i have X up and running, but i think the refresh rates need adjusting because the screen sort of flickers. i found the support page for my monitor, and they gave me the following info:

Supports Resolutions up to 1600 x 1200 pixels @75hz
H-Frequency 30 kHz - 95 kHz
V-Frequency 50 Hz - 160 Hz

I started with those ranges in XF86Config, but gradually narrowed the range down. now I have it at like 60-80, and 70-130, but as far as I can tell, it makes no difference...I'm wondering if it's because I appear to have both the "vga" and "vesa" drivers installed, when all I wanted was vesa. the thing is, I commented out all the lines referring to "vga" and then X wouldn't start. said it couldn't find a screen.

here's the relevant section of my XF86Config file:


# **********************************************************************
# Monitor section
# **********************************************************************

# Any number of monitor sections may be present

Section "Monitor"

Identifier "Envision"

# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

HorizSync 30-95

# HorizSync 30-64 # multisync
# HorizSync 31.5, 35.2 # multiple fixed sync frequencies
# HorizSync 15-25, 30-50 # multiple ranges of sync frequencies

# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

VertRefresh 50-160

EndSection


# **********************************************************************
# Graphics device section
# **********************************************************************

# Any number of graphics device sections may be present

# Standard VGA Device:

Section "Device"
Identifier "Standard VGA"
VendorName "Unknown"
BoardName "Unknown"

# The chipset line is optional in most cases. It can be used to override
# the driver's chipset detection, and should not normally be specified.

# Chipset "generic"

# The Driver line must be present. When using run-time loadable driver
# modules, this line instructs the server to load the specified driver
# module. Even when not using loadable driver modules, this line
# indicates which driver should interpret the information in this section.

Driver "vga"
# The BusID line is used to specify which of possibly multiple devices
# this section is intended for. When this line isn't present, a device
# section can only match up with the primary video device. For PCI
# devices a line like the following could be used. This line should not
# normally be included unless there is more than one video device
# intalled.

# BusID "PCI:0:10:0"

# VideoRam 256

# Clocks 25.2 28.3

EndSection

# Device configured by xf86config:

Section "Device"
Identifier "ATIUnenhanced"
Driver "vesa"
#VideoRam 131072
# Insert Clocks lines here if appropriate
EndSection


# **********************************************************************
# Screen sections
# **********************************************************************

# Any number of screen sections may be present. Each describes
# the configuration of a single screen. A single specific screen section
# may be specified from the X server command line with the "-screen"
# option.
Section "Screen"
Identifier "Screen 1"
Device "ATIUnenhanced"
Monitor "Envision"
DefaultDepth 24

Subsection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
EndSection

I think theres a little more to it than that. Try running xfree86config and see if that helps. Most of the time that grabs my refresh rate for me and it's usually a good one.

i've run xf86config several times, but the problem hasn't gone away. recently, i found a gnome desktop config. tool (GUI) that says my refresh rate is 85Hz. that sounds pretty good to me. so i'm thinking maybe the problem isn't that, but maybe the colors, fonts etc. i thought i already had anti-aliased fonts, but maybe i didn't apply the replacement table properly or something...so i'll do some more research into that.

Are you sure you ran "xfree86config" and not "xf86config" they are different

I have had the same problem.

My screen flickers in KDE but not in gnome.

My monitor is only a 14", capable of 1024x768, and a refresh rate of 50 - 60mhz.

I will try running xfree86config when I get home too.

Thanks

the first time I install slackware, I have that problem too, of the flickers stuff. I install and configure X several times, and always had the same results the flickers in my screen. And I was using the vert and horz rates of my monitor fine. Searching the net always says:

30-50 Vert
50-120 Horz

but that didn´t work to me under slack and I always had to put

31.5-50 Vert
61-120 Horz

and only that way, slack boot my X server fine, but with the flickers on it what a pain. the case is, yesterday I install again slackware, and in the part of lilo frame buffer I didn´t select any, I just select the one that says standard whit out the tux penguin when boot. I didn´t install xfree either, I didn´t install any X server until I have my slack up and running then I download swaret and download xorg, I configure xorg.conf manually and did startx and what I see? No more flickers, I think the problem is the resolution frame buffer in Lilo, cause I install slack in another box and did select a resolution in Lilo for that box then configure my X did startx and saw the damn flickers again. I don know what the problem is, but I not selecting anymore lilo frame buffer, I don´t have any tux when booting but I have my X work and running fine like I was having before under mandrake or redhat.

What videocard do you have?
Looks like not configured (generic driver) or older low memory ati card?
if you have some 2 meg hardware it is impossible to get 1280x1024@100hz with it.
also if you have monitor actual supporting 50-150, keep this setting, more choices to find working combination between display and adapter.

So, can you card handle higher refresh rates?
Installing correct video driver may be also helpful.