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Roman_Gruber
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PostPosted: Tue Mar 08, 2016 9:14 pm    Post subject: exotic monitor, no specifications about resolutions Reply with quote

Hi

I got a hand on a second hand, out of the trash bin, lcd monitor.

For some reason I am unable to find any specifications about the supported resolutions.

I tried out a mobo lying around wiht a celeron D, which showed the inital bios screen, but turned in the Vsync overcapping screen when i tried to load an ubuntu disc, or a sysrescue disc.

The reason is obvious, as nvidia-settings on this laptop claims that the screen is a crt, and crts support much higher vsyncs as lcd.

next i plugged it in my laptop.

for a surprise it works.

My questions is:

Does anyone know the supported resolutions about this lcd-monitor?


Can I trust this section of the xorg log.

Quote:
[ 819.780] (II) NVIDIA(0): Setting mode "DPY-1:nvidia-auto-select+1024+0,DPY-0:1024x768_60+0+0"
[ 819.860] (--) NVIDIA(GPU-0): VHT PV1710 (CRT-0): connected
[ 819.860] (--) NVIDIA(GPU-0): VHT PV1710 (CRT-0): 400.0 MHz maximum pixel clock


because of the messages log

Quote:
Mar 8 21:34:11 ASUS-G75VW kernel: nvidia-modeset: WARNING: GPU:0: Unable to read EDID for display device VGA-0
Mar 8 21:34:11 ASUS-G75VW kernel: nvidia-modeset: WARNING: GPU:0: Unable to read EDID for display device VGA-0


Which means a broken edid of the screen. I exchanged the cable to test it, and it has the same behaviour. I do not have any more vga cables, only those two.

The label on the back says

VHTeck

Model MVS-17S

Sadly i could not find a manufacturer or any specification page.

I was a bit busy recently, I run a bit outdated kernel.

Code:
uname -a
Linux ASUS-G75VW 4.4.1-gentoo_12-02-2016 #1 SMP Fri Feb 12 14:46:28 CET 2016 x86_64 Intel(R) Core(TM) i7-3610QM CPU @ 2.30GHz GenuineIntel GNU/Linux


funny enough, it claims vga in, but has only vga port, but the plastics claims also dvi, but it lacks the dvi connector. i may open the montior and try to figure out how many parts are missing for dvi.

So there is no way to read out that edid from the montior right, because its vga, correct?

I may open the monitor and see which panel is inside, and from the panel i should hopefully can figure out which frequencies are supported. I hope the electronics and firmware were made in mind of hte panel to support everything the panel supports

--

and yes i could create a manual xorg-config but without proper specs, which i prefer first, it may be futile

--

edit

nope

Code:
get-edid
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Looks like no busses have an EDID. Sorry!
Attempting to use the classical VBE interface
Illegal instruction
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Buffoon
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PostPosted: Tue Mar 08, 2016 10:02 pm    Post subject: Reply with quote

I had a computer which was unable to pull EDID - with nvidia-drivers. Booted from liveCD and voila - EDID pulled with nouveau. My 2¢.
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krinn
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PostPosted: Tue Mar 08, 2016 10:37 pm    Post subject: Reply with quote

you might try the "aquire edid" trick i've use for mine. https://forums.gentoo.org/viewtopic-t-894978.html
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Ant P.
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PostPosted: Wed Mar 09, 2016 1:54 am    Post subject: Reply with quote

It's a normal "feature" of the proprietary nvidia blob for EDID to not work correctly.

You can define a correct modeline manually - man 1 cvt.
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Roman_Gruber
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PostPosted: Wed Mar 09, 2016 11:38 am    Post subject: Reply with quote

Thanks everyone for the input.

My issue is, I have no glue which resolution is hardware wise supported.

I could disassemble the monitor and hope i find a label on the lcd screen and google that up.

I used a ruler with inch and mm markings and checked wikipedia. It seems its a 17 Inch 5:4 ratio screen. I was not aware such sizes did exists in the past.

I could rely on the software but that may work or not...

I have a sysrescuecd on my shelf, not the last one, but I think that will not matter when it is a few months old.

Krinn thanks for the big summary topic. Very well documented.

As of now I am updating my kernel and my grub.cfg ... (will not improve anything in this regard but i had to do it anyway soon).

on a price comparision webpage in my area, I saw most of those 17 inch 5:4 ratio lcd screens these days supports something like 1280x ???? and not the very old 1024x768 or what its used now. that looks like a fall back resolution which any screen should work ....
The resolution, colours seems to be quite usueable and the lcd mount is also a bit adjustable, so I try to get the best resolution out of it and will use it.
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Roman_Gruber
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PostPosted: Wed Mar 09, 2016 12:32 pm    Post subject: Reply with quote

I just updated my gentoo sources and my nvidia drivers

Than rerun nvidia-settings and i get

http://postimg.org/image/dgplfbh35/

Maybe the updated kernel fixed it. A few minutes before I had booted up sysrescue cd and ubuntu livecd to test out my monitor. Maybe the bios has remembered the data or the updated gentoo sources and "reinstalled" nvidia-drviers solved it

Code:
sys-kernel/gentoo-sources-4.4.4
x11-drivers/nvidia-drivers-361.28-r2


output of sysrescuecd from october 2015

Code:
cat /boot/lcd_data
xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
LVDS-1 connected 1920x1080+0+0 (0x68) normal (normal left inverted right x axis y axis) 382mm x 215mm
   Identifier: 0x63
   Timestamp:  92912
   Subpixel:   unknown
   Gamma:      1.0:1.0:1.0
   Brightness: 1.0
   Clones:   
   CRTC:       0
   CRTCs:      0 1 2 3
   Transform:  1.000000 0.000000 0.000000
               0.000000 1.000000 0.000000
               0.000000 0.000000 1.000000
              filter:
   EDID:
      00ffffffffffff000daf201700000000
      021501049026157802ed95a3544c9c26
      0f505400000001010101010101010101
      010101010101e13680ae703826403423
      36007ed71000001a1d2480a070381f40
      302035007ed71000001a000000fe0048
      4339474b803137334847450a00000000
      000041319e0000000002010a202000f3
   dithering depth: auto
      supported: auto, 6 bpc, 8 bpc
   dithering mode: auto
      supported: auto, off, static 2x2, dynamic 2x2, temporal
   scaling mode: Full
      supported: None, Full, Center, Full aspect
   color vibrance: 150
      range: (0, 200)
   vibrant hue: 90
      range: (0, 180)
  1920x1080 (0x68) 140.490MHz +HSync -VSync *current +preferred
        h: width  1920 start 1972 end 2007 total 2094 skew    0 clock  67.09KHz
        v: height 1080 start 1083 end 1089 total 1118           clock  60.01Hz
  1920x1080 (0x69) 173.000MHz -HSync +VSync
        h: width  1920 start 2048 end 2248 total 2576 skew    0 clock  67.16KHz
        v: height 1080 start 1083 end 1088 total 1120           clock  59.96Hz
  1920x1080 (0x6a) 92.450MHz +HSync -VSync
        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock  44.45KHz
        v: height 1080 start 1083 end 1088 total 1111           clock  40.01Hz
  1680x1050 (0x6b) 146.250MHz -HSync +VSync
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz
        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz
  1400x1050 (0x6c) 121.750MHz -HSync +VSync
        h: width  1400 start 1488 end 1632 total 1864 skew    0 clock  65.32KHz
        v: height 1050 start 1053 end 1057 total 1089           clock  59.98Hz
  1280x1024 (0x6d) 109.000MHz -HSync +VSync
        h: width  1280 start 1368 end 1496 total 1712 skew    0 clock  63.67KHz
        v: height 1024 start 1027 end 1034 total 1063           clock  59.89Hz
  1280x960 (0x6e) 101.250MHz -HSync +VSync
        h: width  1280 start 1360 end 1488 total 1696 skew    0 clock  59.70KHz
        v: height  960 start  963 end  967 total  996           clock  59.94Hz
  1152x864 (0x6f) 81.750MHz -HSync +VSync
        h: width  1152 start 1216 end 1336 total 1520 skew    0 clock  53.78KHz
        v: height  864 start  867 end  871 total  897           clock  59.96Hz
  1024x768 (0x70) 63.500MHz -HSync +VSync
        h: width  1024 start 1072 end 1176 total 1328 skew    0 clock  47.82KHz
        v: height  768 start  771 end  775 total  798           clock  59.92Hz
  800x600 (0x71) 38.250MHz -HSync +VSync
        h: width   800 start  832 end  912 total 1024 skew    0 clock  37.35KHz
        v: height  600 start  603 end  607 total  624           clock  59.86Hz
  640x480 (0x72) 23.750MHz -HSync +VSync
        h: width   640 start  664 end  720 total  800 skew    0 clock  29.69KHz
        v: height  480 start  483 end  487 total  500           clock  59.38Hz
  720x400 (0x73) 22.250MHz -HSync +VSync
        h: width   720 start  744 end  808 total  896 skew    0 clock  24.83KHz
        v: height  400 start  403 end  413 total  417           clock  59.55Hz
  640x400 (0x74) 20.000MHz -HSync +VSync
        h: width   640 start  664 end  720 total  800 skew    0 clock  25.00KHz
        v: height  400 start  403 end  409 total  417           clock  59.95Hz
  640x350 (0x75) 17.500MHz -HSync +VSync
        h: width   640 start  664 end  720 total  800 skew    0 clock  21.88KHz
        v: height  350 start  353 end  363 total  366           clock  59.77Hz
VGA-1 connected (normal left inverted right x axis y axis)
   Identifier: 0x64
   Timestamp:  92912
   Subpixel:   unknown
   Clones:   
   CRTCs:      0 1 2 3
   Transform:  1.000000 0.000000 0.000000
               0.000000 1.000000 0.000000
               0.000000 0.000000 1.000000
              filter:
   EDID:
      00ffffffffffff005914dddd01000000
      040d010318221bb9ea9119a255499827
      10484cbfef003140314a454a614c8180
      818a818c8140ea240060410028303060
      130036e61000001e000000ff00303233
      3530303030303030310a000000fd0032
      4b1e520e000a202020202020000000fc
      0050563137313020202020202020007f
   scaling mode: None
      supported: None, Full, Center, Full aspect
   color vibrance: 150
      range: (0, 200)
   vibrant hue: 90
      range: (0, 180)
  1024x768 (0x91) 94.500MHz +HSync +VSync +preferred
        h: width  1024 start 1072 end 1168 total 1376 skew    0 clock  68.68KHz
        v: height  768 start  769 end  772 total  808           clock  85.00Hz
  1280x1024 (0x92) 135.000MHz +HSync +VSync
        h: width  1280 start 1296 end 1440 total 1688 skew    0 clock  79.98KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  75.02Hz
  1280x1024 (0x93) 132.840MHz -HSync +VSync
        h: width  1280 start 1368 end 1504 total 1728 skew    0 clock  76.88KHz
        v: height 1024 start 1025 end 1028 total 1067           clock  72.05Hz
  1280x1024 (0x94) 128.946MHz -HSync +VSync
        h: width  1280 start 1368 end 1504 total 1728 skew    0 clock  74.62KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  70.00Hz
  1280x1024 (0x95) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz
  1280x960 (0x96) 108.000MHz +HSync +VSync
        h: width  1280 start 1376 end 1488 total 1800 skew    0 clock  60.00KHz
        v: height  960 start  961 end  964 total 1000           clock  60.00Hz
  1024x768 (0x97) 78.800MHz +HSync +VSync
        h: width  1024 start 1040 end 1136 total 1312 skew    0 clock  60.06KHz
        v: height  768 start  769 end  772 total  800           clock  75.08Hz
  1024x768 (0x98) 78.438MHz -HSync +VSync
        h: width  1024 start 1080 end 1192 total 1360 skew    0 clock  57.67KHz
        v: height  768 start  769 end  772 total  801           clock  72.00Hz
  1024x768 (0x99) 75.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1328 skew    0 clock  56.48KHz
        v: height  768 start  771 end  777 total  806           clock  70.07Hz
  1024x768 (0x9a) 65.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz
        v: height  768 start  771 end  777 total  806           clock  60.00Hz
  832x624 (0x9b) 57.284MHz -HSync -VSync
        h: width   832 start  864 end  928 total 1152 skew    0 clock  49.73KHz
        v: height  624 start  625 end  628 total  667           clock  74.55Hz
  800x600 (0x9c) 50.000MHz +HSync +VSync
        h: width   800 start  856 end  976 total 1040 skew    0 clock  48.08KHz
        v: height  600 start  637 end  643 total  666           clock  72.19Hz
  800x600 (0x9d) 49.500MHz +HSync +VSync
        h: width   800 start  816 end  896 total 1056 skew    0 clock  46.88KHz
        v: height  600 start  601 end  604 total  625           clock  75.00Hz
  800x600 (0x9e) 45.504MHz -HSync +VSync
        h: width   800 start  840 end  920 total 1040 skew    0 clock  43.75KHz
        v: height  600 start  601 end  604 total  625           clock  70.01Hz
  800x600 (0x9f) 40.000MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz
        v: height  600 start  601 end  605 total  628           clock  60.32Hz
  800x600 (0xa0) 36.000MHz +HSync +VSync
        h: width   800 start  824 end  896 total 1024 skew    0 clock  35.16KHz
        v: height  600 start  601 end  603 total  625           clock  56.25Hz
  640x480 (0xa1) 31.500MHz -HSync -VSync
        h: width   640 start  656 end  720 total  840 skew    0 clock  37.50KHz
        v: height  480 start  481 end  484 total  500           clock  75.00Hz
  640x480 (0xa2) 31.500MHz -HSync -VSync
        h: width   640 start  664 end  704 total  832 skew    0 clock  37.86KHz
        v: height  480 start  489 end  491 total  520           clock  72.81Hz
  640x480 (0xa3) 30.240MHz -HSync -VSync
        h: width   640 start  704 end  768 total  864 skew    0 clock  35.00KHz
        v: height  480 start  483 end  486 total  525           clock  66.67Hz
  640x480 (0xa4) 28.574MHz -HSync +VSync
        h: width   640 start  664 end  728 total  816 skew    0 clock  35.02KHz
        v: height  480 start  481 end  484 total  500           clock  70.03Hz
  640x480 (0xa5) 25.200MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.50KHz
        v: height  480 start  490 end  492 total  525           clock  60.00Hz
  640x480 (0xa6) 25.175MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  489 end  492 total  525           clock  59.94Hz
  720x400 (0xa7) 28.320MHz -HSync +VSync
        h: width   720 start  738 end  846 total  900 skew    0 clock  31.47KHz
        v: height  400 start  412 end  414 total  449           clock  70.08Hz
HDMI-1 disconnected (normal left inverted right x axis y axis)
   Identifier: 0x65
   Timestamp:  92912
   Subpixel:   unknown
   Clones:   
   CRTCs:      0 1 2 3
   Transform:  1.000000 0.000000 0.000000
               0.000000 1.000000 0.000000
               0.000000 0.000000 1.000000
              filter:
   dithering depth: auto
      supported: auto, 6 bpc, 8 bpc
   dithering mode: auto
      supported: auto, off, static 2x2, dynamic 2x2, temporal
   scaling mode: Full
      supported: None, Full, Center, Full aspect
   color vibrance: 150
      range: (0, 200)
   vibrant hue: 90
      range: (0, 180)
   underscan vborder: 0
      range: (0, 128)
   underscan hborder: 0
      range: (0, 128)
   underscan: off
      supported: auto, off, on
DP-1 disconnected (normal left inverted right x axis y axis)
   Identifier: 0x66
   Timestamp:  92912
   Subpixel:   unknown
   Clones:   
   CRTCs:      0 1 2 3
   Transform:  1.000000 0.000000 0.000000
               0.000000 1.000000 0.000000
               0.000000 0.000000 1.000000
              filter:
   dithering depth: auto
      supported: auto, 6 bpc, 8 bpc
   dithering mode: auto
      supported: auto, off, static 2x2, dynamic 2x2, temporal
   scaling mode: Full
      supported: None, Full, Center, Full aspect
   color vibrance: 150
      range: (0, 200)
   vibrant hue: 90
      range: (0, 180)
   underscan vborder: 0
      range: (0, 128)
   underscan hborder: 0
      range: (0, 128)
   underscan: off
      supported: auto, off, on



output of ubuntu livecd, installer dvd, from october 2015

it uses systemd and nouveau

Code:
cat /boot/ubuntu_xrandr
xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
LVDS-1 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 382mm x 215mm
   1920x1080      60.0 +   60.0     40.0 
   1680x1050      60.0 
   1400x1050      60.0 
   1280x1024      59.9*
   1280x960       59.9 
   1152x864       60.0 
   1024x768       59.9 
   800x600        59.9 
   640x480        59.4 
   720x400        59.6 
   640x400        60.0 
   640x350        59.8 
VGA-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 310mm x 230mm
   1024x768       85.0 +   75.1     72.0     70.1     60.0 
   1280x1024      75.0*    72.0     70.0     60.0 
   1280x960       60.0 
   832x624        74.6 
   800x600        72.2     75.0     70.0     60.3     56.2 
   640x480        75.0     72.8     66.7     70.0     60.0     59.9 
   720x400        70.1 
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)



No idea if it was an older kernel.

when i move my mouse over the screen picture of nivdia-settings it claims

1280x1024 @75 Hz

I saw this resolution on a price comparision site for similar devices. I think these values are correct

relevant section of splat nvidia-drivers. So it was the update of gentoo-sources probably which fixed it
Code:
 * x11-drivers/nvidia-drivers-361.28-r2

   Emerged at: Fr Feb 19 20:58:40 2016
   Build time: 1 minute, and 48 seconds

   Emerged at: Mi M�r  9 13:19:07 2016
   Build time: 2 minutes, and 16 seconds


I will see in the next few days / weeks if it works flawless and than close this topic.
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Roman_Gruber
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PostPosted: Wed Mar 09, 2016 12:42 pm    Post subject: Reply with quote

Code:
xrandr
Screen 0: minimum 8 x 8, current 3200 x 1080, maximum 16384 x 16384
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 340mm x 270mm
   1024x768      85.00 +  75.03    72.00    70.07    60.00 
   1280x1024     75.02*   72.00    70.00    60.02 
   1280x960      60.00 
   800x600       75.00    72.19    70.00    60.32    56.25 
   640x480       75.00    72.81    70.00    59.95    59.94 
LVDS-0 connected primary 1920x1080+1280+0 (normal left inverted right x axis y axis) 382mm x 215mm
   1920x1080     60.01*+  40.01 
DP-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
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