I have a 1-month old Acer Aspire F5-573-58VX that came with Win-10 installed. It relies on its Intel i5-7200u for its graphics (HD 620). It runs Win-10 with no problems (other than Win-10 itself), so I do not suspect the hardware.
I succeeded in dual-booting Ubuntu 16.04 with EFI and secure-boot both enabled, but was suffering random freezes at 3-30 minutes of use, even after setting the c-state limit in grub. It hangs both with and without Intel microcode. So I upgraded to 16.10 hoping that a newer kernel would have a fix in it.
It's still freezing at random (many apps, and sometimes using only the desktop controls). It still has the c-state parameter in grub.
It appears that if I leave the system untouched with the cursor in an empty area, then no freeze will occur (I can see display changing) as long as I don't touch anything. Bittorrent runs reliably overnight, and then the machine can freeze within seconds of my moving the cursor to a control in the morning.
Thunderbird is also suspicious: I can work most of an hour OK as long as I never move the cursor over the scroll slider in the folder pane. However, bringing the cursor close enough to change the slider's appearance will usually freeze the machine. Update: I've now experienced a freeze while the cursor was stationary and I was merely typing into an email message window.
When it freezes, the machine goes quiet (it's not spinning). There's no message to the GUI, only a sudden halt. When frozen, soft restart and reboot (ctrl-alt-back & ctrl-alt-del) both fail. Only a forced power-off has had any effect. (I'll try your alt+sysreq combos in my next freeze).
Synaptic says I have an intel driver update utility installed, but I don't know if it has run. When I try to sudo it, I am told that the command is not found. I have been unable to locate it in the file system. If anyone knows where that goes (or where to hunt), that might be helpful.
I do not (yet) know how to ssh into the sick machine to get kernel logs or crash dumps. I'm a user-space programmer, not a sysadmin, so I have a learning curve to open the firewall enough to allow an intrusion, and more learning curves for the cryptic debugging tools.
var/log/kern.log has this:
Jan 14 10:43:26 prop6 kernel: [ 1.002400] [drm:parse_csr_fw [i915_bpo]] *ERROR* Unknown stepping info, firmware loading failed
Jan 14 10:43:26 prop6 kernel: [ 1.002405] i915_bpo 0000:00:02.0: Failed to load DMC firmware [https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling runtime power management.
Jan 14 10:43:26 prop6 kernel: [ 1.006089] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
Jan 14 10:43:26 prop6 kernel: [ 1.018209] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
Jan 14 10:43:26 prop6 kernel: [ 1.018522] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input5
Jan 14 10:43:26 prop6 kernel: [ 1.018601] [drm] Initialized i915_bpo 1.6.0 20160229 for 0000:00:02.0 on minor 0
Jan 14 10:43:26 prop6 kernel: [ 1.064117] r8169 0000:03:00.1 enp3s0f1: renamed from eth0
Jan 14 10:43:26 prop6 kernel: [ 1.142340] fbcon: inteldrmfb (fb0) is primary device
Jan 14 10:43:26 prop6 kernel: [ 1.142437] Console: switching to colour frame buffer device 240x67
Jan 14 10:43:26 prop6 kernel: [ 1.142466] i915_bpo 0000:00:02.0: fb0: inteldrmfb frame buffer device
My current work-around is to do as much work as possible in Win-10 :(
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