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I have a dual-monitor setup, running on a NVIDIA GTX 970 graphics card using the proprietary driver. The second monitor is only allowing me to set the resolution to 800x600, however it should support 1920x1080. I just removed Windows and installed Arch, but before while using Windows both monitors were correctly set to 1920x1080. I did some searching online, but it seemed as though most of the answers were that there was a bad cable. However, since this exact setup works fine in Windows, the cable should not be the issue.
Looking at the logs, the error that stands out is:
[ 120.965] (WW) NVIDIA(GPU-0): The EDID read for display device DFP-4 is invalid:
[ 120.965] (WW) NVIDIA(GPU-0): - The EDID has a bad checksum. The "IgnoreEDIDChecksum" X
[ 120.965] (WW) NVIDIA(GPU-0): configuration option may be used to attempt using mode
[ 120.965] (WW) NVIDIA(GPU-0): timings in this EDID in spite of this error. A corrupt
[ 120.965] (WW) NVIDIA(GPU-0): EDID may have mode timings beyond the capabilities of your
[ 120.965] (WW) NVIDIA(GPU-0): display, and could damage your hardware. Please use with
[ 120.965] (WW) NVIDIA(GPU-0): care.
Is there any way to fix this issue, besides using the recommended "IgnoreEDIDChecksum" configuration? Setting that option does fix the issue, but the warning about damaging the hardware worries me. Thanks for any help!
Here is a paste of the Xorg log: http://pastie.org/private/f5wmxbsjc47mxjdqlxlsuw
Here is my Xorg.conf:
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 346.59 (buildmeister@swio-display-x86-rhel47-04) Tue Mar 31 14:42:07 PDT 2015
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
EndSubSection
EndSection
Last edited by nicksmaddog (2015-04-21 03:36:54)
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Looks like your monitor is not feeding back the correct EDID.
Try following this guide to add a setting manually:
https://wiki.archlinux.org/index.php/Xr … esolutions
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Thanks for the reply. I tried following those commands, with the following result:
➜ ~ cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
➜ ~ sudo xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
➜ ~ sudo xrandr --addmode DVI-D-0 1920x1080_60.00
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 43
Current serial number in output stream: 44
Also, this is the output when running xrandr if it provides any additional information:
➜ ~ xrandr
Screen 0: minimum 8 x 8, current 2720 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 287mm
1920x1080 60.00*+
1680x1050 59.95
1440x900 59.89
1280x1024 60.02
1280x800 59.81
1152x864 75.00
1024x768 70.07 60.00
800x600 60.32 56.25
640x480 59.94
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 800x600+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm
800x600 60.32*+
Unknown-0 disconnected (normal left inverted right x axis y axis)
1920x1080_60.00 (0x1ea) 173.000MHz
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
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