Date: Wed, 26 Nov 2025 22:31:20 +0100 From: Lars Tunkrans <drsnx60@gmail.com> To: FreeBSD User <freebsd@walstatt-de.de>, freebsd-x11@freebsd.org, freebsd-current@freebsd.org Subject: Re: FreeBSD/X11: Howto revive DisplayPort? Message-ID: <77c2a2fb-ac5f-4b4a-98c6-660a39ee87b2@gmail.com> In-Reply-To: <20251126163059.3376d3e8@hermann>
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HI Yes I have same experience. I beleive its because the DDC/ EDID info sent from screen over the connection cable is lost if the KVM and screen is not connected to the computer at start up. If I make sure that the screen is attached to the computer when the computer powers up a Usable resoultion/timing is selected by the graphics card. Regards. Den 2025-11-26 kl. 16:37, skrev FreeBSD User: > Using FreeBSD CURREN and FreeBSD STABLE/15. > Also, most systems are attached to a KVM switch, connected via DP. > > Hosts booting all UEFI. > > On hosts using X11/xdm GUI, switching forth and back to the output/host I want to use > DP does obviously not "lose" DP output, so after graphics has been initialized I'm able > to see the GUI. > > The situation is completely different with plain consoles, provided by FreeBSD's EFI/UEFI > simple framebuffer device driver. Working on the console on one host, switching to > another host, working there and trying to switch back leaves me with no output anymore! I > see this behaviour with different types of KVM switches I have at hand. > > Can this behaviour be changed, even with no X11? > > Thanks in advance and wishes, > > O. Hartmann > -- ------------------------- Lars Tunkrans Oracle SPARC/Solaris System Administrator Fujitsu M12 SPARC Specilaisthelp
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