[Bug 230032] Intel graphics driver fails to detect DVI output

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230032

            Bug ID: 230032
           Summary: Intel graphics driver fails to detect DVI output
           Product: Base System
           Version: 11.2-RELEASE
          Hardware: amd64
               URL: https://forums.freebsd.org/threads/xorg-intel-driver-o
                    n-freebsd-11-2-no-longer-detects-dvi-output.66824/
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: felixstella at protonmail.com

Created attachment 195440
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=195440&action=edit
FreeBSD kernel messages on loading the intel graphics driver in base

I have an Intel 945G graphics card that has two outputs - one is the analog VGA
output and the other is the digital DVI output. I have connected my sole
digital monitor to the DVI output. This setup worked without any problems on
FreeBSD 10.3. It also continues to work without problems on Debian 9.

On FreeBSD 11.2, the intel graphics driver fails to detect the DVI output of
the graphics card, and consequently, I get a blank screen after the driver is
loaded, either manually through the kldload command or by starting Xorg.

This behavior also occurs if I try to use the graphics/drm-stable-kmod port,
leading me to believe that it is a fundamental kernel/driver regression.

I have attached the relevant FreeBSD kernel messages and Xorg logs, and also
the Debian Xorg log for reference.

-- 
You are receiving this mail because:
You are the assignee for the bug.