This is weirder - right now Doukan with uparrow+D+S started, also log off from doukan to kindle OS worked. Still can not access kindle via USB
Update_usbnetwork_0.57.N_dxg_install <- this file has read where is written to make active auto.bin file.
But how to reverse it and make it disabled? to get USB kindle <> pc connection working.
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I did it!
tap the Del key on the Kindle DX keyboard. A prompt will appear. Type ;debugOn and press Return. Note the semicolon at the beginning of the command; you can produce it by using the Sym key. Next, tap Del again. Type ~usbNetwork and press Return. This command starts with a backtick, which you also produce via the Sym key. Make sure that it's a backtick, not a single quotation mark. Once you have that, tap Del one last time. Type ;debugOff and press Return.
thank to
https://tinyapps.org/docs/e-ink-monitor.html quote: "† The backtick (`) is used in Kindle Version 2.x and earlier; the tilde (~) in Kindle Version 3 and later."
I have used ~ insted of ` and USB connection works.