wlan freezes in raspberry pi 3/PiZeroW (Not 3B+)

[dh-connect]

I put the same sd card (running debian 8 jessie, kernel 4.1.19) from the raspberry pi 2 with usb wifi (EDIMAX EW-7811UN Wireless USB Adapter, 150 Mbit/s, IEEE802.11b/g/n) into the new raspberry pi 3 using integrated wlan. Since then the wlan freezes after while (several hours) of usage couldn't find out if it's due to havy wifi usage or not, because I haven't change the software I guess it has to do with the new hardware. When the wlan freezes the pi can't be reached any longer, neither ifdown + ifup nor restart networking service helps in this case, I have to reboot the system to get it back to work, syslog doesn't say much only this:
dhcpcd[522]: wlan0: fe80::8af7:c7ff:fece:5912: expired option 25,

I've tried to change these settings so far, but without improvement:

sudo nano /etc/network/interfaces
wireless-power off

sudo nano /etc/sysctl.conf
at the end of the file add the following line
vm.min_free_kbytes = 16384

sudo nano /boot/cmdline.txt
At the end of the line, add:
smsc95xx.turbo_mode=N
dwc_otg.dma_enable=1 dwc_otg.dma_burst_size=256

[clivem]

EDIMAX EW-7811UN.... That's using rtl8188cus chipset, IIRC.

If you haven't already got one, create /etc/modprobe.d/8192cu.conf, with content....

Disable power management

options 8192cu rtw_power_mgnt=0 rtw_enusbss=0

[Hecatron]

The rpi3 actually uses the brcmfmac driver for the inbuilt wifi
there is an issue that requires the power saving / mangement to be turned off

I think the newer raspian kernels have patched this already to disable power saving by default but I don't think it's in this 4.5 branch yet

What I'm doing at the moment (gentoo install) is the following at bootup to disable the power saving on the wifi card

iw wlan0 set power_save off

[clivem]

The rpi3 actually uses the brcmfmac driver for the inbuilt wifi

Yes, I know. Oh I see. He's not using the EDIMAX EW-7811UN dongle anymore. He used to use it with RPi2.

[dh-connect]

yes I don't use the usb wifi any longer, how do I set up the cmd line to turn off the power management?
crontab
@reboot iw wlan0 set power_save off

[Hecatron]

Not sure for raspian, since I'm using gentoo it'll be different

[pelwell]

Try this: https://gist.github.com/mkb/40bf48bc401ffa0cc4d3

[dh-connect]

Seems to work since I have turned the powermanagement off I haven't had another wlan crash.

[dh-connect]

Just to mentioned it, to restart the wlan automatically after a crash, this here helps:
sudo cp /etc/wpa_supplicant/ifupdown.sh /etc/ifplugd/action.d/ifupdown

[popcornmix]

BTW, latest apt-get upgrade kernel has power management disabled by default.
@dh-connect does this work for you if you remove your current workaround?

[dh-connect]

it's still crashing after the latest upgrade, now i get this error in syslog:
brcmfmac: brcmf_sdio_bus_txdata: out of bus->txq !!!

[pelwell]

When you say it's crashing, are there symptoms other than the error message?

[dh-connect]

no, just the one I have posted here but it is in the log many times

the wlan stops working, i can still work with it but to get the wlan back working I have to reboot it

[pelwell]

Thanks - I think "wlan stops working" counts as a symptom.

[dh-connect]

I've tried a few things, but wlan still breaks down

to answer the question above when I take back the configuration
wireless-power off in /etc/network/interfaces
and reboot
and check the settings with iwconfig
the power management ist turned back on so by default I wouldn't say that this is diasbled so I will leave the configuration

I tried that with kernel 4.1.19 and now also with kernel 4.1.20 ... no change

when the wlan crashed and i try to turn it back on with ifdown and ifup wlan0 I get this:
Error for wireless request "Set Power Management" (8B2C) : SET failed on device wlan0 ; Invalid exchange.

I also got a few more error in syslog:

dhcpcd[532]: wlan0: xxx: expired option 25

Mar 21 17:29:35 raspberrypi kernel: [ 6627.337503] brcmfmac: _brcmf_set_multicast_list: Setting mcast_list failed, -52
Mar 21 17:29:36 raspberrypi wpa_supplicant[6318]: Successfully initialized wpa_supplicant
Mar 21 17:29:36 raspberrypi dhcpcd[532]: wlan0: carrier lost

Mar 21 17:29:43 raspberrypi kernel: [ 6635.337616] brcmfmac: _brcmf_set_multicast_list: Setting mcast_list failed, -52

Mar 21 17:29:45 raspberrypi kernel: [ 6637.337588] brcmfmac: brcmf_do_escan: error (-52)
Mar 21 17:29:45 raspberrypi kernel: [ 6637.337602] brcmfmac: brcmf_cfg80211_scan: scan error (-52)

Mar 21 17:29:47 raspberrypi kernel: [ 6639.337596] brcmfmac: _brcmf_set_multicast_list: Setting allmulti failed, -52
Mar 21 17:29:49 raspberrypi kernel: [ 6641.337632] brcmfmac: _brcmf_set_multicast_list: Setting BRCMF_C_SET_PROMISC failed, -52

is there anything else I could try?

[dh-connect]

also these:

Mar 21 21:26:55 raspberrypi dhcpcd[526]: wlan0: xxx: expired option 25
Mar 21 21:28:54 raspberrypi kernel: [ 1958.899715] brcmfmac: brcmf_sdio_hostmail: Unknown mailbox data content: 0x40012
Mar 21 21:30:16 raspberrypi dhcpcd[526]: wlan0: xxx is unreachable, expiring it