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Old 07-10-2002, 09:19 PM   #1
spooge
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Registered: Nov 2001
Location: n chicago, IL. USA
Distribution: Slackware
Posts: 307

Rep: Reputation: 31
refreshrate in xf86conf-4


so is there a line that forces a preferred refreshrate ?
i have my modes,
i have my depths,.......

i'm runnin AT 1280X1024, and this thing has gone choppy!

Section "Screen"
Idedntifier "Screen0"
devicee "NViDIA GeForcee 2 GTS (generic)
Monitor "Monitor0"
DefaultDepth 24

SubSection Display
depth 24
modes "1280x1024" 1280x960"
endsubsection

i typed the above ^ so theres typos


also....

if new xfree doesn't use modelines, why are there modeline settings under
my " Section "Monitor" "? are these left over from the upgrade?


MY CONFIG:
------------------------
Section "Monitor"
Identifier "Monitor0"
VendorName "ViewSonic"
ModelName "P815"
HorizSync 30-115
VertRefresh 50-160
Option "dpms"

# -- 1400x1050 --
# 1400x1050 @ 60Hz, 65.8 kHz hsync
Modeline "1400x1050" 129 1400 1464 1656 1960
1050 1051 1054 1100 +HSync +VSync

# 1400x1050 @ 70Hz, 76.8 kHz hsync
Modeline "1400x1050" 151 1400 1464 1656 1960
1050 1051 1054 1100 +HSync +VSync

# 1400x1050 @ 75Hz, 82.3 kHz hsync
Modeline "1400x1050" 162 1400 1464 1656 1960
1050 1051 1054 1100 +HSync +VSync

# 1400x1050 @ 85Hz, 93.2 kHz hsync
Modeline "1400x1050" 184 1400 1464 1656 1960
 
Old 07-10-2002, 11:16 PM   #2
mlp68
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Registered: Jun 2002
Location: NY
Distribution: Gentoo,RH
Posts: 333

Rep: Reputation: 40
The modeline (there are a lot of "built-in" ones, so you see only non-standard ones in the config) that gets selected selects the refresh rate. You have an entry in the config specifying the resolution (eg 1280x1024); the server picks the highest refresh rate it finds supported (other constraints come in; max v and h frequency ranges etc)

Look at the /var/log/XFree86.0.log file to see which one gets selected - here's from my file:

Code:
(II) NV(0): Not using default mode "960x720" (hsync out of range)
(--) NV(0): Virtual size is 1280x1024 (pitch 1280)
(**) NV(0): Mode "1280x1024C": 157.5 MHz, 93.1 kHz, 86.2 Hz
(II) NV(0): Modeline "1280x1024C"  157.50  1280 1364 1524 1692  1024 1041 1044 1080 +hsync +vsync
ok, so I get 86.2 Hz.

Note the "1280x1024C". That is not any of the built-in ones. I usually tweak the display just the way I like it with xvidtune, make it bigger, better centered, whatever. xvidtune lets you output the modeline that you adjusted ("show"). Grab that line and add it to the XF86config-4 file, giving it a new name (with the "C" in my case).

Then, in the same file,
Code:
Section "Screen"
	Identifier   "Screen0"
        Device       "RIVA TNT2"
        Monitor      "Monitor0"
	DefaultDepth	24

	Subsection "Display"
        	Depth       24
                Modes       "1280x1024C"
	EndSubsection

EndSection
to make it use your custom modeline. If you get a lot of your day's light from the tube like I do, that extra bit of work is well worth it.

Hope it helps,
Martin
 
  


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