Re: Raspberry Pi 3B USB Printing Issue

From: Hans Petter Selasky <hps_at_selasky.org>
Date: Sat, 12 Mar 2022 08:41:19 UTC 
On 3/12/22 08:07, Archimedes Gaviola wrote:
> ugen1.5: <EPSON EPSON UB-U03II> at usbus1
> ulpt1 on uhub1
> ulpt1: <EPSON EPSON UB-U03II, class 0/0, rev 1.10/2.00, addr 5> on usbus1
> device_attach: ulpt1 attach returned 12

12 : man errno :
      12 ENOMEM Cannot allocate memory.

I guess the EPSON printer you've got is not compatible with ulpt<n>

When printing, can you make sure that the length transferred is never a 
multiple of 64 bytes?

Also, there might be a bug lurking in the USB host controller driver, 
like already mentioned.

--HPS