On 2020-06-25 2:31 p.m., Alan Stern wrote:
On Thu, Jun 25, 2020 at 01:08:34PM -0400, James wrote:
I have an Alfa AWUS036ACM (Mediatek MT7612U) on a Raspberry Pi 4. with:
OpenWrt SNAPSHOT r13626-751e6ab8e6 / LuCI Master git-20.175.45303-bb95e67
Kernel Version: 5.4.48
# lsusb
Bus 002 Device 002: ID 0e8d:7612 MediaTek Inc.
|My AP keeps dieing (I suspect when it's under load and some other condition
:-(). mt76x2u 2-1:1.0: error: mt76x02u_mcu_wait_resp failed with -110| I
tried:
https://superuser.com/questions/176319/hard-reset-usb-in-ubuntu-10-04
Did you try running the usbreset program described in that web page?
I don't have that program and I can't compile on that platform.
I tried the script instead of trying to cross compile.
cd /sys/bus/usb/drivers/usb
echo 2-2 > unbind ; sleep 3 ; echo 2-2 > bind I think it should be 2-1 so I
tried that:
echo 2-1 > unbind ; sleep 3 ; echo 2-1 > bind
|[ 3539.309730] mt76x2u 2-1:1.0: firmware upload failed: -110
[ 3540.828260] mt76x2u: probe of 2-1:1.0 failed with error -5|
That didn't work.
Physically removing reinserting works (if I also "reset" the wifi in OpenWrt
(I don't know what this does)).
There must be a way to remove/reinsert in software instead of rebooting.
Well no, actually there isn't. Removing a cable breaks the power
connection; if the device gets its power from the USB cable then it goes
through a complete shutdown (and restart when you plug it back in). On
most computers and USB hubs, there is no way to turn off power to the USB
ports in software -- the hardware simply won't do it. _Some_ hubs can
turn off port power, but most can't.
It is possible to do various sorts of reset in software, such as by using
the usbreset program mentioned above. But none of them do exactly the
same thing as unplugging and replugging the USB cable.
Alan Stern
I guess I'll have to reboot if it loses the AP.
I can automate that. :-)
