On Sun, Apr 28, 2019 at 07:26:54PM -0400, Charles wrote: > Hello list, > > Ever since the new inteldrm driver got merged into -current, shortly > before the 6.5 release, I'm seeing an odd new behavior on my Thinkpad > T430 -- when an external display is connected, Xorg blanks all screens > (but the mouse can still be seen) until I switch to a TTY and back with > (i.e. C-A-F4 then C-A-F5) after which point it goes back to normal. > > I'm glad the new inteldrm driver got merged, since it fixes several > other video issues I was having. This problem is very minor since the > workaround is just a few extra keystrokes when I dock or undock, but it > is nevertheless annoying. > > Is anyone else experiencing this issue on third gen core-I series Intel > chips with integrated graphics? Or on any other chips for that matter? > > I checked Xorg.0.log and didn't see anything suspicious. I also tried > disabling monitor hotplugging via Xorg.conf, but I either did it wrong > or it had no effect. > > I would attach xorg logs and dmesg, but AFAIK misc@ does not allow > attachments, and I don't want to annoy people with that much inline > info.
Does this help? Index: sys/dev/pci/drm/drm_fb_helper.c =================================================================== RCS file: /cvs/src/sys/dev/pci/drm/drm_fb_helper.c,v retrieving revision 1.13 diff -u -p -r1.13 drm_fb_helper.c --- sys/dev/pci/drm/drm_fb_helper.c 14 Apr 2019 10:14:51 -0000 1.13 +++ sys/dev/pci/drm/drm_fb_helper.c 29 Apr 2019 06:58:25 -0000 @@ -575,6 +575,9 @@ static bool drm_fb_helper_is_bound(struc #ifdef notyet if (READ_ONCE(dev->master)) return false; +#else + if (!SPLAY_EMPTY(&dev->files)) + return false; #endif drm_for_each_crtc(crtc, dev) {