Suspend, resume, UEFI, CSM, drm-stable-kmod and drm-next-kmod with Radeon HD 7570M

[Graham Perrin]

On 22/08/2018 17:50, Pete Wright wrote:
>
> On 8/22/18 2:11 AM, Graham Perrin wrote:
>> HP EliteBook 8570p with AMD 'Thames' Radeon HD 7570M.

…

>> With and without drm-next-kmod:
>> if boot is hybrid UEFI with CSM,
>> then suspend occurs, but resume fails. No beep, the computer restarts.
>>
>> debug.acpi.resume_beep=1
>> in /boot/loader.conf for an audible beep.
>>
>> ----
>>
>> Please: might graphics/drm-devel-kmod be better for either the tearing (without CSM) or for suspend?
>
> not sure this will address this specific issue - but have you tested setting this sysctl knob and seeing if that fixes your resume issues:
> hw.acpi.reset_video=1
>
> -pete
>
Thanks again. Briefly:

- with CSM
- with hw.acpi.reset_video=1
- without using /boot/modules/radeonkms.ko
- FreeBSD 12.0-ALPHA2 #2 r337986: Fri Aug 17 22:01:23 BST 2018


Result:

- endless beep when resume is attempted.

A short press on the power button (around two seconds, not long enough to stop the computer) temporarily silences the beep.

----

<https://lists.freebsd.org/pipermail/freebsd-current/2018-August/070857.html> there's the additional advice from Johannes Lundberg. Updating the OS etc. now, I'll share test results in due course. *
*