather use 3d graphics. Workarounds are less than ideal as I have a small desk and am using the Dell monitor stand that holds the docking station and the laptop to save space. Also, using the DVI connection, the Fn-F8 switch ("LCD/CRT") does not work, although I'm not entirely certain that that's a real bug. If you need any specific info about my setup or would like me to test more with the laptop *out* of the dock but with the lid closed just let me know. Unfortunately I suspect that this is likely a nvidia problem. If I do need 3d acceleration I can use the VGA connection with the version 96 driver, but video quality is markedly better with DVI so I really wish that that worked... -- Dell Laptop - external display goes blank when using docking station https://bugs.launchpad.net/bugs/489991 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs