screen resolution

Antonio Olivares olivares14031 at yahoo.com
Sat Sep 9 02:10:06 UTC 2006



--- Thufir <hawat.thufir at gmail.com> wrote:

> I'm just starting to research screen resolution.  I
> want to safely
> increase my screen resolution, but first need to
> make notes on how to
> recover, via the fedora rescue CD, in the event
> things go wrong.
> 
> At this point I'm just thinking aloud, but please do
> chime in!  :)
> 
> data:
> 
> [thufir at arrakis ~]$ cat /etc/X11/xorg.conf -n
>      1
>      2  # XFree86 4 configuration created by
> pyxf86config
>      3
>      4  Section "ServerLayout"
>      5          Identifier     "Default Layout"
>      6          Screen      0  "Screen0" 0 0
>      7          InputDevice    "Mouse0"
> "CorePointer"
>      8          InputDevice    "Keyboard0"
> "CoreKeyboard"
>      9  EndSection
>     10
>     11  Section "Files"
>     12
>     13  # Multiple FontPath entries are allowed
> (they are concatenated together)
>     14  # By default, a font server independent of
> the X server is
>     15  # used to render fonts.
>     16          FontPath     "unix/:7100"
>     17  EndSection
>     18
>     19  Section "Module"
>     20          Load  "dbe"
>     21          Load  "extmod"
>     22          Load  "fbdevhw"
>     23          Load  "glx"
>     24          Load  "record"
>     25          Load  "freetype"
>     26          Load  "type1"
>     27          Load  "dri"
>     28  EndSection
>     29
>     30  Section "InputDevice"
>     31
>     32  # Specify which keyboard LEDs can be
> user-controlled (eg, with xset(1))
>     33  #       Option  "Xleds"         "1 2 3"
>     34  # To disable the XKEYBOARD extension,
> uncomment XkbDisable.
>     35  #       Option  "XkbDisable"
>     36  # To customise the XKB settings to suit your
> keyboard, modify the
>     37  # lines below (which are the defaults).  For
> example, for a non-U.S.
>     38  # keyboard, you will probably want to use:
>     39  #       Option  "XkbModel"      "pc102"
>     40  # If you have a US Microsoft Natural
> keyboard, you can use:
>     41  #       Option  "XkbModel"      "microsoft"
>     42  #
>     43  # Then to change the language, change the
> Layout setting.
>     44  # For example, a german layout can be
> obtained with:
>     45  #       Option  "XkbLayout"     "de"
>     46  # or:
>     47  #       Option  "XkbLayout"     "de"
>     48  #       Option  "XkbVariant"    "nodeadkeys"
>     49  #
>     50  # If you'd like to switch the positions of
> your capslock and
>     51  # control keys, use:
>     52  #       Option  "XkbOptions"   
> "ctrl:swapcaps"
>     53  # Or if you just want both to be control,
> use:
>     54  #       Option  "XkbOptions"   
> "ctrl:nocaps"
>     55  #
>     56          Identifier  "Keyboard0"
>     57          Driver      "kbd"
>     58          Option      "XkbModel" "pc105"
>     59          Option      "XkbLayout" "us"
>     60  EndSection
>     61
>     62  Section "InputDevice"
>     63          Identifier  "Mouse0"
>     64          Driver      "mouse"
>     65          Option      "Protocol" "IMPS/2"
>     66          Option      "Device"
> "/dev/input/mice"
>     67          Option      "ZAxisMapping" "4 5"
>     68          Option      "Emulate3Buttons" "yes"
>     69  EndSection
>     70
>     71  Section "Monitor"
>     72
>     73   ### Comment all HorizSync and VertSync
> values to use DDC:
>     74          Identifier   "Monitor0"
>     75          VendorName   "Monitor Vendor"
>     76          ModelName    "Samsung SyncMaster
> 753DF(X)/703DF(X)/783DF(X)/CD173A(T)"
>     77          DisplaySize  320        240
>     78   ### Comment all HorizSync and VertSync
> values to use DDC:
>     79          HorizSync    30.0 - 71.0
>     80          VertRefresh  50.0 - 160.0
>     81          Option      "dpms"
>     82  EndSection
>     83
>     84  Section "Device"
>     85          Identifier  "Videocard0"
>     86          Driver      "sis"
>     87          VendorName  "Videocard vendor"
>     88          BoardName   "Silicon Integrated
> Systems [SiS] 661/741/760/761 PCI/AGP VGA Display
> Adapter"
>     89  EndSection
>     90
>     91  Section "Screen"
>     92          Identifier "Screen0"
>     93          Device     "Videocard0"
>     94          Monitor    "Monitor0"
>     95          DefaultDepth     24
>     96          SubSection "Display"
>     97                  Viewport   0 0
>     98                  Depth     16
>     99                  Modes    "800x600" "640x480"
>    100          EndSubSection
>    101          SubSection "Display"
>    102                  Viewport   0 0
>    103                  Depth     24
>    104                  Modes    "800x600" "640x480"
>    105          EndSubSection
>    106  EndSection
>    107
>    108  Section "DRI"
>    109          Group        0
>    110          Mode         0666
>    111  EndSection
>    112
> [thufir at arrakis ~]$
> [thufir at arrakis ~]$ date
> Sat Sep  9 02:24:54 IST 2006
> [thufir at arrakis ~]$
> [thufir at arrakis ~]$
> 
> 
> 
> thanks,
> 
> Thufir
> 
> -- 
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> 

Try doing the following 
become root user 
[thufir at arrakis ~]$ su -
password: *****
[root at arrakis ~]# cp /etc/X11/xorg.conf
/etc/X11/xorg.conf.bak

as root user type gedit/kedit/ etc. or vim/emacs from
command line if you are not in a Window
Manager/Desktop Environment like GNOME or KDE. 

Change the lines where you see Modes to 
Modes   "1600x1200" "1280x1024" "1024x768" "800x600"
"640x480"

check your monitor's specifications as to how much
resolution is allowed 
"1600x1200" "1280x1024" "1024x768" 
put the highest resolution that your monitor supports.
 In case that you have exceeded your monitors
specifications, CTRL ALT BACKSPACE to get out of X
environment and/or reboot press a to grub before
booting and put a 3 to enter into level 3 and edit
your xorg.conf file.

Hope this helps,

Antonio 

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