915resolution in 1680x1050

Message

adekoba · Post by **adekoba** » Sun Mar 11, 2007 3:24 pm

I recently bought a new monitor (Dell E207WFP) and i'm trying to get it to work with its optimum resolution of 1680x1050 (1280x1024 and others work). My graphics card, i865, supports all resolutions up into the 2000's so it shouldn't be a problem, but for some reason it is.

Every time I `startx` with everything set for 1680x1050, my monitor pops up a message reading "Cannot Open Display". Nothing shows up on the monitor, but I can tell it's working because the startup sounds of gnome work.

This is what i run for 915resolution:

915resolution 5a 1680 1050 16

xorg.conf:

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Section "Device"
	Identifier	"Intel Corporation 82865G Integrated Graphics Controller"
	Driver		"i810"
	BusID		"PCI:0:2:0"
	Option "ForceBIOS" "1600x1200=1680x1050"
EndSection

Section "Monitor"
	Identifier	"DELL E207WFP"
	Option		"DPMS"
	HorizSync 30-83
        VertRefresh 56-75
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"Intel Corporation 82865G Integrated Graphics Controller"
	Monitor		"DELL E207WFP"
	DefaultDepth	16	
	SubSection "Display"
		Depth		1
		Modes		"1680x1050" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1680x1050" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1680x1050" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1680x1050" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1680x1050" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1680x1050" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"
	EndSubSection
EndSection

I'd really appreciate any recommendations on what to do. Thanks.

Post by **NeddySeagoon** » Sun Mar 11, 2007 3:36 pm

dark_speedo,

Xorg only has VESA standard 4:3 resolutions preprogrammed.
You need a modeline to tell Xorg how to generate the wide screen resolution.

adekoba · Post by **adekoba** » Sun Mar 11, 2007 3:48 pm

Thanks for the response !

So I added this modeline to the monitor section:

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Modeline "1680x1050@60" 146.2 1680 1784 1960 2240 1050 1053 1059 1089

and changed the display section for 16 bits to:

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	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1680x1050@60" "1280x1024" "1152x864" "1024x768" "800x600" "720x400" "640x480"

but still, no luck. Everything starts up, it just doesn't display on the monitor.

Here is the 915resolution listing:

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Intel 800/900 Series VBIOS Hack : version 0.5.2

Chipset: 865G
BIOS: TYPE 2
Mode Table Offset: $C0000 + $353
Mode Table Entries: 18

Mode 30 : 640x480, 8 bits/pixel
Mode 32 : 800x600, 8 bits/pixel
Mode 34 : 1024x768, 8 bits/pixel
Mode 38 : 1280x1024, 8 bits/pixel
Mode 3a : 1680x1050, 8 bits/pixel
Mode 3c : 1920x1440, 8 bits/pixel
Mode 41 : 640x480, 16 bits/pixel
Mode 43 : 800x600, 16 bits/pixel
Mode 45 : 1024x768, 16 bits/pixel
Mode 49 : 1280x1024, 16 bits/pixel
Mode 4b : 1680x1050, 16 bits/pixel
Mode 4d : 1920x1440, 16 bits/pixel
Mode 50 : 640x480, 32 bits/pixel
Mode 52 : 800x600, 32 bits/pixel
Mode 54 : 1024x768, 32 bits/pixel
Mode 58 : 1280x1024, 32 bits/pixel
Mode 5a : 1680x1050, 32 bits/pixel
Mode 5c : 1920x1440, 32 bits/pixel

Post by **NeddySeagoon** » Sun Mar 11, 2007 4:27 pm

dark_speedo,

Your xorg.conf tells us what you asked Xorg to do. The /var/log/Xorg.0.log tells us what Xorg actually did.
The two don't always match. Please post the entire contents of both files.

adekoba · Post by **adekoba** » Sun Mar 11, 2007 4:50 pm

/var/log/Xorg.0.log : http://stashbox.org/14403/log
xorg.conf : http://stashbox.org/14404/xorg

adekoba · Post by **adekoba** » Sun Mar 11, 2007 9:43 pm

this xorg.conf worked with another video card I have (ati 9250), but it's extremely slow and almost unusable. this must mean that the modeline is right (if the dot pitch is for the monitor, i can't remember), but i can't figure out what's causing the problem.

Post by **NeddySeagoon** » Sun Mar 11, 2007 11:03 pm

dark_speedo,

Your modeline is correct, as this snippet of your log shows

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(II) I810(0): Supported additional Video Mode:
(II) I810(0): clock: 146.2 MHz   Image Size:  430 x 270 mm
(II) I810(0): h_active: 1680  h_sync: 1784  h_sync_end 1960 h_blank_end 2240 h_border: 0
(II) I810(0): v_active: 1050  v_sync: 1053  v_sync_end 1059 v_blanking: 1089 v_border: 0

Further down, it says

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(II) I810(0): Increasing the scanline pitch to allow tiling mode (1680 -> 2048).
(--) I810(0): Virtual size is 1680x1050 (pitch 2048)

so 1680x1050 is in use. This is a bit worrying (

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WW) I810(0): Successfully set original devices
(WW) I810(0): Setting the original video mode instead of restoring
	the saved state
(II) I810(0): BIOS call 0x5f05 not supported, setting refresh with VBE 3 method.

Look in your kernel config to see if you have

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Enable VM86 support (VM86)

on.
Its needed to run 16 bit BIOS code.

adekoba · Post by **adekoba** » Sun Mar 11, 2007 11:06 pm

looks like I do:

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/home/justin: cat /etc/kernels/kernel-config-x86-2.6.20-gentoo | grep VM86
CONFIG_VM86=y

Post by **NeddySeagoon** » Mon Mar 12, 2007 9:12 pm

dark_speedo,

There are several issues here - the pixel buffer resolution, which is what Xorg draws and the window into the pixel buffer you see on the screen, the two are often the same but they need not be.

You virtual resolution is 1680x1050 - that the pixel buffer in the Video Ram.
If you can only see a part of that on the screen the window into the pixel buffer will scroll as you approach the edges of the display - does it?

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emerge xvidtune

It will show how the display is operating. It should show you the numbers in your modeline.
Does it ?
If not, what does it say?

adekoba · Post by **adekoba** » Mon Mar 12, 2007 9:25 pm

NeddySeagoon wrote:You virtual resolution is 1680x1050 - that the pixel buffer in the Video Ram.
If you can only see a part of that on the screen the window into the pixel buffer will scroll as you approach the edges of the display - does it?

Yes, but only when I include "Virtual 1680 1050" in my xorg.conf

NeddySeagoon wrote:
Code: Select all
emerge xvidtune
It will show how the display is operating. It should show you the numbers in your modeline.
Does it ?
If not, what does it say?

here's a screenshot: http://omploader.org/file/2007-03-12-17 ... _scrot.png

adekoba · Post by **adekoba** » Sat Apr 28, 2007 2:38 pm

Well, for anyone who wants to know, this problem was fixed with the latest xf86-video-i810 (2.0) release. 1680x1050 works perfectly.