On 18/07/2023 12:00, Peter Hillier-Brook wrote:
On 17/07/2023 20:29, riveravaldez wrote:On 7/17/23, Peter Hillier-Brook <phb@hbsys.plus.com> wrote:I recently upgraded 2 laptops from Bullseye to Bookworm and no longer have access to my external monitor from one of them. My environment consists of a couple of laptops connected to an external monitor via an HDMI Switch that, until the upgrades, gave excellent service. The only diagnostic I have is that, from the failing m/c, the monitor reports that there is no HDMI signal from that computer. Any thoughts will be welcomed.Hi, just in case: what's the output of: $ xrandr , with everything turned on and connected?Interesting thought, but no answer. The only output is the internal monitor and a disconnected VGA port. HDMI is missing in action.As it was working until the reboot into Bookworm, I think the possibility of a hardware failure at that precise instant is somewhat remote, but...My next step is to find a Live, pre-Bookworm CD and see what happens. The reason I posted here was to establish if anyone else has encountered this issue and found a solution.
It seems that it must be a hardware failure. A Bullseye live system exhibits the same missing HDMI signal and swapping the HDMI cables eliminated that as a possibility.
Over and out. Peter HB