X oddities under Debian

[Walter Dnes]

On Sun, Oct 12, 2003 at 05:08:29PM -0400, Anton Markov wrote
> Hello Walter,
> 
> Have you tried using xrandr?  It can switch your *virtual* desktop size 
> so you can change the size of your screen without scrolling.

  As Fraser notes, it's not part of Debian stable.

> The only catch I have noticed is that the resolution has to be one of 
> the mod lines in XF86Config.

  The Colas XFree Modeline Generator is a nice site for that.  Note that
the output is specific to each monitor model.  You can "smoke" your
monitor if you enter the wrong numbers for the sync limits.  Here's the
output for my NEC MultiSync 95...

#
#   Colas XFree Modeline Generator results
#
# Computed by http://koala.ilog.fr/cgi-bin/nph-colas-modelines
# Max Bandwidth: *180* Mhz
# Max Vertical Frequency: *160* Hz
# Max Horizontal Frequency: *96* Khz
# Minimun Refresh Rate: *30* Hz Min Bandwidth: *20* Mhz
# Min Horizontal Frequency: *31* Khz
#
# ModeLine "name" dotclock width x x x heigth y y y #RefreshRate
#
# ------------------------------------------------------------------------

  ModeLine "320x240" 20.07 320 336 416 448 240 242 254 280 #160Hz
  ModeLine "328x246" 20.86 328 344 424 456 246 248 260 286 #160Hz
  ModeLine "336x252" 21.67 336 352 432 464 252 254 266 292 #160Hz
  ModeLine "344x258" 22.50 344 360 440 472 258 260 272 298 #160Hz
  ModeLine "352x264" 23.34 352 368 448 480 264 266 278 304 #160Hz
  ModeLine "360x270" 24.20 360 376 456 488 270 272 284 310 #160Hz

[...major snippage of 8X6 increments...]

  ModeLine "2368x1776" 174.33 2368 2472 2992 3200 1776 1778 1790 1816 #30Hz
  ModeLine "2376x1782" 175.34 2376 2480 3000 3208 1782 1784 1796 1822 #30Hz
  ModeLine "2384x1788" 176.36 2384 2488 3008 3216 1788 1790 1802 1828 #30Hz
  ModeLine "2392x1794" 177.38 2392 2496 3016 3224 1794 1796 1808 1834 #30Hz
  ModeLine "2400x1800" 178.40 2400 2504 3024 3232 1800 1802 1814 1840 #30Hz
  ModeLine "2408x1806" 179.43 2408 2512 3032 3240 1806 1808 1820 1846 #30Hz

  They also allow customized ratios.  I hear that LCD displays suck if
used at anything other than whole number fractions.  1600x800 displays
OK at 800x600 and 400x300.  1280x1024 is usually a loss at resolutions
supported in Windows.  But with Kolas, you should be able to generate
640x512 and 320x256 modelines, which would be OK.

-- 
Walter Dnes <waltdnes-SLHPyeZ9y/tg9hUCZPvPmw at public.gmane.org>
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