Author Topic: [SOLVED] Video resolution not recognised by display  (Read 719 times)

Offline Rebecca_D

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[SOLVED] Video resolution not recognised by display
« on: November 10, 2012, 10:15:34 PM »
I have got myself into a pickle! Having recently installed PCLOS Maya I did not like the default screen resolution (1024x768) so changed it through the hardware system wizard to a higher one (1280x800). Unfortunately when I re-booted the display told me on a black screen that it did not support this resolution. As far as I can tell PCLOS is loading, although I never reached (saw) the login. Is there any way to repair this using the original installation disk or will I have to do a completely new installation?

Thanks.
« Last Edit: November 11, 2012, 01:22:16 PM by Rebecca_D »

Offline Rebecca_D

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Re: Video resolution not recognised by display
« Reply #1 on: November 10, 2012, 11:14:08 PM »
I have been having a trawl round the Net whilst waiting for an answer and found info about etc/x11/xorg.conf. I loaded PCLOS Live and have managed to find it and it has the section:

Section "Monitor"
    Identifier "monitor1"
    VendorName "Generic"
    ModelName "Flat Panel 1280x800"
    HorizSync 31.5-50.0
    VertRefresh 56.0-65.0
EndSection

Questions
1. Is this the config file that holds the info for the screen display resolution?
2. If so is it just the 1280x800 I would need to change to 1024x768 or anything else?
3. I did try to edit it but when I came to save it it refused. Wrong permissions. Can I CHMOD permissions whilst using PCLOS Live?
4. If not through PCLOS Live, any other way? DOS?

Sorry to be asking so much but I'm really stuck.

Offline sling-shot

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Re: Video resolution not recognised by display
« Reply #2 on: November 11, 2012, 12:07:07 AM »
The section is correct.

First you need to find out the proper resolution that your monitor supports. So what computer do you use? Desktop or Laptop? If Desktop then what is your monitor model?
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Offline Phil

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Re: Video resolution not recognised by display
« Reply #3 on: November 11, 2012, 01:38:00 AM »
Hi Rebecca,

Congratulations on getting yourself into a pickle, good way to learn. Easy peasy (when you know how, of course)

Let the machine get as far as it can from startup (press Esc while it is wending it way to see how its doing).

Next we are going into a terminal session using a virtual tty.

Press at the same time Ctrl+Alt+F2
Log in as root:
>su
>passwd
#pcc  (or drakconf) (note the # at the start means you are root)
Use tab and arrow keys to fix
Then exit and
Ctrl+Alt+F8 to get to x session

Or going back to the tty:

shutdown -h now
or
shutdown -r now

Enjoy

Offline daniel

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Re: Video resolution not recognised by display
« Reply #4 on: November 11, 2012, 03:14:17 AM »
Open a terminal and type
Code: [Select]
root enter root password
and type
Code: [Select]
sed -i "22i\    Option \"PreferredMode\" \"1280x800\"" /etc/X11/xorg.confexit terminal, and restart your session (logout/in)

Daniel

Offline Just17

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Re: Video resolution not recognised by display
« Reply #5 on: November 11, 2012, 04:46:50 AM »
Having recently installed PCLOS Maya I did not like the default screen resolution ...

Is this a mis-type or is there something odd here?

You might post the output from running the following command in a terminal

uname  -a


« Last Edit: November 11, 2012, 04:56:02 AM by Just17 »
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Offline daniel

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Re: Video resolution not recognised by display
« Reply #6 on: November 11, 2012, 04:50:54 AM »
Quote
Having recently installed PCLOS Maya I did not like the default screen resolution ...

Is this a mis-type or is there something odd here?

You might post the output from running the following command in a terminal

uname  -a


Don't ask me...

Dear Rebecca_D ,

from who or where comes this Iso?

Offline Rebecca_D

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Re: Video resolution not recognised by display
« Reply #7 on: November 11, 2012, 10:44:50 AM »
Hi Guys. Thanks to all of you that took interest in my misguided handiwork  :-[ ! Thanks especially to Phil who's knowledge got me out of a hole of my own making ("Dad, stop fiddling with it", as my son would say). Regarding the 'Maya' quote. I am new to Linux, my Win7 having crashed beyond repair, and in trying to find a distro that I liked I installed MINT 13 Maya which failed to impress, so in my panic with the current problem my brain went to the wrong 'Linux installation type' folder and convinced me that I had installed PCLinuxOS Maya!! As they say, "There's no fool like an old fool" and I'm certainly feeling my age.

SOLVED

Ciao

Offline Rebecca_D

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Re: Video resolution not recognised by display
« Reply #8 on: November 11, 2012, 11:02:12 AM »
PS How do threads get marked SOLVED. Moderator task?

Offline daniel

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Re: Video resolution not recognised by display
« Reply #9 on: November 11, 2012, 11:06:29 AM »
go to first post, and click on Modify
type in Subject line <solved> Video reso....
and click on Post.
That's all  ;)