View Full Version : Connecting to a remote monitor.
16th April 2011, 05:03 AM
HP Mini 210 Netbook screen 1024x600
External Monitor 1360x768
Fedora 15 with latest updates
Everytime I connect my netbook to my monitor I thought that the screen resolution on the monitor would use its native setting. However, when I connect it uses a screen resolution size 1024x768.
My question is, is there anyway I can use the monitor native resolution which should be 1360x768?
Many thanks for any suggestions,
16th April 2011, 06:19 AM
Examine /var/log/Xorg.0.log and see if the size is listed.
Better yet do
and examine the list of modes to see if 1366x600 is there.
If so then you can do a ...
xrandr --output LCD1 --mode 1366x600
or whatver the connected interace and the resolution is.
Ultimately you may want to create a /etc/X11/xorg.conf.d/xxx file for it. Search this forum for examples.
16th April 2011, 04:55 PM
Thank for your reply.
I have tried the following, but it still failed to set the display.
Screen 0: minimum 320 x 200, current 2048 x 768, maximum 4096 x 4096
LVDS1 connected 1024x600+0+168 (normal left inverted right x axis y axis) 222mm x 125mm
800x600 60.3 56.2
VGA1 connected 1024x768+1024+0 (normal left inverted right x axis y axis) 0mm x 0mm
800x600 60.3 56.2
[steve@stevenet ~]$ sudo xrandr --output LVDS1 --mode 1360x768
xrandr: cannot find mode 1360x768
Thanks for any more suggestions,
18th April 2011, 04:46 PM
Any update for this issue.
19th April 2011, 12:07 AM
the external monitor is claiming 1024x768 as its highest available resolution. Is this 'external monitor', perchance, a TV? What I've found with TVs is that some aren't actually capable of their native resolution when connected via VGA; I dunno why this is, though I'm guessing they're cheaping out on ADCs. You can only actually get the native resolution via DVI or HDMI. My TV is like this - it's a 1080p TV but can only do 1024x768 over VGA. If you check the manual this may even be explained there.
19th April 2011, 01:16 AM
the external monitor is claiming 1024x768 as its highest available resolution
HONK - wrong - but thanks for playing spout-some-baloney.
The EDID data that describes terminal characteristics only applies to digital interfaces, LVDS(LCD), HDMI, DP NOT TO VGA. The analog VGA has no reliable scheme for assessing the resolution of the attached monitor; never has, never will. It's another good reason to get rig of those lousy legacy VGA bits. The external VGA connected monitor can't "claim" anything about it's resolution.
The OP will have to create an appropriate mode for 1366x768 (the standard size). Ther eis an example at the end of the "man xrandr" manual page, but to develop the correct numbers the OP would need to understand the bitclock rate for his vid card. It's not entirely trivial.
The manual page gives an example ...
Forces to use a 1024x768 mode on an output called VGA:
xrandr --newmode "1024x768" 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync
xrandr --addmode VGA 1024x768
xrandr --output VGA --mode 1024x768
My very ballparky guesstimate is that the OP could try;
xrandr --newmode "1366x768" 60.00 1366 1440 1568 1760 768 771 775 798 -hsync +vsync
xrandr --addmode VGA1 1366x768
xrandr --output VGA1 --mode 1366x768
If when you use these commands, nothing good happens, then look thru /var/log/Xorg.0.log. If the bitcloct rate complains try tweaking the 60.00 downward by a few percent.
19th April 2011, 04:40 PM
I am using a LED TV/Monitor Samsung 26inch series 4 4000.
when I typed the command in. On the Monitor it said "Resolution is not supported"
I checked the log and changed the setting to this:
$ xrandr --newmode "1360x768"x0.0 54.20 1024 1117 1152 1328 600 641 646 680 -hsync -vsync
$ xrandr --addmode VGA1 1360x768
$ xrandr --output VGA1 --mode 1360x768
I got the same mesage on the monitor. So I guess the monitor does support it.
If you want I can send you the log if you are totally convinced that I can get the 1360x768?
20th April 2011, 08:35 PM
"The EDID data that describes terminal characteristics only applies to digital interfaces, LVDS(LCD), HDMI, DP NOT TO VGA. The analog VGA has no reliable scheme for assessing the resolution of the attached monitor; never has, never will. It's another good reason to get rig of those lousy legacy VGA bits. The external VGA connected monitor can't "claim" anything about it's resolution."
This is, um, not remotely true. See https://secure.wikimedia.org/wikipedia/en/wiki/Display_Data_Channel . DDC has provided a method for transmitting EDID-formatted display capabilities via a VGA connector since 1996.
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