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Old 04-12-2002, 11:01 AM   #1
LQ Newbie
Registered: Feb 2002
Location: london
Distribution: Redhat 7.1 windows Xp home
Posts: 9

Rep: Reputation: 0
Can't Log into the system it says no screens found

I was trying to change the colour quality in my Redhat 7.1 system so while running X windows i typed in "startx -32 " to start X in 32 bit (in the X term) i also type in startx -16". When i typed these two commands the screen just restarted in an apparently different colour mode.... i though ok !.Then logout ....the next time i logged into my system (using a text login) i typed in my password and expecting my desktop but nothing happened, i was auotmaticaly loggout out and send back to the text login....

Some messages are displyed on the sreen saying no " screens found".....
May be something went wrong with the XF86Config file but i can't edit the file using console login can i ( i mean its console so when i try to open an editor its says i cannot open display)....

Even if i could which file contains my current setting... i looked in the /etc/X11 and there are several files my guess is its this one

# File generated by anaconda.

Section "ServerLayout"
Identifier "Anaconda Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"

Section "Files"

# The location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.

RgbPath "/usr/X11R6/lib/X11/rgb"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.

FontPath "unix/:7100"


Section "Module"
Load "GLcore"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "pex5"
Load "dri"
Load "glx"
Load "pex5"
Load "record"
Load "xie"

Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"

# Option "AutoRepeat" "500 5"

# when using XQUEUE, comment out the above line, and uncomment the
# following line
# Option "Protocol" "Xqueue"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds" "1 2 3"

# To disable the XKEYBOARD extension, uncomment XkbDisable.
# Option "XkbDisable"

# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults). For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:nocaps"
Option "XkbRules" "xfree86"
Option "XkbModel" "microsoft"
Option "XkbLayout" "gb"
#Option "XkbVariant" ""
#Option "XkbOptions" ""

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "PS/2"
Option "Device" "/dev/psaux"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 31.5-48.5
VertRefresh 50-70

# -- 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
1050 1051 1054 1100 +HSync +VSync


Section "Device"
# no known options
Identifier "Intel 815"
Driver "i810"
VendorName "Intel 815"
BoardName "Intel 815"
VideoRam 4096


Section "Screen"
Identifier "Screen0"
Device "Intel 815"
Monitor "Monitor0"
DefaultDepth 16

Subsection "Display"
Depth 32
Modes "1024x768"


Section "DRI"
Mode 0666


(Am now using windows oh i miss my linux):smash:
Old 04-12-2002, 11:36 AM   #2
Registered: Apr 2002
Location: The next brick house on the right.
Distribution: Kubuntu 8.04
Posts: 668

Rep: Reputation: 31
You should be able to start an editor such as vi, or joe, or jed, or xjed, as root. These don't require an active X window session. Then in the editor change the screen section of the XF86Config-4 file as follows:

Section "Screen" 
Identifier "Screen0" 
Device "Intel 815" 
Monitor "Monitor0" 
# DefaultDepth 16
DefaultDepth 32
Save it and then try to startx again. Let us know what happens.

Last edited by jglen490; 04-12-2002 at 11:38 AM.
Old 04-12-2002, 06:48 PM   #3
Registered: Jun 2001
Location: Fairfax, California
Distribution: RH 9.0, RH 7.3, Mandrake 8.0
Posts: 986

Rep: Reputation: 30
HorizSync 31.5-48.5
VertRefresh 50-70
Those are pretty low refresh rates; are you sure they're correct? Check the specs in your monitor's manual.

Also, in Redhat you should be able to run one of the video configuration tools from the command line. Try:

XFree86 -configure
Old 04-12-2002, 11:13 PM   #4
LQ Newbie
Registered: Feb 2002
Location: london
Distribution: Redhat 7.1 windows Xp home
Posts: 9

Original Poster
Rep: Reputation: 0
RE: low refresh rate

When installing the system i tried to get the appropriate refresh setting for the monitor ( dell INSPIRON 2500 laptop) but scince its an LCD monitor i couldn't get the refrest rate for it i so i chosed the default setting for an unprobed monitor.


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