Resolution problem (Fedora Core 5)

onkia · 08-07-2006, 03:50 AM

Hi!

I have FC5 and my laptop is IBM Thinkpad.

I bought viewSonic VA2012w 20" LCD display.
Now when I change the resolution -> 1680x1050 (Administration->Display) and reboot the computer nothing happens?

My xorg.conf looks like this:

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 16
Modes "1600x1200" "800x600" "640x480"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1600x1200" "1400x1050" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

PS.

I cant change settings (preferences -> Screen resolution)
I can only choose
RESOLUTION: 1024x768
REFRESH RATE: -25869 Hz

What can I do ?

jschiwal · 08-07-2006, 04:26 AM

You don't have a "1680x1050" entry your xorg.conf file.

You also don't have a horizontal or vertical frequency entries. That is OK if the Display Data Channel (DDC) supplies this information.

onkia · 08-07-2006, 04:33 AM

Ok. Now I made changes:

Modes "1680x1050" "800x600" "640x480"

Modes "1680x1050" "1400x1050" "1280x960" "1152x864" "1024x768" "800x600" "640x480"

But still nothing.

Quote:

You also don't have a horizontal or vertical frequency entries. That is OK if the Display Data Channel (DDC) supplies this information.

Where I can find out is DDC supplies this information ?

jschiwal · 08-07-2006, 08:44 AM

Try looking at your Xorg.0.log file

Code:

jschiwal@hpamd64:~/podcasts> cat -n /var/log/Xorg.0.log | grep ddc
   509  (II) Loading sub module "ddc"
   510  (II) LoadModule: "ddc"
   511  (II) Loading /usr/X11R6/lib64/modules/libddc.so
   512  (II) Module ddc: vendor="X.Org Foundation"
   521  (II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
   522  (II) NV(0): I2C device "DDC:ddc2" removed.
   525  (II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
   526  (II) NV(0): I2C device "DDC:ddc2" removed.
jschiwal@hpamd64:~/podcasts> cat  /var/log/Xorg.0.log | sed -n '509,530p'
(II) Loading sub module "ddc"
(II) LoadModule: "ddc"
(II) Loading /usr/X11R6/lib64/modules/libddc.so
(II) Module ddc: vendor="X.Org Foundation"
        compiled for 6.9.0, module version = 1.0.0
        ABI class: X.Org Video Driver, version 0.8
(II) NV(0): I2C bus "DDC" initialized.
(II) NV(0): Probing for analog device on output A...
(--) NV(0):   ...can't find one
(II) NV(0): Probing for analog device on output B...
(--) NV(0):   ...can't find one
(II) NV(0): Probing for EDID on I2C bus A...
(II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
(II) NV(0): I2C device "DDC:ddc2" removed.
(II) NV(0):   ... none found
(II) NV(0): Probing for EDID on I2C bus B...
(II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
(II) NV(0): I2C device "DDC:ddc2" removed.
(II) NV(0):   ... none found
(--) NV(0): CRTC 1 is currently programmed for DFP
(II) NV(0): Using DFP on CRTC 1
(--) NV(0): Panel size is 1280 x 800

Also, scan through the log for info on why your desired resolution didn't start.
If the resolution was set up and not rejected, then try changing the resolution using the "krandrtray" program.

If it was rejected, try generating a modeline for that resolution with the command "gtf 1680 1050 56 -x".

Also, use google to try to get the full specs on your monitor.

hasmukh · 08-07-2006, 09:27 AM

In xorg.cofg do the following changes

Section Device

Identifier "Videocard0"

Change driver as "vesa"

and change mode as ur desired resolution

Hope it will work

HASMUKH

lazlow · 08-07-2006, 10:39 AM

Try changing it in System->Administration->Display. For whatever reason Fc5 will not let the setting in preference be higher than in admin.

Lazlow