I think I've figured this out. In my BIOS (hit esc and/or f1 repeatedly at boot to get to it), there's an option "Power on Display". It's not visible on the first page; I had to hit page down to bring up the second page.
My laptop was set to "auto-selected", if I switch it to the only other option "LCD+Analog RGB", then I can hot-plug an external display at run time in Linux, regardless of whether I booted with one attached. Note that I still think there's a bug in Linux here: if the ext display is not powered, but still detected, it should power it up. I think Windows gets this right, but I have to confirm that. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/751453 Title: External monitor doesn't work on Toshiba Portege R600 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/751453/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
