I have an external monitor connected through HDMI with a 3440x1440 max resolution, but I’m getting 1600x900 top.
Interestingly enough, the monitor works as expected on Windows 10.
When I check the EDID value of my monitor with get-edid -b 10 | parse-edid, I get the following:
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Only trying 10 as per your request.
256-byte EDID successfully retrieved from i2c bus 10
Looks like i2c was successful. Have a good day.
Checksum Correct
Section "Monitor"
Identifier "MSI MAG341CQ"
ModelName "MSI MAG341CQ"
VendorName "MSI"
# Monitor Manufactured week 44 of 2018
# EDID version 1.3
# Digital Display
DisplaySize 800 330
Gamma 2.20
Option "DPMS" "true"
Horizsync 222-222
VertRefresh 48-100
# Maximum pixel clock is 10MHz
#Not giving standard mode: 1024x768, 60Hz
#Not giving standard mode: 1280x1024, 60Hz
#Not giving standard mode: 1440x810, 60Hz
#Not giving standard mode: 1680x1260, 60Hz
#Not giving standard mode: 1280x1024, 100Hz
#Not giving standard mode: 1920x1080, 100Hz
#Not giving standard mode: 1680x1050, 100Hz
#Not giving standard mode: 1920x1080, 60Hz
#Extension block found. Parsing...
Extension block checksum failed
Having this portion of xrandr output:
xrandr
Screen 0: minimum 8 x 8, current 3520 x 1080, maximum 32767 x 32767
HDMI-0 connected 1600x900+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.00 +
1600x900 59.82*
1400x900 59.88
1368x768 59.88 59.85
1360x768 59.96 59.80
1280x800 59.91 59.81
1280x720 59.86 59.74
1152x864 60.00
1024x576 59.90 59.82
960x540 59.82 59.63
864x486 59.92 59.57
800x600 72.19 60.32 56.25
800x450 59.82
700x450 59.88
684x384 59.88 59.85
680x384 59.96 59.80
640x480 59.94
640x400 59.98 59.88
640x360 59.86 59.83
512x384 60.00
512x288 60.00 59.92
480x270 59.82 59.63
432x243 59.92 59.57
400x300 72.19
. . .
Trying the following:
~ # cvt 3440 1440 60
# 3440x1440 59.94 Hz (CVT) hsync: 89.48 kHz; pclk: 419.50 MHz
Modeline "3440x1440_60.00" 419.50 3440 3696 4064 4688 1440 1443 1453 1493 -hsync +vsync
~ # xrandr --newmode "3440x1440_60.00" 419.50 3440 3696 4064 4688 1440 1443 1453 1493 -hsync +vsync
~ # xrandr --addmode "HDMI-0" "3440x1440_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: 50
Current serial number in output stream: 51
I tried creating a new mode on /usr/share/X11/xorg.conf.d/10-monitor.conf with the following content:
Section "Monitor"
Identifier "Monitor0"
Modeline "3440x1440_60.00" 419.11 3440 3688 4064 4688 1440 1441 1444 1490 -HSync +Vsync
EndSection
Section "Screen"
Identifier "Screen0"
Device "HDMI-0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "3440x1440_60.00"
EndSubSection
EndSection
… but it doesn’t work. Checking /var/log/Xorg.0.log, I get the following:
[ 20.677] (--) NVIDIA(GPU-0): DFP-0: connected
[ 20.677] (--) NVIDIA(GPU-0): DFP-0: Internal TMDS
[ 20.677] (--) NVIDIA(GPU-0): DFP-0: 165.0 MHz maximum pixel clock
[ 20.677] (--) NVIDIA(GPU-0):
[ 20.682] (WW) NVIDIA(0): No valid modes for "DFP-0:3440x1440_60.00"; removing.
[ 20.682] (WW) NVIDIA(0):
[ 20.682] (WW) NVIDIA(0): Unable to validate any modes; falling back to the default mode
[ 20.682] (WW) NVIDIA(0): "nvidia-auto-select".
[ 20.682] (WW) NVIDIA(0):
[ 20.682] (II) NVIDIA(0): Validated MetaModes:
[ 20.682] (II) NVIDIA(0): "DFP-0:nvidia-auto-select"
[ 20.682] (II) NVIDIA(0): Virtual screen size determined to be 1024 x 768
[ 20.689] (WW) NVIDIA(0): DFP-0 does not have an EDID, or its EDID does not contain a
[ 20.689] (WW) NVIDIA(0): maximum image size; cannot compute DPI from DFP-0's EDID.
Details:
- Ubuntu 18.04.4 LTS
- GeForce GTX 1050 Ti
- Nvidia driver version: 450.57