http://qa.mandrakesoft.com/show_bug.cgi?id=2255





------- Additional Comments From [EMAIL PROTECTED]  2003-03-27 09:19 -------
The problem with changing the default refresh rate has nothing to do with the
video card. Older monitors, which are still in use, can be physically damaged by
setting a rate higher than they are capable of. The ranges in XF86Config-4 are
safe for most SVGA capable monitors. If your monitor is identified (through
EDID) *and* has an entry in the database specifying what it is capable of you
should get  a range that works well. Unfortunately many monitors (Tatungs, in my
experience) have incorrect info in the database that results in lower ranges
than the manufacturer actually suggests, or the monitor is not in the database
at all and gets the default. The fix is to make sure Mandrake has the specs for
your monitor *from the manufacturer spec sheet* (as opposed to a 'best guess').
If the monitor isn't listed then Mandrake is quite correct in assuming
worst-case and not allowing a range that could cause damage.

Reading the EDID alone doesn't give enough information to make a safe judgement
as to what ranges are safe. Especially on the multi-sync monitors that have
discreet settings per mode amd cannot do in-between values (Older NEC monitors,
for example).




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------- Reminder: -------
assigned_to: [EMAIL PROTECTED]
status: UNCONFIRMED
creation_date: 
description: 
Using mandrake-9.1rc1. XFdrake generates these default ranges for 1024x768: 
 
   HorizSync 31.5- 57 
   VertRefresh 50-70 
 
Obviously, which these ranges it is impossible to get any refresh rate above 
70Hz. Since XFdrake does not allow one to choose the refresh rate, the default 
ranges should be larger, something like: 
 
   HorizSync 30- 70 
   VertRefresh 50-90 
 
Even 5+ year old cards like riva128 can do 85Hz at [EMAIL PROTECTED]

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