Comment 2 for bug 12829

Daniel, you are not right - majority CRT monitors work at 85 Hz in they
recommended mode (see table above) while higher-end monitors work fine at 100Hz.

Monitors vertical refresh depends on maximal horizontal sync, I can provide
simple table for recommended modes:

800x600 @ 85Hz hsync: 53 kHz (low quality 15" monitors and good 14" have
maximum hsync ~54 kHz)
1024x768 @ 85Hz hsync: 68 kHz (good 15" and low quality 17" monitors have
maximum hsync ~70 kHz)
1152x864 @ 85Hz hsync: 77 kHz (most 17" monitors and low quality 19" have
maximum hsync ~85 kHz)
1152x864 @ 100Hz hsync: 89 kHz (high-end 17" monitors and most 19" have maximum
hsync ~95kHz)
1280x1024 @ 85Hz hsync: 91 kHz (most 19" and low quality 21" have maximum hsync
~95kHz)
1280x1024 @ 100Hz hsync: 107 kHz (high-end 19" and most 21" have maximum hsync
~110kHz)
1600x1200 @ 85Hz hsync: 106 kHz (most 21" have maximum hsync ~110kHz)

For example my 17" Hansol 701P monitor is made at 1998 and supports only TCO95,
it has maximal horizontal sync 85kHz and I usually use 1024x768 @ 100Hz and very
rarely 1152x864 @ 85Hz

As you see, it's always safe to choose resolution with 85 Hz vertical refresh
for all monitors, which has maximal hsync >=68 kHz, only low quality 15"
monitors can't work with 1042x768 @ 85Hz and low quality 14" monitors can't do
800x600 @ 85Hz, so we can discuss which mode would be better for monitors, which
horiz sync is less 68 kHz

If there are posibility to know real monitors CRT size, then we can set
resolution with 100 Hz vertical refresh on 17" monitors with maximal hsync >= 89
kHz and 19" monitors with maximal hsync >= 107 kHz

There are lots of hardware and eyes safety sites, which recommend to use 800x600
on 14"-15", 1024x768 on 17" and don't recommend to use vertical refresh lower
than 85 Hz, look for example at http://www.hwupgrade.com/monitor/index4.html

According TCO99 and TCO2003 85Hz is *mandatory* and 100Hz is recommended, so
this bug isn't enhancement, Ubuntu Linux should care about users eyes.

Various monitors hsync data you can see at any monitor manufacturer's sites, for
exampe cheap manufacturer Proview:

http://www.proview.net/static/products/crt_series.html

or at hardware testing sites, for example this old article:
http://graphics.tomshardware.com/display/20020805/crt-09.html

Btw, you can find more examples in google ir you don't believe me ;)