Hi all,
I'm currently battling with a Macbook Pro 11.4, attempting to get all of its
hardware supported on FreeBSD. At the moment, I'm investigating whether it is
possible to get suspend/resume working at on 13.3-RELEASE-p4.
I've exhibited a few different behaviors:
Using the inbuilt SSD/NVMe ("SM951 AHCI"), I exhibit the following behaviour:
1A. No X, Using debug.acpi.suspend_bounce=1:
Successfully resumes, but the disk becomes unreadable/unwritable. The keyboard
is responsive but the mouse is not. I can continue some actions, but clearly
only what is cached in memory. I don't know whether this is expected: I'm using
ZFS with full disk encryption.
1B. No X, using debug.acpi.suspend_bounce=0:
The screen does not turn back on: but everything else seems to work like beep,
drive read/writing, keyboard, etc (I'm basically just typing in the blind).
2A. Using X and suspend_bounce=1:
The screen resumes but the disk becomes unreadable writable. The keyboard is
responsive but the mouse is not. The same as without X
2B. Using X and debug.acpi.suspend_bounce=0:
Everything works as well as expected. Keyboard and mouse work. Writing to the
disk works.
---
For the non-X use cases, I've built the kernel with the following minimal
configuration [config.txt]. A more minimal version may work, but I didn't
bother to trim it down any further. The behavior exhibited by the suspension is
the same as when built normally.
At the moment, case 2B is fine: I use X most of the time, and I don't use
suspend_bounce. But I would like to fiz the 1B case at least (no X). Are there
any suggestions of how to debug this?
FYI: It looks like the Linux kernel went through an issue with this version of
the Macbook too:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13cfc732160f
/ https://bugzilla.kernel.org/show_bug.cgi?id=103211. I've attempted to
recreate the patch and it loads, but does not seem to do anything
[asmc-patch.c.patch]. I have no idea if it is relevant or not.
An initial HW_PROBE can be found here:
https://bsd-hardware.info/?probe=6bade1eaf8
Cheers,
Joshua.
