Screen resolution

John Nilsson john at
Thu Jul 28 17:55:37 UTC 2005

On tor, 2005-07-28 at 09:12 -0400, t_titschinger wrote:
> My system also had me fixed at 640x480 and would not let me use the
> scroll option in screen resolution.  In my xorg.conf file my
> resolutions went up 1200x800.  I just removed the smaller resolutions
> and rebooted.  When I rebooted the scroll works again and it even
> included the 640x480 option.  Is there any chance that this could be a
> bug rather than an inconvenience?

>From xorg.conf(5x):
"Modes  "mode-name" ...
	This optional entry specifies the list of video  modes  to  use.
	Each  mode-name  specified  must be in double quotes.  They must
	correspond to those specified or referenced in  the  appropriate
	Monitor  section  (including implicitly referenced built-in VESA
	standard modes).  The server will delete modes  from  this  list
	which  don’t satisfy various requirements.  The first valid mode
	in this list will be the default display mode for startup.   The
	list  of  valid  modes  is  converted internally into a circular
	list.   It  is  possible  to  switch  to  the  next  mode   with
	Ctrl+Alt+Keypad-Plus and to the previous mode with Ctrl+Alt+Key‐
	pad-Minus.  When this entry is omitted, the valid  modes  refer‐
	enced  by  the appropriate Monitor section will be used.  If the
	Monitor section contains no modes, then the  selection  will  be
	taken from the built-in VESA standard modes."

I'm guessing that you had a list of modes where only 640x480 was valid
for som reason. When you deleted that there was no valid modes and X
resorted to either your Monitors ideas of supported modes ot the
built-in VESA modes.


More information about the ubuntu-users mailing list