Problem with HDMI output using KVM switch

userHead k3dAR 2020-01-27 05:19:19 7876 Views5 Replies
i have LatePanda V1.2 2GB/32GB with Xubuntu 18.04.3 64bit and KVM Aten CS629

after KVM switch to second PC, and back, LattePanda not show video on HDMI output, KVM have "keep video active" mode when switched to other,
but LattePanda switch HDMI output OFF (as i see in xrandr output) while is not active, and not switch back to ON while KVM set back to LattePanda...

workaround is (not always work) to switch using keyboard to virtual console using CTRL+ALT+F1 and back to Desktop using CTRL+ALT+F7,
but problem is not about Xubuntu (or GNU/Linux) General, because while LattePanda is OFF and connected to KVM and switch as active, then after PowerOn LattePanda is bios not initializad, wait 5minutes, then connect from LCD Monitor HDMI cable direct (without KVM) and LattePanda show Logo and start initializing and boot system, then is wait to connected HDMI monitor...

i try many change in BIOS about GPU and PowerSave, reset to default, but nothing help...