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After upgraded two laptops to 11.10, HDMI and Display ports stopped to work. Symptoms on each (btw. it used to work with 11.04 on both):

  1. laptop Dell Inspiron 1525 (HDMI, Intel GMX 3100):

    • after HDMI cable is plugged in, screen is corrupted (no panel, no icons), system is unresponsive, TV set receives some signal, but only blue screen and some regular ticks can be heard. Unplugging the cable system recovers. No logs were checked.
  2. Thinkpad W510 (DisplayPort, NVidia). Simple "Screens" utility does not recognizes TV set, but this is something to do with the differences between Nvidia driver API and the one expected from the utility, as far I could spot on the net. However, using Nvidia-settings, TV is recognized, but cannot be enabled and used. Beside that, touch pad freezes after HDMI2DisplayPort connector is plugged in the laptop (not immediately, but after few seconds - probably after some handshake with the TV set crashes).

It is strange that no such bug reports can be found on the net. So, I guess it is something wrong on our laptops only, but would appreciate some hints (i.e. any known changes recently related to HDMI, Display Port, X-Windows, kernel... wherever I should take a look and fix the issue).

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Can you be more specific? What do you remove all these entries from xorg.conf? – user37843 Dec 14 '11 at 0:47
This question appears to be abandoned, if you are experiencing a similar issue please ask a new question with details pertaining to your problem. If you feel this question is not abandoned, please flag the question explaining that. :) – James Feb 3 '12 at 1:29

The cause of the problem for Thinkpad W510 is the fact that laptop is usually used in combination with additional monitor, twinview configuration. Such a configuration is set-up and written in xorg.conf via nvidia-setings tool. Removing all these entries from xorg.conf, display port started to work as expected.

share|improve this answer
Can you explain how to do that? – user55014 Apr 15 '12 at 16:50

protected by Community Apr 15 '12 at 16:51

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