On 30/04/15 04:21, Chris Bainbridge wrote:
Supporting _OSI("Darwin") caused the MacBook firmware to expose the SBS,
resulting in intermittent hangs of several minutes on boot, and failure
to detect or report the battery. Fix this by adding a 5us delay to the
start of each SMBUS transaction. This timing is the result of
experimentation - hangs were observed with 3us but never with 5us.
G'day Chris,
Using 4.1-rc3 (whatever git head was from a couple of days ago) I've
still been seeing ACPI lockups on my Macbook Pro (11,1). It appears to
take a couple of suspend/resume cycles but seems to happen within 24
hours of booting whereas before this patch it was easy to hit.
As a test (and I do wonder if it'll lock up after I press send on this
E-mail) I upped the delay to 10us and I've now been up for 1 day, 17:23
with the battery still responding to polling.
To make it easier to reproduce, I've been running a script that polls
the battery every 60 seconds.
I figure I'll let it go for another couple of days, but I wanted to put
this out there in case anyone else is seeing lockups after a longer
period of uptime. The symptoms are the ACPI command just hangs as does
'cat /sys/class/power_supply/BAT0/status'. From there I can't suspend as
the tasks can't be frozen and I just end up hard booting the machine.
I've removed Len & Rafael from the cc.
Regards,
Brad
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