I've an (Intel) HD4000 and from the point that inteldrm was added to current, X freezes on launch, and have to SSH in to reboot nicely. Read a post with a similar problem; reducing video memory to <128 MB was the trick to have X start on current.
I'm running yesterdays (20th May) -current, on a Lenovo Yoga 13, and there is no option for video memory in the BIOS. For 5.3 release however, X starts when I disable DPTF ( Intel dynamic platform & thermal framework). 5.2 release worked fine with this enabled. Question: is there a kernel option to reduce video memory used by the OS to see if the workaround is valid? Back to the point, X -configure returns a Segmentation fault 0x28, and when just running startx, Xorg.0.log reveals Output LVDS1 has no monitor section. (Note: 5.2 & 5.3 release returned same segfault, though X worked flawlessly with startx) A few snapshots back, X would start after booting single-user and rebooting, though failure-success rate was around 4:1. When it would start, running xbacklight would freeze X again. Also idling too long would cause X to freeze. Files attached: X -configure and startx logs, and pcidump Best, Jean [demime 1.01d removed an attachment of type application/x-gtar which had a name of yoga.tgz]