Ubuntu
unity-control-center package

  1. Bug #1304627
  2. Comment #4

Comment 4 for bug 1304627

Revision history for this message
William Harryman (william-harryman) wrote :

I have the same error on my laptop, running 14.04 LTS with an AMD Radeon Mobility HD 5800 series graphics card. I attempted to plug in a monitor into the HDMI and one into the VGA ports, while running the laptop screen. From researching, it appears that this card, and presumably others, only allow two "legacy" connections , and I'm assuming that one of those connections is taken up by the laptop monitor, preventing the "third" monitor from being activated - if I activate the HDMI monitor, the VGA switches off, and vice versa, again with the unintelligible error messages observed above (I think mine said CRTC 148/149, and same "unmapped Quark" error.
If your graphics card has a DisplayPort, you can use an 'active' adapter and plug in the third monitor, as one solution.
Hopefully this description can help run down the string error msg, and at least this description might help someone who arrives here by Google.