Dear Experts,
My machine is using Fedora. The current resolution display is 1024x768_60Hz and it shows flickerring every now and then. I know that the max screen resolution can handle is 1280x1024_60Hz but I cant change it by simply go to display preference. Under the display preferences the max resolution option is 1024x768 which is currently use.
At the back of the machine, the display output is DVI port but then the installation here is converted to VGA port (via DVI to VGA adapter) and from the VGA port comes to a VGA splitter then connected to 3 monitors.
Yesterday I did try to modify the xorg.conf file as following (the one that I added is on the red) Section "Monitor" (mon "0") ... ... Modeline "1280x1024_60" Option "PreferredMode" "1280x1024_60"
Section "Screen" ... ... Modes "1280x1024_60"
From the above list, the first modification that I enter on the xorg.conf file was the Option under the "Monitor" section and the Modes under the "Screen" section. After I rebooted, the resolution was not changing. It still doing the same.
Then After I added the "Modeline" and did reboot. The system was hung up at the fedora symbol. I managed to restore back the original xorg.conf by went to the single user mode.
It's now up and running again with the original resolution 1024x768 and it still flickering.
Do I enter a wrong format under the Modeline? Or is there any other way to set the resolution up to max in fedora?
Please kindly help, Triadi
On Sat, 2011-03-05 at 18:37 +0000, Triadi Krisnawan wrote:
Dear Experts,
My machine is using Fedora. The current resolution display is 1024x768_60Hz and it shows flickerring every now and then. I know that the max screen resolution can handle is 1280x1024_60Hz but I cant change it by simply go to display preference. Under the display preferences the max resolution option is 1024x768 which is currently use.
At the back of the machine, the display output is DVI port but then the installation here is converted to VGA port (via DVI to VGA adapter) and from the VGA port comes to a VGA splitter then connected to 3 monitors.
Yesterday I did try to modify the xorg.conf file as following (the one that I added is on the red) Section "Monitor" (mon "0") ... ... Modeline "1280x1024_60" Option "PreferredMode" "1280x1024_60"
Section "Screen" ... ... Modes "1280x1024_60"
Triadi,
Two possibilities.
(1) Your VGA splitter device might limit its output resolution to 1024x768. That's common with VGA-type KVMs.
(2) Your Modeline statement looks incomplete. Try using the gtf utility: $ gtf 1280 1024 60 You'll get an output line that looks like this: # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Try copying and pasting those two lines into your xorg.conf file. I had to replace the underscore '_' character in the double-quotes string with a space ' ' to get it to work in my system.
Hope this helps.
--Doc Savage Fairview Heights, IL
Hi Doc,
Thanks for the info. I think I could take off the first posibility because it was working fine before with higher resolution 4 weeks ago. But after I rebooted the machine went to lower resolution (1024x768) and started flickering. So the KVM might not be the problem.
I will try to use the gft command. I am assuming that this command can run in any terminal right? And also which are the two lines to be copy? Are they : 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
Or Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Thanks Doc, Triadi
Triadi,
Two possibilities.
(1) Your VGA splitter device might limit its output resolution to 1024x768. That's common with VGA-type KVMs.
(2) Your Modeline statement looks incomplete. Try using the gtf utility: $ gtf 1280 1024 60 You'll get an output line that looks like this: # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Try copying and pasting those two lines into your xorg.conf file. I had to replace the underscore '_' character in the double-quotes string with a space ' ' to get it to work in my system.
Hope this helps.
--Doc Savage Fairview Heights, IL
-- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
On 03/05/2011 04:35 PM, Triadi Krisnawan wrote:
Hi Doc,
Thanks for the info. I think I could take off the first posibility because it was working fine before with higher resolution 4 weeks ago. But after I rebooted the machine went to lower resolution (1024x768) and started flickering. So the KVM might not be the problem.
I will try to use the gft command. I am assuming that this command can run in any terminal right? And also which are the two lines to be copy? Are they : 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
Or Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Thanks Doc, Triadi
Triadi,
Two possibilities.
(1) Your VGA splitter device might limit its output resolution to 1024x768. That's common with VGA-type KVMs.
(2) Your Modeline statement looks incomplete. Try using the gtf utility: $ gtf 1280 1024 60 You'll get an output line that looks like this: # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Try copying and pasting those two lines into your xorg.conf file. I had to replace the underscore '_' character in the double-quotes string with a space ' ' to get it to work in my system.
Hope this helps.
--Doc Savage Fairview Heights, IL
-- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
=
Hey Triadi,
The second line is wrapped in the output above.
Try stretching your terminal window wider first, then run the command. You will only get two lines in the terminal. Use them both, with the edit suggested, and that might work.
Oh you are right.. My bad :-) Thanks a lot guys.. to quick to read.. :-p I'll try it once I have the access on the machine later on..
I'll keep updating if anything..
Triadi
Date: Sat, 5 Mar 2011 20:05:28 -0500 From: marklapier@aol.com To: users@lists.fedoraproject.org Subject: Re: How to change screen resolution
On 03/05/2011 04:35 PM, Triadi Krisnawan wrote:
Hi Doc,
Thanks for the info. I think I could take off the first posibility because it was working fine before with higher resolution 4 weeks ago. But after I rebooted the machine went to lower resolution (1024x768) and started flickering. So the KVM might not be the problem.
I will try to use the gft command. I am assuming that this command can run in any terminal right? And also which are the two lines to be copy? Are they : 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
Or Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Thanks Doc, Triadi
Triadi,
Two possibilities.
(1) Your VGA splitter device might limit its output resolution to 1024x768. That's common with VGA-type KVMs.
(2) Your Modeline statement looks incomplete. Try using the gtf utility: $ gtf 1280 1024 60 You'll get an output line that looks like this: # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Try copying and pasting those two lines into your xorg.conf file. I had to replace the underscore '_' character in the double-quotes string with a space ' ' to get it to work in my system.
Hope this helps.
--Doc Savage Fairview Heights, IL
-- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
= Hey Triadi,
The second line is wrapped in the output above.
Try stretching your terminal window wider first, then run the command. You will only get two lines in the terminal. Use them both, with the edit suggested, and that might work.
On Sat, 2011-03-05 at 21:35 +0000, Triadi Krisnawan wrote:
Hi Doc,
Thanks for the info. I think I could take off the first posibility because it was working fine before with higher resolution 4 weeks ago. But after I rebooted the machine went to lower resolution (1024x768) and started flickering. So the KVM might not be the problem.
I will try to use the gft command. I am assuming that this command can run in any terminal right? And also which are the two lines to be copy? Are they : 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
Or Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Thanks Doc, Triadi
Two possibilities.
(1) Your VGA splitter device might limit its output resolution to 1024x768. That's common with VGA-type KVMs.
(2) Your Modeline statement looks incomplete. Try using the gtf
utility:
$ gtf 1280 1024 60 You'll get an output line that looks like this: # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Try copying and pasting those two lines into your xorg.conf file. I
had
to replace the underscore '_' character in the double-quotes string
with
a space ' ' to get it to work in my system.
Hope this helps.
Triadi,
The gtf utility actually outputs two lines. The second shown in my reply wraps onto a third line. It should be clear when you run the gtf utility yourself.
--Doc
Hi gents,
I've tried using gtf utility and copy the two lines to xorg.conf file and tried restart the machine, no changes happened. I've also tried to change the "_" with just a space and still not working.
I did notice that for a blink when the fedora logo appears befor login window that the resolution was changed but then change back to lower resolution when it was on the login window.
Please kindly advise what did I missed here?
Rgds, Triadi
Subject: RE: How to change screen resolution From: dsavage@peaknet.net To: users@lists.fedoraproject.org Date: Sat, 5 Mar 2011 20:54:04 -0600
On Sat, 2011-03-05 at 21:35 +0000, Triadi Krisnawan wrote:
Hi Doc,
Thanks for the info. I think I could take off the first posibility because it was working fine before with higher resolution 4 weeks ago. But after I rebooted the machine went to lower resolution (1024x768) and started flickering. So the KVM might not be the problem.
I will try to use the gft command. I am assuming that this command can run in any terminal right? And also which are the two lines to be copy? Are they : 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
Or Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Thanks Doc, Triadi
Two possibilities.
(1) Your VGA splitter device might limit its output resolution to 1024x768. That's common with VGA-type KVMs.
(2) Your Modeline statement looks incomplete. Try using the gtf
utility:
$ gtf 1280 1024 60 You'll get an output line that looks like this: # 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
Try copying and pasting those two lines into your xorg.conf file. I
had
to replace the underscore '_' character in the double-quotes string
with
a space ' ' to get it to work in my system.
Hope this helps.
Triadi,
The gtf utility actually outputs two lines. The second shown in my reply wraps onto a third line. It should be clear when you run the gtf utility yourself.
--Doc
-- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
On Tue, 2011-03-08 at 15:44 +0000, Triadi Krisnawan wrote:
Hi gents,
I've tried using gtf utility and copy the two lines to xorg.conf file and tried restart the machine, no changes happened. I've also tried to change the "_" with just a space and still not working.
I did notice that for a blink when the fedora logo appears befor login window that the resolution was changed but then change back to lower resolution when it was on the login window.
Please kindly advise what did I missed here?
Triadi,
It may be time to see if /var/log/Xorg.0.log can help. Search that file for any lines containing (EE).
--Doc
-
Mark LaPierre -
Robert G. (Doc) Savage -
Triadi Krisnawan