[UPDATE 12 Oct: I have determined that it is not related to the laptop/GeForce hardware. The issue is related to nouveau/nvidia drivers. I get the same behavior described below on both the GeChic panel and an ASUS LCD monitor. Both or on HDMI. For behavior jump down to the updated portion. ]
I have a GeChic 1503H external HDMI monitor which works correctly from Windows 10. However, if I use xrandr, the monitor seems to be configure with the incorrect refresh rate - maybe it's something else?? This is a linux installation with 5.2.0 kernel, using the kernel's nouveau driver.
The device is found by xrandr:
> HDMI-1-3 connected (normal left inverted right x axis y axis) > 1920x1080 60.00 + 59.96 50.00 59.94 59.93 > 1920x1080i 69.09 60.00 50.00 59.94 1680x1050 > 59.95 59.88 1440x1080 59.99 1400x1050 59.98
However after executing:
xrandr --output eDP1 --primary --auto --output HDMI-1-3 --auto
xrandr --output eDP1 --primary --auto --output HDMI-1-3 --mode 1920x1080 --rate 60.00
The screen is activated, and appears to be a mirror of the main eDP1 screen as I can see the blurry cursor image moving. Here is a picture of the resulting screen:
EDID information per request:
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 Performing real mode VBE call Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0 Function unsupported Call failed VBE version 0 VBE string at 0x0 "Partial Read... Try again
If anyone can suggest something to try I'd be glad to do so.
27 Oct, Some additional tests/info.
Blacklisting nouveau, after installing NVIDIA's 430.50 and rebooting the primary display starts, however once the video driver is loaded, the primary eDSP1 laptop display blanks out, and the GeChic panel turns on. This made realize that I thought my external ASUS 24" panel was dead ... however when I connect it to the laptop with NVIDIA's driver (rather than nouveau as I had always been doing) the panel works fine. But, also, eDSP1 is blank on the laptop.
xrandr with NVIDIA's driver:
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767 HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y >axis) 293mm x 1 65mm 1920x1080 60.00*+ 59.94 50.00
DP-0 disconnected (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis)
sudo get-edid | parse-edid