I have an HP fairly new LCD Monitor. I connected it to a Windows laptop using a USB-C to HDMI adapter which went up literally in smoke. I connected a second adapter and it also died. I then got a different type of adapter that included several ports, not just an HDMI port, and that worked. The monitor now works fine with Windows at its native resolution of 1920x1080.
But now, the monitor when connected to a Raspberry Pi 4 running Ubuntu is set to 1024 x 768 rather than its native 1920 x 1080. I tried a factory reset on the monitor but to no avail. If I connect the Pi to an HDMI Dummy Plug device that acts like an HDMI monitor at 1920 x 1080, then the Pi will detect the 1920x1080 setting. I can then unplug this device and connect to the monitor and it works at 1920x1080, so it appears that the problem is that the monitor reports to the Pi that it is operating at 1024x768 even though it is capable of working at 1920x1080.
I also tried connecting it to a Pi5 running Pi OS Bookworm set to use Wayland. My little trick of using an HDMI Dummy Plug does not work so I assume the Pi is querying the monitor more often and not just when it is booted. It appears stuck at the lower resolution.
If I connect the monitor to a Windows computer, it works at the higher 1920 x 1080 setting.
Any idea how to get this resolved so that the Pi detects the valid 1920x1080 resolution?
But now, the monitor when connected to a Raspberry Pi 4 running Ubuntu is set to 1024 x 768 rather than its native 1920 x 1080. I tried a factory reset on the monitor but to no avail. If I connect the Pi to an HDMI Dummy Plug device that acts like an HDMI monitor at 1920 x 1080, then the Pi will detect the 1920x1080 setting. I can then unplug this device and connect to the monitor and it works at 1920x1080, so it appears that the problem is that the monitor reports to the Pi that it is operating at 1024x768 even though it is capable of working at 1920x1080.
I also tried connecting it to a Pi5 running Pi OS Bookworm set to use Wayland. My little trick of using an HDMI Dummy Plug does not work so I assume the Pi is querying the monitor more often and not just when it is booted. It appears stuck at the lower resolution.
If I connect the monitor to a Windows computer, it works at the higher 1920 x 1080 setting.
Any idea how to get this resolved so that the Pi detects the valid 1920x1080 resolution?
Statistics: Posted by hwdornbush — Fri Jan 10, 2025 3:56 am