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[Richard Harding <729788@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

I am using a X201 on the dock with DVI/Displayport outputs to matched
Dell 22" lcds doing 1920x1080. It was working correctly, but I redid my
install and updated my laptop bios. After the new install xrandr reports
the displayport monitor to only be able to do 1280x1024 resolution (vs
1920).

I've tried to manaully force it:

    % xrandr --addmode DP1 1920x1080
    % xrandr --output LVDS1 --off --output DP1 --mode 1920x1080

    # /var/log/syslog output
    kernel: [44206.334502] [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on crtc ffff8802322a0800

and get the crtc error and no display pops up.

I've loaded the xorg-edgers ppa with no difference. I've also tested the
natty alpha3 live usb to see if an updated package/kernel combo might
help.

I've run across a lot of posts like this, most having to do with
nouveau-drm, so not sure where this falls exactly.

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: i915

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https://bugs.launchpad.net/bugs/729788

Title:
  xrandr reports incorrect max resolution from displayport in laptop
  dock i915