[Bug 273306] Re: [Hardy, Intrepid, 915G] Low resolution mode set from non-existent VGA connection

[Geir Ove Myhr]

The behaviour in Jaunty alpha-2 is the same as for Intrepid, except
the for the 7-8 times I logged out and in again the "Good" case never
happened, so it may be more consistent now. I'm attaching the relevant
files as captured from a LiveCD.

I find it funny that while Xorg.0.log reports VGA to be connected:
(II) intel(0): Output VGA connected
...
(II) intel(0): Output configuration:
(II) intel(0):   Pipe A is on
(II) intel(0):   Display plane A is now enabled and connected to pipe A.
..
(II) intel(0):   Output VGA is connected to pipe A
xrandr reports it to be disconnected:
VGA disconnected 1152x864+0+0 (normal left inverted right x axis y
axis) 0mm x 0mm

This bug report has become a bit messy over time, so I'm wondering if
it perhaps would be an idea to close it and file a new and cleaned up
one.


** Attachment added: "xrandr-jauntyalpha2.txt"
   http://launchpadlibrarian.net/21221407/xrandr-jauntyalpha2.txt

** Attachment added: "lspci-vvnn-jauntyalpha2.txt"
   http://launchpadlibrarian.net/21221408/lspci-vvnn-jauntyalpha2.txt

** Attachment added: "Xorg.0.log.jauntualpha2.txt"
   http://launchpadlibrarian.net/21221409/Xorg.0.log.jauntualpha2.txt

** Summary changed:

- [Hardy,Intrepid,915G] Low resolution mode set from non-existent VGA connection
+ [i915G] Low resolution mode set from non-existent VGA connection

** Description changed:

  Binary package hint: xserver-xorg-video-intel
  
  On a Dell Optiplex SX280 with intel 915G graphics and DVI output to a
  1600x1200 monitor, the login screen graphics only fills the upper left
  1280x800 of the screen. When logging in, the bar that is supposed to be
  on the bottom of the screen (in either KDE or Gnome) therefore appears
  halfway up. Other than affecting the placement of elements relative to
  the bottom of the screen, everything seems to be working fine. This does
  not happen always. Often, when the computer is rebooted, it is fine for
- the first login screen, but it the problem then shows up if the X-server
- is killed with Ctrl-Alt-Backspace.
+ the first login screen, but the problem then shows up if the X-server is
+ killed with Ctrl-Alt-Backspace.
  
  I attach a screenshot of the login screen (taken from vt2 with 'chvt 7;
  sleep 4; XAUTHORITY=/var/lib/gdm/:0.Xauth DISPLAY=":0.0" import -window
  root importdump.png; chvt 2' as root). Running xserver-xorg-video-intel
  2:2.2.1-1ubuntu13.6.
  
  I have tried with two different displays, Dell 2001FP and 2007FP, with
  the same result. Using the driver "i810" instead of "intel" makes the
  problem go away. So does switching from DVI to VGA.
  
  I will attach a few log files. They are all taken when after the initial
  login screen after boot was fine, and the next had the problem, so the
  ones with "old" in the filename are logs where I saw no problems.
  
  Update: The problem also occurs in Intrepid but the symptoms are
  slightly different (see comments). The underlying problem seems to be
  that the driver detects something on the VGA port (which is
  disconnected) and sets the resolution of the DVI output to match this
  imaginary VGA display.
  
+ Note: This is the Ultra Small Form Factor version of Optiplex SX280.
+ This has a DVI-I output, but no VGA output except for what is provided
+ through a DVI-I to VGA and DVI-D spit cable. The problems occur both
+ when the DVI connection is through the split cable (with the VGA part
+ disconnected) and directly from the monitor to the computer DVI-I.
+ 
  [lspci]
  00:00.0 Host bridge [0600]: Intel Corporation 82915G/P/GV/GL/PL/910GL Memory Controller Hub [8086:2580] (rev 04)
      	Subsystem: Dell Device [1028:0179]
  00:02.0 VGA compatible controller [0300]: Intel Corporation 82915G/GV/910GL Integrated Graphics Controller [8086:2582] (rev 04)
      	Subsystem: Dell Device [1028:0179]

** Tags added: jaunty

-- 
[i915G] Low resolution mode set from non-existent VGA connection
https://bugs.launchpad.net/bugs/273306
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