Re: Cheap UPS with USB «flicker» with FreeBSD but not with Windows

[Lev Serebryakov]

On 17.04.2020 18:04, Hans Petter Selasky wrote:

>>> sysctl hw.usb.disable_enumeration=1
>>>
>>> Does your device still function?
>>   Nope, it still disappears.
> 
> You must set this while the device is attached.
 Yep, I understand this. I've wrote script which monitors presence of device (by checking existence of file in /dev), and when it change status from "not present" to "present" script sets this sysctl. After that device disappears in 10-15 seconds and never re-appears (which is not surprising, as enumeration is disabled!).

> You can also enable UHUB debug messages (hw.usb.uhub.debug) to see exactly which event is causing this.
 I don't have such subtree:

# sysctl hw.usb
hw.usb.ucom.cons_baud: 9600
hw.usb.ucom.cons_subunit: 0
hw.usb.ucom.cons_unit: -1
hw.usb.ucom.device_mode_console: 1
hw.usb.ucom.pps_mode: 0
hw.usb.uftdi.skip_jtag_interfaces: 1
hw.usb.full_ddesc: 0
hw.usb.no_cs_fail: 0
hw.usb.disable_port_power: 0
hw.usb.disable_enumeration: 0
hw.usb.power_timeout: 30
hw.usb.usb_lang_mask: 255
hw.usb.usb_lang_id: 9
hw.usb.template: -1
hw.usb.debug: 0
hw.usb.no_shutdown_wait: 0
hw.usb.no_suspend_wait: 0
hw.usb.no_boot_wait: 0
#

-- 
// Lev Serebryakov

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