Re: [PATCH] mwifiex: Add quirk to disable deep sleep with certain hardware revision

On Wed, Nov 03, 2021 at 01:25:44PM +0100, Jonas Dreßler wrote:

The issue only appeared for some community members using Surface devices,
happening on the Surface Book 2 of one person, but not on the Surface Book
2 of another person. When investigating we were poking around in the dark
for a long time and almost gave up until we found that those two devices
had different hardware revisions of the same wifi card installed (ChipRev
20 vs 21).

So it seems pretty clear that with revision 21 they fixed some hardware
bug that causes those spurious wakeups.

Seems reasonable, thanks for the thorough handling!

FWIW, obviously a proper workaround for this would have to be implemented
in the firmware.

Yeah, but you only get those if you're a paying customer apparently :(

I wonder if the original OEM got firmware fixes, but because they don't
use Linux, nobody bothered to roll those into the linux-firmware repo.

Brian