Re: STI problem and workaround for Dell XPS 13 (Skylake, 2016) / Broadcom BCM4350

[Tamas Papp <tkpapp@gmail.com>]

On Wed, Mar 02 2016, yu chen wrote:

> On Wed, Mar 2, 2016 at 5:51 PM, Tamas Papp <tkpapp@gmail.com> wrote:
>> Hi,
>>
>> I have a Dell XPS 13 (Skylake, 2016) and wanted to get STI working, so I
>> followed the instructions at [1]. I found that the Broadcom wireless
>> chip is waking the machine up from STI / freeze.
>>
>> A workaround is
>>
>> INTERFACE=wlp58s0
>> ifconfig $INTERFACE down
>> modprobe -r brcmfmac && echo freeze > /sys/power/state && modprobe brcmfmac
>> ifconfig $INTERFACE up
>>
>> I thought I would ask whether I should report this as a bug, and if yes,
>> where.
>>
> Some device drivers such as brcmac has the ability to wake the system
> up,  you can
> disable it by echo to /proc/acpi/wakeup IMO.

That's what I attempted first, but echo to /proc/acpi/wakeup just makes
the entry occur _twice_ -- what am I doing wrong?

root@tamas:~# cat /proc/acpi/wakeup | grep ena
PXSX      S4    *enabled   pci:0000:3a:00.0
PBTN      S3    *enabled   platform:PNP0C0C:00
root@tamas:~# echo PXSX > /proc/acpi/wakeup 
root@tamas:~# cat /proc/acpi/wakeup | grep ena
PXSX      S4    *enabled   pci:0000:3c:00.0
PXSX      S4    *enabled   pci:0000:3a:00.0
PBTN      S3    *enabled   platform:PNP0C0C:00
root@tamas:~# uname -r
4.5.0-040500rc6-generic

Best,

Tamas