I just got a new monitor for my desktop system (the old one died after *many* years of service). The new monitor is a high res 16:9 monitor, but the VESA video driver insists on using 1024x768 (which was the resolution of the *old* monitor). It does seem to detect higher, 16:9 resolutions but it is not using them. I *think* I need to set some low-level video mode thing, but it has been a long time since I have had to do that that I have totally forgotten how to do it. And I have been unable to find it with a websearch either.
From /var/log/Xorg.0.log:
(II) VESA(0): Printing DDC gathered Modelines: (II) VESA(0): Modeline "1366x768"x0.0 85.50 1366 1436 1579 1792 768 771 774 798 +hsync +vsync (47.7 kHz) (II) VESA(0): Modeline "1360x768"x0.0 85.50 1360 1424 1536 1792 768 771 777 795 +hsync +vsync (47.7 kHz) (II) VESA(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz) (II) VESA(0): Modeline "800x600"x0.0 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz) (II) VESA(0): Modeline "640x480"x0.0 31.50 640 656 720 840 480 481 484 500 -hsync -vsync (37.5 kHz) (II) VESA(0): Modeline "640x480"x0.0 31.50 640 664 704 832 480 489 492 520 -hsync -vsync (37.9 kHz) (II) VESA(0): Modeline "640x480"x0.0 30.24 640 704 768 864 480 483 486 525 -hsync -vsync (35.0 kHz) (II) VESA(0): Modeline "640x480"x0.0 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz) (II) VESA(0): Modeline "720x400"x0.0 28.32 720 738 846 900 400 412 414 449 -hsync +vsync (31.5 kHz) (II) VESA(0): Modeline "1024x768"x0.0 78.75 1024 1040 1136 1312 768 769 772 800 +hsync +vsync (60.0 kHz) (II) VESA(0): Modeline "1024x768"x0.0 75.00 1024 1048 1184 1328 768 771 777 806 -hsync -vsync (56.5 kHz) (II) VESA(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz) (II) VESA(0): Modeline "832x624"x0.0 57.28 832 864 928 1152 624 625 628 667 -hsync -vsync (49.7 kHz) (II) VESA(0): Modeline "800x600"x0.0 49.50 800 816 896 1056 600 601 604 625 +hsync +vsync (46.9 kHz) (II) VESA(0): Modeline "800x600"x0.0 50.00 800 856 976 1040 600 637 643 666 +hsync +vsync (48.1 kHz) (II) VESA(0): Modeline "1280x720"x60.0 74.48 1280 1336 1472 1664 720 721 724 746 -hsync +vsync (44.8 kHz) (II) VESA(0): Searching for matching VESA mode(s):
Any of 1360x768, 1366x768, or 1280x720 would be fine.
Following this are a pile of blocks starting with 'Mode: ...' or '*Mode: ...'. I think these are the modes the driver is reading from some 'magic' place and maybe the stared ones are 'matches' to the DCC mode lines. I think what I need to do is update this 'magic' place with a low-level program (probably eventually run in /etc/rc.local or someplace like that) that will add in a 'Mode' -- I did this *years* ago with little machines with Intel video chips and 16:9 monitors. But I am totally blanking on the command to use. I find using a 4:3 video mode on a 16:9 monitor somewhat unusable.
I running CentOS 5.11 w/Xen. The video chipset is a NVIDIA Corporation C77 [GeForce 8200] (rev a2). I am using stock CentOS 5 drivers and libraries (slightly out of date).
On Tue, Dec 01, 2015 at 03:47:13PM -0500, Robert Heller wrote:
I just got a new monitor for my desktop system (the old one died after *many* years of service). The new monitor is a high res 16:9 monitor, but the VESA video driver insists on using 1024x768 (which was the resolution of the *old* monitor). It does seem to detect higher, 16:9 resolutions but it is not using them. I *think* I need to set some low-level video mode thing, but it has been a long time since I have had to do that that I have totally forgotten how to do it. And I have been unable to find it with a websearch either.
Robert:
A few years back I had a similar problem when switching from an OLD monitor to a new one.
I found the problem to be that I was still attempting to use the OLD VGA cable which apparently did not have the wires in it to pass the monitor capabilities back to the video card. As soon as I switched to the cable that came with the new one the system properly detected the new monitor and all was well.
Fred
From /var/log/Xorg.0.log:
(II) VESA(0): Printing DDC gathered Modelines: (II) VESA(0): Modeline "1366x768"x0.0 85.50 1366 1436 1579 1792 768 771 774 798 +hsync +vsync (47.7 kHz) (II) VESA(0): Modeline "1360x768"x0.0 85.50 1360 1424 1536 1792 768 771 777 795 +hsync +vsync (47.7 kHz) (II) VESA(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz) (II) VESA(0): Modeline "800x600"x0.0 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz) (II) VESA(0): Modeline "640x480"x0.0 31.50 640 656 720 840 480 481 484 500 -hsync -vsync (37.5 kHz) (II) VESA(0): Modeline "640x480"x0.0 31.50 640 664 704 832 480 489 492 520 -hsync -vsync (37.9 kHz) (II) VESA(0): Modeline "640x480"x0.0 30.24 640 704 768 864 480 483 486 525 -hsync -vsync (35.0 kHz) (II) VESA(0): Modeline "640x480"x0.0 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz) (II) VESA(0): Modeline "720x400"x0.0 28.32 720 738 846 900 400 412 414 449 -hsync +vsync (31.5 kHz) (II) VESA(0): Modeline "1024x768"x0.0 78.75 1024 1040 1136 1312 768 769 772 800 +hsync +vsync (60.0 kHz) (II) VESA(0): Modeline "1024x768"x0.0 75.00 1024 1048 1184 1328 768 771 777 806 -hsync -vsync (56.5 kHz) (II) VESA(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz) (II) VESA(0): Modeline "832x624"x0.0 57.28 832 864 928 1152 624 625 628 667 -hsync -vsync (49.7 kHz) (II) VESA(0): Modeline "800x600"x0.0 49.50 800 816 896 1056 600 601 604 625 +hsync +vsync (46.9 kHz) (II) VESA(0): Modeline "800x600"x0.0 50.00 800 856 976 1040 600 637 643 666 +hsync +vsync (48.1 kHz) (II) VESA(0): Modeline "1280x720"x60.0 74.48 1280 1336 1472 1664 720 721 724 746 -hsync +vsync (44.8 kHz) (II) VESA(0): Searching for matching VESA mode(s):
Any of 1360x768, 1366x768, or 1280x720 would be fine.
Following this are a pile of blocks starting with 'Mode: ...' or '*Mode: ...'. I think these are the modes the driver is reading from some 'magic' place and maybe the stared ones are 'matches' to the DCC mode lines. I think what I need to do is update this 'magic' place with a low-level program (probably eventually run in /etc/rc.local or someplace like that) that will add in a 'Mode' -- I did this *years* ago with little machines with Intel video chips and 16:9 monitors. But I am totally blanking on the command to use. I find using a 4:3 video mode on a 16:9 monitor somewhat unusable.
I running CentOS 5.11 w/Xen. The video chipset is a NVIDIA Corporation C77 [GeForce 8200] (rev a2). I am using stock CentOS 5 drivers and libraries (slightly out of date).
-- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services heller@deepsoft.com -- Webhosting Services
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Robert Heller wrote:
I just got a new monitor for my desktop system (the old one died after *many* years of service). The new monitor is a high res 16:9 monitor, but the VESA video driver insists on using 1024x768 (which was the resolution of the *old* monitor). It does seem to detect higher, 16:9 resolutions but it is not using them. I *think* I need to set some low-level video mode thing, but it has been a long time since I have had to do that that I have totally forgotten how to do it. And I have been unable to find it with a websearch either.
<snip> #1: your /etc/X11/xorg.conf is probably set for the old monitor. As you don't mention what your video card is, I can't advise you use something like nfidia-config, so either edit that file, or move it aside, and see what you get.
mark
On 12/1/2015 12:47 PM, Robert Heller wrote:
I just got a new monitor for my desktop system (the old one died after*many* years of service). The new monitor is a high res 16:9 monitor, but the VESA video driver insists on using 1024x768 (which was the resolution of the*old* monitor). It does seem to detect higher, 16:9 resolutions but it is not using them. I*think* I need to set some low-level video mode thing, but it has been a long time since I have had to do that that I have totally forgotten how to do it. And I have been unable to find it with a websearch either.
I've never had much luck connecting HD 16:9 aspect 1920x1080 (or 16:10 1920x1200) monitors to VGA outputs, even on MS Windows systems. they work much much better on DVI or HDMI or DisplayPort.
On Tue, December 1, 2015 3:50 pm, John R Pierce wrote:
On 12/1/2015 12:47 PM, Robert Heller wrote:
I just got a new monitor for my desktop system (the old one died after*many* years of service). The new monitor is a high res 16:9 monitor, but the VESA video driver insists on using 1024x768 (which was the resolution of the*old* monitor). It does seem to detect higher, 16:9 resolutions but it is not using them. I*think* I need to set some low-level video mode thing, but it has been a long time since I have had to do that that I have totally forgotten how to do it. And I have been unable to find it with a websearch either.
I've never had much luck connecting HD 16:9 aspect 1920x1080 (or 16:10 1920x1200) monitors to VGA outputs, even on MS Windows systems. they work much much better on DVI or HDMI or DisplayPort.
I did, and they worked. But I 100% agree, they will work better on DVI or HDMI or DisplayPort.
Valeri
-- john r pierce, recycling bits in santa cruz
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++
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