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Old 08-01-2006, 09:50 AM   #1
lugoteehalt
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how use widescreen TV as monitor?


A widescreen 16:9 TFT liquid chrystal TV. It works also as a monitor but it is widescreen and its own controls wont do much to help this. So everything is stretched sideways. How do I fix this? Please spell it out.

Thanks any help.
 
Old 08-01-2006, 11:45 AM   #2
lazlow
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I think that you have to have a video card that supports the wider format. If you compare you tv's manual to your video cards manual you will probably see a max resolution of something like 1460x768 (tv) vs 1024x768(video card).

lazlow
 
Old 08-01-2006, 11:49 AM   #3
IsaacKuo
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Say, how are you connecting the computer to this TV? Is it via an S-Video or Composite out connection? Or is it via a 15pin VGA connector? Or some sort of Ati component video dongle? Or SCART?

If it's via a 15pin VGA connector, then there's a good chance you'll be able to use a custom modeline to get what you need.

What model of TV is this? What model of video card are you using? We'll need to know to figure out what can be done.
 
Old 08-03-2006, 12:38 PM   #4
lugoteehalt
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Thanks girls.
Quote:
Originally Posted by IsaacKuo
Say, how are you connecting the computer to this TV? Is it via an S-Video or Composite out connection? Or is it via a 15pin VGA connector? Or some sort of Ati component video dongle? Or SCART?

If it's via a 15pin VGA connector, then there's a good chance you'll be able to use a custom modeline to get what you need.

What model of TV is this? What model of video card are you using? We'll need to know to figure out what can be done.
It's a VGA connector, assume 15 pin. The television's a Beko. I'll have to get back with the models.... Incidentally, tried putting DisplaySize 200 100, or some other figures, in XF86Config-4, Debian Sarge. This caused the laptop, which is connected to the TV, to go weird or to split the picture in two, but had no effect on the TV.
 
Old 08-03-2006, 01:44 PM   #5
IsaacKuo
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Are you using more than one display? If you have two monitors defined, then obviously you're going to want to change the settings on the TV monitor for adjusting that.

Either way, post your /etc/X11/xorg.conf. It seems you've got some complex issues going on. We still need to know what video "card" you're using, and knowing what model of TV may be helpful (to look up that TV's manual on the internet).

Unfortunately, when a TV set has a 15pin VGA connector it may be expecting some really weird things. Some TV sets expect only HDTV sync signals, in which case you'll probably have to be satisfied with 1280x720 (standard 720p) which is either scaled or letterboxed in the display. Some TV sets expect only standard computer resolution signals, which means widescreen modes aren't available. It's not clear exactly what your TV is expecting.
 
Old 08-05-2006, 09:44 AM   #6
lugoteehalt
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Code:
# XF86Config-4 (XFree86 X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.

Section "Device"
	Identifier	"Genlugo Video Card"
	Driver		"ati"
EndSection


#NEW STUFF PASTED IN FROM KNOPPIX'S XF86Config-4 FILE BETWEEN HERE AND 'KNOPPIX:-'
# Auto-generated by KNOPPIX mkxf86config

Section "Monitor"
	Identifier	"Monitor0"

#lugo Commented out next line - do not at all know if this is right! - because usr/share/doc/HOWTO/en-html/ACPI-HOWTO/daemons.html said it was wise.
#	Option	"DPMS"	"true"
#lugo Trying to get widscreen TV to have non stetched display. Told in another context that this would stop text from being small with high resolutions. Measurements are in mm.
#DisplaySize 100 50 
#	HorizSync    28.0 - 78.0 # Warning: This may fry very old Monitors
	HorizSync    28.0 - 96.0 # Warning: This may fry old Monitors
	VertRefresh  50.0 - 75.0 # Very conservative. May flicker.
#	VertRefresh  50.0 - 62.0 # Extreme conservative. Will flicker. TFT default.
	#  Default modes distilled from
	#      "VESA and Industry Standards and Guide for Computer Display Monitor
	#       Timing", version 1.0, revision 0.8, adopted September 17, 1998.
	#  $XFree86: xc/programs/Xserver/hw/xfree86/etc/vesamodes,v 1.4 1999/11/18 16:52:17 tsi Exp $
	# 640x350 @ 85Hz (VESA) hsync: 37.9kHz
	ModeLine "640x350"    31.5  640  672  736  832    350  382  385  445 +hsync -vsync
	# 640x400 @ 85Hz (VESA) hsync: 37.9kHz
	ModeLine "640x400"    31.5  640  672  736  832    400  401  404  445 -hsync +vsync
	# 720x400 @ 85Hz (VESA) hsync: 37.9kHz
	ModeLine "720x400"    35.5  720  756  828  936    400  401  404  446 -hsync +vsync
	# 640x480 @ 60Hz (Industry standard) hsync: 31.5kHz
	ModeLine "640x480"    25.2  640  656  752  800    480  490  492  525 -hsync -vsync
	# 640x480 @ 72Hz (VESA) hsync: 37.9kHz
	ModeLine "640x480"    31.5  640  664  704  832    480  489  491  520 -hsync -vsync
	# 640x480 @ 75Hz (VESA) hsync: 37.5kHz
	ModeLine "640x480"    31.5  640  656  720  840    480  481  484  500 -hsync -vsync
	# 640x480 @ 85Hz (VESA) hsync: 43.3kHz
	ModeLine "640x480"    36.0  640  696  752  832    480  481  484  509 -hsync -vsync
	# 800x600 @ 56Hz (VESA) hsync: 35.2kHz
	ModeLine "800x600"    36.0  800  824  896 1024    600  601  603  625 +hsync +vsync
	# 800x600 @ 60Hz (VESA) hsync: 37.9kHz
	ModeLine "800x600"    40.0  800  840  968 1056    600  601  605  628 +hsync +vsync
	# 800x600 @ 72Hz (VESA) hsync: 48.1kHz
	ModeLine "800x600"    50.0  800  856  976 1040    600  637  643  666 +hsync +vsync
	# 800x600 @ 75Hz (VESA) hsync: 46.9kHz
	ModeLine "800x600"    49.5  800  816  896 1056    600  601  604  625 +hsync +vsync
	# 800x600 @ 85Hz (VESA) hsync: 53.7kHz
	ModeLine "800x600"    56.3  800  832  896 1048    600  601  604  631 +hsync +vsync
	# 1024x768i @ 43Hz (industry standard) hsync: 35.5kHz
	ModeLine "1024x768"   44.9 1024 1032 1208 1264    768  768  776  817 +hsync +vsync Interlace
	# 1024x768 @ 60Hz (VESA) hsync: 48.4kHz
	ModeLine "1024x768"   65.0 1024 1048 1184 1344    768  771  777  806 -hsync -vsync
	# 1024x768 @ 70Hz (VESA) hsync: 56.5kHz
	ModeLine "1024x768"   75.0 1024 1048 1184 1328    768  771  777  806 -hsync -vsync
	# 1024x768 @ 75Hz (VESA) hsync: 60.0kHz
	ModeLine "1024x768"   78.8 1024 1040 1136 1312    768  769  772  800 +hsync +vsync
	# 1024x768 @ 85Hz (VESA) hsync: 68.7kHz
	ModeLine "1024x768"   94.5 1024 1072 1168 1376    768  769  772  808 +hsync +vsync
	# 1152x864 @ 75Hz (VESA) hsync: 67.5kHz
	ModeLine "1152x864"  108.0 1152 1216 1344 1600    864  865  868  900 +hsync +vsync
	# 1280x960 @ 60Hz (VESA) hsync: 60.0kHz
	ModeLine "1280x960"  108.0 1280 1376 1488 1800    960  961  964 1000 +hsync +vsync
	# 1280x960 @ 85Hz (VESA) hsync: 85.9kHz
	ModeLine "1280x960"  148.5 1280 1344 1504 1728    960  961  964 1011 +hsync +vsync
	# 1280x1024 @ 60Hz (VESA) hsync: 64.0kHz
	ModeLine "1280x1024" 108.0 1280 1328 1440 1688   1024 1025 1028 1066 +hsync +vsync
	# 1280x1024 @ 75Hz (VESA) hsync: 80.0kHz
	ModeLine "1280x1024" 135.0 1280 1296 1440 1688   1024 1025 1028 1066 +hsync +vsync
	# 1280x1024 @ 85Hz (VESA) hsync: 91.1kHz
	ModeLine "1280x1024" 157.5 1280 1344 1504 1728   1024 1025 1028 1072 +hsync +vsync
	# 1600x1200 @ 60Hz (VESA) hsync: 75.0kHz
	ModeLine "1600x1200" 162.0 1600 1664 1856 2160   1200 1201 1204 1250 +hsync +vsync
	# 1600x1200 @ 65Hz (VESA) hsync: 81.3kHz
	ModeLine "1600x1200" 175.5 1600 1664 1856 2160   1200 1201 1204 1250 +hsync +vsync
	# 1600x1200 @ 70Hz (VESA) hsync: 87.5kHz
	ModeLine "1600x1200" 189.0 1600 1664 1856 2160   1200 1201 1204 1250 +hsync +vsync
	# 1600x1200 @ 75Hz (VESA) hsync: 93.8kHz
	ModeLine "1600x1200" 202.5 1600 1664 1856 2160   1200 1201 1204 1250 +hsync +vsync
	# 1600x1200 @ 85Hz (VESA) hsync: 106.3kHz
	ModeLine "1600x1200" 229.5 1600 1664 1856 2160   1200 1201 1204 1250 +hsync +vsync
	# 1792x1344 @ 60Hz (VESA) hsync: 83.6kHz
	ModeLine "1792x1344" 204.8 1792 1920 2120 2448   1344 1345 1348 1394 -hsync +vsync
	# 1792x1344 @ 75Hz (VESA) hsync: 106.3kHz
	ModeLine "1792x1344" 261.0 1792 1888 2104 2456   1344 1345 1348 1417 -hsync +vsync
	# 1856x1392 @ 60Hz (VESA) hsync: 86.3kHz
	ModeLine "1856x1392" 218.3 1856 1952 2176 2528   1392 1393 1396 1439 -hsync +vsync
	# 1856x1392 @ 75Hz (VESA) hsync: 112.5kHz
	ModeLine "1856x1392" 288.0 1856 1984 2208 2560   1392 1393 1396 1500 -hsync +vsync
	# 1920x1440 @ 60Hz (VESA) hsync: 90.0kHz
	ModeLine "1920x1440" 234.0 1920 2048 2256 2600   1440 1441 1444 1500 -hsync +vsync
	# 1920x1440 @ 75Hz (VESA) hsync: 112.5kHz
	ModeLine "1920x1440" 297.0 1920 2064 2288 2640   1440 1441 1444 1500 -hsync +vsync
	# Additional modelines
	ModeLine "1800x1440"  230    1800 1896 2088 2392  1440 1441 1444 1490 +HSync +VSync
	ModeLine "1800x1440"  250    1800 1896 2088 2392  1440 1441 1444 1490 +HSync +VSync
	# Extended modelines with GTF timings
	# 640x480 @ 100.00 Hz (GTF) hsync: 50.90 kHz; pclk: 43.16 MHz
	ModeLine "640x480"  43.16  640 680 744 848  480 481 484 509  -HSync +Vsync
	# 768x576 @ 60.00 Hz (GTF) hsync: 35.82 kHz; pclk: 34.96 MHz
	ModeLine "768x576"  34.96  768 792 872 976  576 577 580 597  -HSync +Vsync
	# 768x576 @ 72.00 Hz (GTF) hsync: 43.27 kHz; pclk: 42.93 MHz
	ModeLine "768x576"  42.93  768 800 880 992  576 577 580 601  -HSync +Vsync
	# 768x576 @ 75.00 Hz (GTF) hsync: 45.15 kHz; pclk: 45.51 MHz
	ModeLine "768x576"  45.51  768 808 888 1008  576 577 580 602  -HSync +Vsync
	# 768x576 @ 85.00 Hz (GTF) hsync: 51.42 kHz; pclk: 51.84 MHz
	ModeLine "768x576"  51.84  768 808 888 1008  576 577 580 605  -HSync +Vsync
	# 768x576 @ 100.00 Hz (GTF) hsync: 61.10 kHz; pclk: 62.57 MHz
	ModeLine "768x576"  62.57  768 816 896 1024  576 577 580 611  -HSync +Vsync
	# 800x600 @ 100.00 Hz (GTF) hsync: 63.60 kHz; pclk: 68.18 MHz
	ModeLine "800x600"  68.18  800 848 936 1072  600 601 604 636  -HSync +Vsync
	# 1024x768 @ 100.00 Hz (GTF) hsync: 81.40 kHz; pclk: 113.31 MHz
	ModeLine "1024x768"  113.31  1024 1096 1208 1392  768 769 772 814  -HSync +Vsync
	# 1152x864 @ 60.00 Hz (GTF) hsync: 53.70 kHz; pclk: 81.62 MHz
	ModeLine "1152x864"  81.62  1152 1216 1336 1520  864 865 868 895  -HSync +Vsync
	# 1152x864 @ 85.00 Hz (GTF) hsync: 77.10 kHz; pclk: 119.65 MHz
	ModeLine "1152x864"  119.65  1152 1224 1352 1552  864 865 868 907  -HSync +Vsync
	# 1152x864 @ 100.00 Hz (GTF) hsync: 91.50 kHz; pclk: 143.47 MHz
	ModeLine "1152x864"  143.47  1152 1232 1360 1568  864 865 868 915  -HSync +Vsync
	# 1280x960 @ 72.00 Hz (GTF) hsync: 72.07 kHz; pclk: 124.54 MHz
	ModeLine "1280x960"  124.54  1280 1368 1504 1728  960 961 964 1001  -HSync +Vsync
	# 1280x960 @ 75.00 Hz (GTF) hsync: 75.15 kHz; pclk: 129.86 MHz
	ModeLine "1280x960"  129.86  1280 1368 1504 1728  960 961 964 1002  -HSync +Vsync
	# 1280x960 @ 100.00 Hz (GTF) hsync: 101.70 kHz; pclk: 178.99 MHz
	ModeLine "1280x960"  178.99  1280 1376 1520 1760  960 961 964 1017  -HSync +Vsync
	# 1280x1024 @ 100.00 Hz (GTF) hsync: 108.50 kHz; pclk: 190.96 MHz
	ModeLine "1280x1024"  190.96  1280 1376 1520 1760  1024 1025 1028 1085  -HSync +Vsync
	# 1400x1050 @ 60.00 Hz (GTF) hsync: 65.22 kHz; pclk: 122.61 MHz
	ModeLine "1400x1050"  122.61  1400 1488 1640 1880  1050 1051 1054 1087  -HSync +Vsync
	# 1400x1050 @ 72.00 Hz (GTF) hsync: 78.77 kHz; pclk: 149.34 MHz
	ModeLine "1400x1050"  149.34  1400 1496 1648 1896  1050 1051 1054 1094  -HSync +Vsync
	# 1400x1050 @ 75.00 Hz (GTF) hsync: 82.20 kHz; pclk: 155.85 MHz
	ModeLine "1400x1050"  155.85  1400 1496 1648 1896  1050 1051 1054 1096  -HSync +Vsync
	# 1400x1050 @ 85.00 Hz (GTF) hsync: 93.76 kHz; pclk: 179.26 MHz
	ModeLine "1400x1050"  179.26  1400 1504 1656 1912  1050 1051 1054 1103  -HSync +Vsync
	# 1400x1050 @ 100.00 Hz (GTF) hsync: 111.20 kHz; pclk: 214.39 MHz
	ModeLine "1400x1050"  214.39  1400 1512 1664 1928  1050 1051 1054 1112  -HSync +Vsync
	# 1600x1200 @ 100.00 Hz (GTF) hsync: 127.10 kHz; pclk: 280.64 MHz
	ModeLine "1600x1200"  280.64  1600 1728 1904 2208  1200 1201 1204 1271  -HSync +Vsync
	# 1920x1200 @ 60.00 Hz (GTF)  hsync: 74.52; pclk: 193.16 MHz
	Modeline "1920x1200" 193.16  1920 2048 2256 2592  1200 1201 1204 1242  -HSync +HSync
EndSection

Section "Device"
	### Available Driver options are:-
# sw_cursor is needed for some ati and radeon cards
Option "sw_cursor"
        #Option     "hw_cursor"
        #Option     "NoAccel"
        #Option     "ShowCache"
        #Option     "ShadowFB"
        #Option     "UseFBDev"
        #Option     "Rotate"
	Identifier  "Card0"
# The following line is auto-generated by KNOPPIX mkxf86config
	Driver      "ati"
	VendorName  "All"
	BoardName   "All"
#	BusID       "PCI:1:0:0"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	DefaultColorDepth 16
	SubSection "Display"
		Depth     1
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth     4
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth     8
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth     15
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth     16
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth     24
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth     32
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "DRI"
	Mode 0666
EndSection

#KNOPPIX:-



Here's the models:

Beko 17" L5C LCD TV.

16:9 Active matrix TFT

scanpci output:
pci bus 0x0001 cardnum 0x00 function 0x00: vendor 0x1002 device 0x4c46
 ATI Technologies Inc Rage Mobility M3 AGP 2x
Sorry about delay.

Just plugging TV into back of laptop with no change to the X config file.
 
Old 08-05-2006, 10:01 AM   #7
IsaacKuo
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Okay, I'm not positive what the capabilities of Ati Rage mobility are (I'm assuming that's correct). I did play around with Powerstrip on a Windows XP laptop with Ati onboard graphics...I didn't do very much but I did figure at that at the very least it can't handle interlaced modes. That isn't a concern for you, but that was a deal-breaker for me so I stopped messing with it.

Now then, this looks like a Knoppix hard drive install (debian style)...maybe an older version since it's still using XFree rather than Xorg? No matter; the same advice applies.

Basically, there are three things you may need to modify in order to get your custom resolution to work:

1. Make sure the Monitor has HorizSync and VertRefresh suitable for the desired resolution. This looks good.

2. Put a custom ModeLine in the Monitor section for the desired resolution. It looks like you've tried to add a modeline for "1800x1440". Is that your TV's native resolution? This may be good, or it might need tweaking or recalculation.

and

3. Put the desired custom resolution in the list of "Modes" in the Screen section. Technically, you only need to put it in the Modes list of the DefaultColorDepth. The mode which is used by default is the first one on that list. THIS NEEDS TO BE CHANGED!!! Right now, you've got:

Code:
		Depth     16
		Modes "1024x768" "800x600" "640x480"
This needs to be changed to:
Code:
		Depth     16
		Modes "1800x1440" "1024x768" "800x600" "640x480"
Otherwise, it will try to use 1024x768 as its default resolution.

Note that I never said that changing the DisplaySize would change the aspect ratio of the screen. It doesn't. X applications assume square pixels.
 
Old 08-05-2006, 10:09 AM   #8
IsaacKuo
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Oh...I would be really surprised if your TV supports 1800x1440 resolution. I tried looking up "Beko LCD", and I think that the native resolution you want is "1280x768". Using the web based Cola's Free Modeline Generator, I get this:

Code:
ModeLine "1280x768" 83.77 1280 1336 1616 1728 768 770 782 808 #60Hz
This assumes a vertical refresh rate of 60hz, which is pretty standard for HDTV sets (sorry, PALs ). Add this Modeline into your Monitor section, and change the list of modelines to:

Code:
		Depth     16
		Modes "1280x768" "1024x768" "800x600" "640x480"
 
Old 08-08-2006, 04:38 AM   #9
lugoteehalt
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Sorry to be brain-dead, but I need another
Section "Monitor"
Identifier "Monitor0"
Section do I??

But this time "Monitor1"??

Then I take your advice after that?

Anyway I'll try that.
 
Old 08-08-2006, 06:29 AM   #10
IsaacKuo
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No, not unless you want to set up a multi-monitor setup. I doubt your laptop is capable of multi-monitor anyway. Note that you might only do custom resolutions if the laptop boots up with the built-in screen closed. Otherwise, the hardware might force 1024x768 resolution even if the software might want to use a different resolution.

When I was fiddling with my old laptop, I found that if the screen were open at boot-up, the two video outputs would be "mirrored" and the built-in screen would force in 1024x768@60 no matter what. The only way to get any other resolution on the VGA output was to turn on the computer with the screen closed--so only the VGA output was active. After turning on the computer in that mode, opening up the screen would NOT turn on the built-in screen. I suspect that any time the built-in screen is activated, the mode would force to 1024x768. This laptop used Ati Rage Mobility on-board graphics. These are HARDWARE LIMITATIONS, and you can't get around them with software.

Note that I'm making some assumptions about what you're trying to do based on what little you've described so far. It would have been helpful if, at the start, you mentioned that you were using a laptop computer with Ati Rage Mobility graphics (I'm guessing that's what your graphics is, based on what Knoppix guessed). Also, it would have been helpful to know that you're using a Knoppix install (again, I'm guessing this, based on your XF86Config-4--oh, I'm guessing that it's /etc/X11/XF86Config-4, based on what your posted config file says)...

So anyway, I'm also guessing that what you're trying to do is use a single display--just the TV--and you do NOT want to also use the built-in display. I'm just guessing this, because you never said. If you're hoping to use both displays, with the built-in display mirroring, then I'm pretty sure it can't be done. But again, I'm just guessing because I don't actually know what graphics chipset you're using (you never said). If you're hoping to use both displays, with different output to the TV as the built-in display, then I'm pretty sure it can't be done. But again, I'm just guessing because I don't actually know what graphics chipset you're using (you never said).

As I've said before, we need to know what hardware you're using, and what operating system you're using, in order to troubleshoot video problems.
 
Old 08-10-2006, 01:21 PM   #11
lugoteehalt
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Very good idea - booting with the lid sown. You could go for a year and not think of that.
 
Old 08-16-2006, 03:35 AM   #12
lugoteehalt
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Quote:
Originally Posted by IsaacKuo
As I've said before, we need to know what hardware you're using, and what operating system you're using, in order to troubleshoot video problems.
It's a Debian Sarge installation. I couldn't be bothered configuring X during the install so I just ran the Knoppix live CD afterwards and then pasted in the monitor-type stuff from its XF86Config file.

The video card is: pci bus 0x0001 cardnum 0x00 function 0x00: vendor 0x1002 device 0x4c46
ATI Technologies Inc Rage Mobility M3 AGP 2x.

Was thinking of just plugging the wide-screen TV into the VGA female on the back of the laptop, doesn't really matter if the laptop screen works as well.

Thanks for your help.
 
  


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