FreeBSD-12 / i915 on librem13 at purism - hang on suspend after update

[Dirk-Willem van Gulik]

> On 29 Dec 2018, at 22:18, Niclas Zeising <zeising+freebsd at daemonic.se> wrote:
> On 12/29/18 9:46 PM, Dirk-Willem van Gulik wrote:
>> After a routine update to FreeBSD-12.0-RELEASE and a ports update -- I am getting hard hangs on suspend on a librem13 laptop with the i915 chipset (works fine until that point).
>> Screen lit up but black; does not respond to the off-key/alt-F1/vty and not a peep on serial/network (so likely a fairly hard hang). Have tried both with and without letting it load the firmware.
>> Does that ring a bell with anyone ? Any clever ways to debug such a hang ?

>> FreeBSD-12.0
>> drm-fbsd12.0-kmod-4.16.g20181215
>> drm-kmod-g20181126
>> gpu-firmware-kmod-g20180825
> 
> Which version did you upgrade from?  Which CPU and GPU do you have?

From 11.1. CPU is a Core i7 6500U (Skylake) with a Intel HD Graphics 520 card using the build in screen*.

> Can you try drm-fbsd11.2-kmod (it works on 12.0), or drm-legacy-kmod?

No luck there on either version. 

Dw

full specs: https://puri.sm/products/librem-13/#specs

pkg info
	drm-fbsd11.2-kmod-4.11g20181210
	gpu-firmware-kmod-g20181104

kldstat -v
..
17    1 0xffffffff82c23000  120400 i915kms.ko (/boot/modules/i915kms.ko)
18    1 0xffffffff82d44000    74770 drm.ko (/boot/modules/drm.ko)
22    1 0xffffffff82ddd000    2283f i915_skl_huc_ver01_07_bin.ko (/boot/modules/i915_skl_huc_ver01_07_bin.ko)
23    1 0xffffffff82e00000    245d i915_skl_dmc_ver1_26_bin.ko (/boot/modules/i915_skl_dmc_ver1_26_bin.ko)