The monitor was saying no HDMI signal. But all was well with LM20.3.
The monitor is a fairly new ASUS Pro Art PA279CV and the monitor only has HDMI and Display Port connectors.
However, I built this computer in 2009 and the old NVIDIA GTX-275 card only has DVI and VGA.
So for about a year, I've had the monitor connected using a DVI to HDMI adapter.
I have an old small Dell monitor that uses DVI and when I connected it, the video worked just fine with the LM21 upgrade.
When I Timeshifted out the upgrade and went back to LM20.3, my Pro Art monitor "saw" the HDMI signal and worked again.
It seems to me the adapter or the connection cannot be bad if it works with 20.3, doesn't work with 21, but then works again when 20.3 is restored.
What could possibly be in LM21 that keeps my monitor from even "seeing" the HDMI signal, but yet it does "see" it with 20.3.
There are no other drivers available on the drivers page.
Does anyone have any idea what is happening?
Thank you.
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System: Kernel: 5.4.0-122-generic x86_64 bits: 64 compiler: gcc v: 9.4.0 Desktop: Cinnamon 5.2.7 wm: muffin 5.2.1
dm: LightDM 1.30.0 Distro: Linux Mint 20.3 Una base: Ubuntu 20.04 focal
Machine: Type: Desktop Mobo: EVGA model: 132-BL-E758 v: Tylersburg serial: <filter> BIOS: Phoenix v: 6.00 PG
date: 04/20/2011
CPU: Topology: Quad Core model: Intel Core i7 920 bits: 64 type: MT MCP arch: Nehalem rev: 5
L2 cache: 8192 KiB
flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 42451
Speed: 1697 MHz min/max: 1596/2661 MHz boost: enabled Core speeds (MHz): 1: 1781 2: 1809 3: 1875 4: 1758
5: 1879 6: 1811 7: 1888 8: 1863
Graphics: Device-1: NVIDIA GT200b [GeForce GTX 275] vendor: eVga.com. driver: nvidia v: 340.108 bus ID: 02:00.0
chip ID: 10de:05e6
Display: x11 server: X.Org 1.20.13 driver: nvidia unloaded: fbdev,modesetting,nouveau,vesa
resolution: 1920x1080~60Hz
OpenGL: renderer: GeForce GTX 275/PCIe/SSE2 v: 3.3.0 NVIDIA 340.108 direct render: Yes
