screen resolution changed

[jerrybee]

My screen resolution changed by itself and I can't get it to change back using the Control Center. Which file can I edit to force it to what I want?

[linuxviolin]

/etc/X11/xorg.conf

Sections "Monitor" (put your screen settings in the lines 'HorizSync' and 'VertRefresh') and "Screen" (for the resolutions)

P.S.= Make a backup before...

[jerrybee]

And tonight, magically, the process of changing screen resolution using the Control Center works. And the lines in the Monitor section of /etc/X11/xorg.conf that had previously been suggested still aren't there.

[linuxviolin]

And the lines in the Monitor section of /etc/X11/xorg.conf that had previously been suggested still aren't there.

? This section should be informed with various resolutions, e.g 1024x768 or 1600x1200 or........

In the section "Screen" you must fill the lines 'HorizSync' and 'VertRefresh' with the specifications on your screen.

Maybe you can post your xorg.conf...

P.S.= you must use 'sudo' to edit xorg.conf

[jerrybee]

Code: Select all

   # xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
EndSection

Section "InputDevice"
   Identifier   "Generic Keyboard"
   Driver      "kbd"
   Option      "CoreKeyboard"
   Option      "XkbRules"   "xorg"
   Option      "XkbModel"   "pc105"
   Option      "XkbLayout"   "us"
EndSection

Section "InputDevice"
   Identifier   "Configured Mouse"
   Driver      "mouse"
   Option      "CorePointer"
   Option      "Device"      "/dev/input/mice"
   Option      "Protocol"      "ImPS/2"
   Option      "ZAxisMapping"      "4 5"
   Option      "Emulate3Buttons"   "true"
EndSection

Section "InputDevice"
   Driver      "wacom"
   Identifier   "stylus"
   Option      "Device"   "/dev/input/wacom"
   Option      "Type"      "stylus"
   Option      "ForceDevice"   "ISDV4"      # Tablet PC ONLY
EndSection

Section "InputDevice"
   Driver      "wacom"
   Identifier   "eraser"
   Option      "Device"   "/dev/input/wacom"
   Option      "Type"      "eraser"
   Option      "ForceDevice"   "ISDV4"      # Tablet PC ONLY
EndSection

Section "InputDevice"
   Driver      "wacom"
   Identifier   "cursor"
   Option      "Device"   "/dev/input/wacom"
   Option      "Type"      "cursor"
   Option      "ForceDevice"   "ISDV4"      # Tablet PC ONLY
EndSection

Section "Device"
   Identifier   "VIA Technologies, Inc. VT8378 [S3 UniChrome] Integrated Video"
   Driver      "via"
   BusID      "PCI:1:0:0"
EndSection

Section "Monitor"
   Identifier   "Q19wb"
   Option      "DPMS"
EndSection

Section "Screen"
   Identifier   "Default Screen"
   Device      "VIA Technologies, Inc. VT8378 [S3 UniChrome] Integrated Video"
   Monitor      "Q19wb"
   DefaultDepth   24
   SubSection "Display"
      Modes      "1440x1440" "1440x900" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
EndSection

Section "ServerLayout"
   Identifier   "Default Layout"
   Screen      "Default Screen"
   InputDevice   "Generic Keyboard"
   InputDevice   "Configured Mouse"

# Uncomment if you have a wacom tablet
#   InputDevice     "stylus"   "SendCoreEvents"
#   InputDevice     "cursor"   "SendCoreEvents"
#   InputDevice     "eraser"   "SendCoreEvents"
EndSection 

Well, there's my xorg.conf file, in its entirety, as I find it today. I haven't edited it, so I assume it's in its "as installed" layout. I still don't see any lines about monitor settings and no list of various Depths with the screen resolutions available with each -- I do see all that info in the xorg.conf file in my Debian installation. So, I guess that means that my hardware is being "seen" in one Linux distro and not in another.

I posted somewhere that my desired screen resolution was finally able to be set up in the Control Center -- for several boots, it wouldn't work, and finally it did work. I hope someone can help me sort this out -- intermittent gremlins tend to chip away at what little is left of my sanity.

[jerrybee]

And now tonight, the screen resolution has once again changed to the 1280x1024 (?) by itself and cannot be changed back to 1024x768 via the Control Center.

[linuxviolin]

I guess that "1440x900" is the maximum resolution for the Viewsonic Q19wb monitor.

I am surprised that you did not lines: 'HorizSync' and 'VertRefresh' in the "Monitor" section. Maybe try to add them with the specifications of you screen: 'VertRefresh' 56~75 Hz- 'HorizSync' 30~82 KHz like this:

Code: Select all

Section "Monitor"
   Identifier "Generic Monitor"
   HorizSync 30~82
   VertRefresh 56~75 
   Option "DPMS"
EndSection

For the "Screen" section try to make it appear as

Code: Select all

SubSection "Display"
      Depth 24
      Modes "1440x1440" "1440x900" "1280x1024" "1280x960" "1024x768" "832x624" "800x600" "720x400" "640x480"
   EndSubSection
EndSection

Also your section "Files" is empty and you have not a "Module" section

Here is my xorg.conf (but for Cassandra, I don't use Daryna yet):

Code: Select all

Section "Files"

   FontPath "/usr/share/fonts/X11/misc"
   FontPath "/usr/share/fonts/X11/cyrillic"
   FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
   FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
   FontPath "/usr/share/fonts/X11/Type1"
   FontPath "/usr/share/fonts/X11/100dpi"
   FontPath "/usr/share/fonts/X11/75dpi"
        # path to defoma fonts
   FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
   Load "i2c"
   Load "bitmap"
   Load "ddc"
        Load "dri"
   Load "extmod"
   Load "freetype"
   Load "glx"
   Load "int10"
   Load "vbe"
 EndSection

Section "InputDevice"
   Identifier "Generic Keyboard"
   Driver "kbd"
   Option "CoreKeyboard"
   Option "XkbRules" "xorg"
   Option "XkbModel" "pc105"
   Option "XkbLayout" "fr"
 EndSection

Section "InputDevice"
   Identifier "Configured Mouse"
   Driver "mouse"
   Option "CorePointer"
   Option "Device" "/dev/input/mice"
   Option "Protocol" "ImPS/2"
   Option "ZAxisMapping" "4 5"
   Option "Emulate3Buttons" "true"
 EndSection

Section "InputDevice"
   Identifier "stylus"
   Driver "wacom"
   Option "Device" "/dev/input/wacom"
   Option "Type" "stylus"
   Option "ForceDevice" "ISDV4" # Tablet PC ONLY
 EndSection

Section "InputDevice"
   Identifier "eraser"
   Driver "wacom"
   Option "Device" "/dev/input/wacom"
   Option "Type" "eraser"
   Option "ForceDevice" "ISDV4" # Tablet PC ONLY
 EndSection

Section "InputDevice"
   Identifier "cursor"
   Driver "wacom"
   Option "Device" "/dev/input/wacom"
   Option "Type" "cursor"
   Option "ForceDevice" "ISDV4" # Tablet PC ONLY
 EndSection

Section "Device"
   Identifier "nVidia Corporation GeForce 7300 SE"
   Driver     "nv"
        BusID      "PCI:1:0:0"
 EndSection

Section "Monitor"
   Identifier "Generic Monitor"
   HorizSync 30 - 140
   VertRefresh 50 - 180
   Option "DPMS"
 EndSection

Section "Screen"
   Identifier "Default Screen"
   Device "nVidia Corporation GeForce 7300 SE"
   Monitor "Generic Monitor"
   DefaultDepth 24
   SubSection "Display"
      Depth 1
      Modes "1600x1280" "1600x1200" "1480x1024" "1280x1024" "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth 4
      Modes "1600x1280" "1600x1200" "1480x1024" "1280x1024" "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth 8
      Modes "1600x1280" "1600x1200" "1480x1024" "1280x1024" "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth 15
      Modes "1600x1280" "1600x1200" "1480x1024" "1280x1024" "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth 16
      Modes "1600x1280" "1600x1200" "1480x1024" "1280x1024" "1024x768" "800x600" "640x480"
   EndSubSection
   SubSection "Display"
      Depth 24
      Modes "1600x1280" "1600x1200" "1480x1024" "1280x1024" "1024x768" "800x600" "640x480"
   EndSubSection
 EndSection

Section "ServerLayout"
   Identifier "Default Layout"
   Screen "Default Screen"
   InputDevice "Generic Keyboard"
   InputDevice "Configured Mouse"
   InputDevice "stylus" "SendCoreEvents"
   InputDevice "cursor" "SendCoreEvents"
   InputDevice "eraser" "SendCoreEvents"
 EndSection

Section "DRI"
   Mode   0666
 EndSection


I still don't see any lines about monitor settings and no list of various Depths with the screen resolutions available with each -- I do see all that info in the xorg.conf file in my Debian installation. So, I guess that means that my hardware is being "seen" in one Linux distro and not in another.

You have also Debian on this computer? And your resolution in Debian works properly? Then you can try to copy 'these missing lines' from Debian xorg.conf to Mint xorg.conf (Mint is based on Ubuntu and Ubuntu on Debian so... )

You can also just try to type the command

Code: Select all

sudo dpkg-reconfigure -phigh xserver-xorg

in a console to try automatically update this file.

intermittent gremlins tend to chip away at what little is left of my sanity.

Gremlins? Fight!