Created attachment 182379 [details] dmesg.log I'm using Macbook Air 2012 for FreeBSD-11.0R. I found my Mini-DisplayPort to VGA adapter doesn't work to add second display for my presentation. I don't think my adapter is broken, because I rebooted my Macbook Air with OS X, it works. And I remember my adapter worked on FreeBSD-10.3R. On my FreeBSD-11.0R, I've seen following dmesg, since I attached the adapter. ``` $ dmesg | tail -5 error: [drm:pid0:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up error: [drm:pid0:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up error: [drm:pid0:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up error: [drm:pid0:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up error: [drm:pid0:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up $ uname -a FreeBSD air 11.0-RELEASE-p9 FreeBSD 11.0-RELEASE-p9 #0: Tue Apr 11 08:48:40 UTC 2017 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 ``` According to `https://wiki.freebsd.org/Intel_GPU`, I got debug messages with `sysctl hw.dri.debug=2`. See the attached `dmesg.log` file. For my hardware information, I attach `devinfo.log` and `pciconf.log`. For software information, I attach `kldstat.log`, `pkginfo.log` and `Xorg.0.log`.
Created attachment 182380 [details] devinfo.log
Created attachment 182381 [details] pciconf.log
Created attachment 182382 [details] kldstat.log
Created attachment 182383 [details] pkginfo.log
Created attachment 182384 [details] Xorg.0.log
This problem has been fixed by FreeBSD 11.2 with drm-next-kmod. I will close this PR.