On 22.05.2017 15:57, Hans Petter Selasky wrote: > What is the occurrence rate of this IOERROR? Once per attach/detach. Lets try do tun dump together with dmesg... ERR=IOERROR and ERR=CANCELLED are correlated with disconnects, one of these two is always at same time as disconnect.
> Did you try to connect the USB device to a different port and/or USB HUB. I've tried different port, but not hub (I don't have any). I've tried other cable too. > It might also be that the user-space driver tries to reset the device > when it sees this error. To figure that out you'll need to enable > debugging in the UPS software package. If UPS software is not running, flickering is the same. It doesn't depend on running of UPS software (sysutils/nut, nothing fancy or closed-sourced). -- // Lev Serebryakov
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