I don't know if this is a bug. It seems like one to me.
I have a Viewsonic N3250W LCD display, which has a maximum resolution of 1360 x 768. My neighbor has some other brand of plasma display but which has the same maximum resolution.
While showing off her new display, my neighbor had mentioned she would like to use it as a computer monitor. I have several old computers gathering dust, so I told her I'd see if one would do what she wanted. First I connected it to my LCD display, to test it and to set up a multisession Puppy DVD for her. Xorg reported that my display was capable of 1360 x 768 but that the video card (on-board Intel 815) might not be. Sure enough, the maximum resolution that would work was 1024 x 768 (or something like that.)
Imagine my surprise when the same computer worked my neighbor's 1360 x 768 plasma display at its full resolution.
Can anyone suggest why Xorg works my neighbor's display at 1360 when it will only work mine at 1024, using the same computer?
(By the way, my neighbor took to Puppy like a duck to water. )
Xorg video resolution depends on display?
- Béèm
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[OT]
Is your neighbor female?
[/OT]
Seriously now, I can't see a reason why this is so.
Bad connection when you tried at home?
Is your neighbor female?
[/OT]
Seriously now, I can't see a reason why this is so.
Bad connection when you tried at home?
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It might depend on the video driver. Look for the Driver-entry in the Device-Section of xorg.conf. Some drivers do only support resolutions with 4:3 ratios.
Another problem might araise from missing information about the display. Try ddcprobe on both displays. This will show you what possible resolutions the displays report.
I'm interested in gathering as much information about (problematic) graphics adapter / display combinations as possible for the "New X-Wizard" project. (see: http://www.murga-linux.com/puppy/viewtopic.php?t=23468)
Another problem might araise from missing information about the display. Try ddcprobe on both displays. This will show you what possible resolutions the displays report.
I'm interested in gathering as much information about (problematic) graphics adapter / display combinations as possible for the "New X-Wizard" project. (see: http://www.murga-linux.com/puppy/viewtopic.php?t=23468)
Thanks, leachim. I'll post the results of ddcprobe to this thread as soon as I can run it on both displays from the computer in question. It will be from Puppy 3.01, as ddcprobe locked up my computer when I ran it in Dingo 392.
Is there any other information you would like as well?
Is there any other information you would like as well?
[url=http://www.murga-linux.com/puppy/viewtopic.php?t=69321][color=blue]Puppy Help 101 - an interactive tutorial for Lupu 5.25[/color][/url]
Results of running ddcprobe in Puppy Dingo4 alpha3 on a Gigabyte GA-MA69GM-S2H motherboard with onboard video, connected to my Viewsonic N3250w display via HDMI:
- # ddcprobe
vbe: VESA 3.0 detected.
oem: ATI ATOMBIOS
vendor: (C) 1988-2005, ATI Technologies Inc.
product: RS690 01.00
memory: 16384kb
mode: 640x400x256
mode: 640x480x256
mode: 800x600x256
mode: 1024x768x256
mode: 1280x1024x256
mode: 640x480x64k
mode: 800x600x64k
mode: 1024x768x64k
mode: 1280x1024x64k
mode: 320x200x64k
mode: 1600x1200x256
mode: 1600x1200x32k
mode: 1600x1200x64k
edid:
edid: 1 3
id: 101c
eisa: VSC101c
serial: dadb6101
manufacture: 46 2005
input: analog signal.
screensize: 70 39
gamma: 2.200000
dpms: RGB, active off, no suspend, no standby
timing: 720x400@70 Hz (VGA 640x400, IBM)
timing: 640x480@60 Hz (VGA)
timing: 640x480@75 Hz (VESA)
timing: 800x600@75 Hz (VESA)
timing: 1024x768@87 Hz Interlaced (8514A)
timing: 1024x768@75 Hz (VESA)
ctiming: 1280x1024@60
ctiming: 640x640@70
dtiming: 1360x768@70
monitorserial: PS40546C0807
monitorrange: 30-64, 60-75
monitorname: N3250w
#
915resolution
The 915resolution trick is being discussed here:
http://murga-linux.com/puppy/viewtopic.php?t=24814
What it does is to run this in console: 915resolution -l
(that's an L)
and then pick a number for assigning your chosen resolution (38 has been suggested for 800 px wide resolution): 915resolution 38 xxx yyy colordepth. For my example, I used 915resolution 43 800 480 16
http://murga-linux.com/puppy/viewtopic.php?t=24814
What it does is to run this in console: 915resolution -l
(that's an L)
and then pick a number for assigning your chosen resolution (38 has been suggested for 800 px wide resolution): 915resolution 38 xxx yyy colordepth. For my example, I used 915resolution 43 800 480 16
Puppy user since Oct 2004. Want FreeOffice? [url=http://puppylinux.info/topic/freeoffice-2012-sfs]Get the sfs (English only)[/url].
- Dougal
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Re: Xorg video resolution depends on display?
It might have to do with the refresh-rates your screen works at: the xorgwizard makes a very conservative estimate of the rates, but in some cases it might be wrong.Flash wrote:Can anyone suggest why Xorg works my neighbor's display at 1360 when it will only work mine at 1024, using the same computer?
Some LCD screens work at 20 Hz (or whatever it is), while Puppy usually won't allow it to go beneath 30 or something.
There's also the matter of 1360 vs 1366 and all that -- I can't remember the details now...
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