Update Now running Natty, I again attempted to get an external monitor working via the HDMI port. The "nvidia-settings" tool, it turns out, *does* recognize the external monitor. After some time tinkering with the system, I realized that the problem may be completely different. Specifically, what appears to be wrong is that the keyboard "Fn" key combination for the "switch video mode" key (Fn + F3, on the U460) is not handled correctly by the udev keyboard mechanism (or by something; I'm no expert). With the "/lib/udev/keymap" utility, I was able to see that pressing that key combination results in *two* keycodes: one, 0xDB, interpreted as "leftmeta", and a second, 0x19, interpreted as "p". Holding down "Fn" and repeatedly pressing "F3" results in just one 0xDB at the beginning and then a separate lower-case "p" for each subsequent keypress.
I tried to follow the udev keyboard troubleshooting guide, but nothing I tried made the system respond with anything different. I then found a tool called "disper" (not in the Ubuntu repositories), which allows for screen switching with the NVidia drivers, and with that tool I was successful in getting the laptop to drive the external monitor. Therefore, I don't consider this a problem with the display subsystem at all, at least not in Natty. Note that I'm running the laptop with its BIOS set up to force the NVidia hardware and bypass the Intel hardware. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/624684 Title: [arrandale] Lenovo U460 HDMI doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/624684/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs