drm-kmod on a ThinkPad T550

[Ruben Schade]

Hi all,

I bought myself a second-hand Broadwell ThinkPad T550 for my birthday! 
Everything else works well out of the box with amd64 12.1-RELEASE, but I 
can't get drm-kmod working.

Reported graphics:

 > # pciconf -lv | grep -A2 -B2 Graphics
 >
 > ==> vgapci0 at pci0:0:2:0: class=0x030000 card=0x222317aa \
 > ==>     chip=0x161680086 rev=0x09 hdr=0x00
 > ==> vendor = 'Intel Corporation'
 > ==> device = 'HD Graphics 5500'
 > ==> class  = display
 > ==> subclass = VGA

Did a clean install (adding my user to the video group), then updated 
the system:

 > # freebsd-update fetch install
 > # shutdown -r now
 > # uname -r
 >
 > ==> 12.1-RELEASE-p3

Then set pkg to use latest not quarterly, and install the driver:

 > # pkg bootstrap
 > # pkg update
 > # pkg install drm-kmod
 > # sysrc kld_load="/boot/modules/i915kms.ko"
 > # pkg info | grep drm
 >
 > ==> drm-fbsd12.0-kmod-4.16-g20200221
 > ==> drm-kmod-g20190710
 > ==> gpu-firmware-kmod-g20200130

After rebooting, vt still loads as 640x480, and dmesg shows nothing:

 > # dmesg | grep drm
 >
 > ==> *crickets!*

I saw there was an issue in 12.1-RELEASE's errata about drm-kmod, but 
the bugzilla threads say the package is now being built with 12.1-R so 
it should work.

Anyone see what I could be doing wrong?

Cheers,

-- 
Ruben Schade
https://rubenerd.com/