drm-devel-kmod-4.16.g20180824 hangs my laptop

[Jakob Alvermark]

On 9/6/18 12:45 PM, Niclas Zeising wrote:
> On 09/06/18 12:35, Johannes Lundberg wrote:
>>
>> Jakob Alvermark writes:
>>
>>> Hi,
>>>
>>>
>>> When I updated to drm-devel-kmod-4.16.g20180824 my laptop hangs.
>>> Previous version of drm-devel-kmod worked.
>>>
>>> kld_list="/boot/modules/i915kms.ko" in /etc/rc.conf
>>>
>>> When it boots and the modules load the screen goes blank (backlight
>>> still on) and the machine is totally non-responsive.
>>>
>>> CPU: Intel(R) Pentium(R) CPU N3540 @ 2.16GHz (2166.72-MHz K8-class CPU)
>>>
>>> vgapci0 at pci0:0:2:0: class=0x030000 card=0x09331025 chip=0x0f318086
>>> rev=0x0e hdr=0x00
>>>    vendor = 'Intel Corporation'
>>>    device = 'Atom Processor Z36xxx/Z37xxx Series Graphics & Display'
>>>    class = display
>>>    subclass = VGA
>>>
>>
>> Hi
>>
>> Did you update the kernel as well?
>>
>> I think this is due to a change in HEAD. You need to wait until
>> the binary packages have been updated with a new build or build drm
>> drivers from ports/source with the new head in /usr/src.
>>
>> This would be the same for stable/next as well.
>
> Which versions of FreeBSD and of the -devel port were the last ones 
> that worked?  What happens if you downgrade the port to that version, 
> but keep the same version of FreeBSD base as is failing?


Did some further testing:

drm-devel-kmod-4.16.g20180822 does not work. Same thing as above, blank 
screen and hang.

drm-devel-kmod-4.15.g20180802 works.

I am now at r338488