Hello,
Some news from my Shuttle XS35V4 (Celeron, with latest XS35V400.400 BIOS) and its graphic card. But first of all, thanks to the people who made those codes available:
http://cgit.freedesktop.org/drm-intel https://cgit.freedesktop.org/xorg/driver/xf86-video-intel
I am still using Fedora 23 Workstation (with the daily update).
I updated xf86-video-intel to the latest 2.99.917-544(-g8b8c9a3?) version. Then I booted using the freedesktop.org/drm-intel kernel which included the i915 1.6.0 20160124 graphic driver. My Shuttle graphic card is:
# lspci -nnk | egrep -iA3 "VGA" 00:02.0 VGA compatible controller [0300]: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0e) DeviceName: Onboard IGD Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Device [1297:4019] Kernel driver in use: i915
With the freedesktop.org/drm-intel kernel (currently a patched 4.5.0-rc2), my Linux ran for 14 hours whithout any crash. I stressed the box using two screens and three video streams.
Then I used the freedesktop.org/drm-intel content to patch a standard 4.5.0-rc2 downloaded from kernel.org. My Shuttle is now up and running 4.5.0-rc2 with the latest i915 1.6.0 20160124 kernel module and xf86-video-intel version 2.99.917-544. I think it should be much more stable now.
Best regards