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[Bug 685516] [NEW] Ubuntu 10.04 LTS is unable to handle analog monitors (resolution cannot be set)

 

Public bug reported:

After a couple of years with 8.x on an AMD 64 machine with an Nvidia 285
graphics board, I know switched to 10.04 LTS on an Intel ICH10 machine
(quadcore) with onboard Intel Q45 graphics (Fujitsu Esprimo P5731).

Ubuntu 10.04 LTS is unable to work with my high quality analog monitor
(Samsung Syncmaster 950 p plus). As it is an anlog monitor capable of
going up to 1600 x 1200 at 85 Hz (fh max is 110 kHz) it is connected to
the PC using BNC connectors / coaxial cables - the standard for high
quality analog monitor connection.

BNC connections by design cannot transport DDC information, so EDID is
not available. But instead of either asking the user to manually enter
either the monitor make & model or alternatively it's
resolution/frequency specs, Ubuntu forces the user into extremely ugly
1024 x 768 at 60 Hz. Besides the low resolution, 60 Hz are literally
painful.

After some googling I found some advice in an Ubuntu user forum,
querying a standard VESA modeline at 1600 x 1200 at 85 Hz (cvt  1600
1200 85) and adding this as a new mode (xrandr --newmode [output of cvt]
; xrandr --admode VGA1 1600x1200_85.00). After that I can select the
correct resolution with System / Preferences.

But annoyingly this has to be repeated after every (!) reboot, because
some nasty automatic function thinks that this resolution is beyond the
capabilities of my monitor (which is not true) and dismisses the correct
setting, reverting to 1024 x 768 60 Hz and giving an error message after
login ("correct settings cannot be determined" - ?).

This is highly annoying! If there is an automatic function, there
_always_ (always, always, always!) has to be a manual override. Do not
try to be overly user-friendly. There is nothing wrong with an
additional, optional, manual settings dialog.

In the meantime until the GUI is fixed, is there a way to persistently
convince the X server (or wherever the dismissal of the configuration
takes place) that the resolution is correct?

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

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https://bugs.launchpad.net/bugs/685516

Title:
  Ubuntu 10.04 LTS is unable to handle analog monitors (resolution cannot be set)



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