Ubuntu

10.04 How to set resolution in low graphics mode to lower res? got an xorg.conf now :)

Asked by Tom

Hi :)

My boot-up gets stuck unless i use

"recovery mode" - failsafe

which boots me into "Low resolution mode" but this is 1280by1024 whereas i prefer 1024by768.
It seems that xorg.conf has completely vanished with this new kernel! So, how can i set a lower resolution to try to boot normally into?

Larry gave some advice in
https://answers.launchpad.net/ubuntu/+question/108290
but i couldn't do this even in recovery mode because the screen is in use?? lol. Is there a way of doing "Xorg -configure" when the screen is not in use??

Thanks & regards from
Tom :)

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subliminalfix (subliminalfix) said : 		#1

can you get to your terminal under application>acessories
first youll need to get your graphic card info

lscpi -q

1: In a Terminal enter sudo gedit /etc/X11/xorg.conf
2: Copy the file /etc/X11/xorg.conf to /etc/X11/xorg.conf.bak

3: Have a look at the screen section (the sub section is important)

Section "Screen"
 Identifier "Default Screen"
 Device "enter your info here"
 Monitor "Generic Monitor"
 DefaultDepth 24
        SubSection "Display"
                   Modes "1280x800"
        EndSubSection
EndSection

4: Save the file
5: Restart the system

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Tom (tom6) said : 		#2

Hi :)

lspci -q gave me a LOT of output, should i grep it?

Regards from
Tom :)

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Tom (tom6) said : 		#3

ahh, i think the relevant lines from lspci -q are

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon X1650 Pro (rev 9e)
01:00.1 Display controller: ATI Technologies Inc Radeon X1650 Pro (Secondary) (rev 9e)

?

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Tom (tom6) said : 		#4

Larry's suggestion of xorg -config would in recovery mode when i dropped to root shell with no networking :)

So, i now have an xorg.conf but still don't know how to use it
Regards from
Tom :)

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Tom (tom6) said : 		#5

Hi :)

In the xorg.conf there were a lot of subsections like this

 SubSection "Display"
  Viewport 0 0
  Depth 8
 EndSubSection

The depth numbers were 1, 4, 8, 15, 16, 24

I pasted in and altered the bit you gave me so it looks like this at the start of that screen section now

Section "Screen"
 Identifier "Screen0"
 Device "Card0"
 Monitor "Monitor0"
  DefaultDepth 24
        SubSection "Display"
                   Modes "1024x768"
        EndSubSection

I noticed a section before screen called "Device" (not a subsection a full section. Tons of stuff in there. Near the end i noticed

 Identifier "Card0"
 Driver "radeon"
 VendorName "ATI Technologies Inc"
 BoardName "Radeon X1650 Pro"
 BusID "PCI:1:0:0"

which all seems right(?) seems to fit with your plan too?
Regards from
Tom :)

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