Re: Raspberry Pi 3B USB Printing Issue

In reply to: Archimedes Gaviola : "Re: Raspberry Pi 3B USB Printing Issue"
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From: Archimedes Gaviola <archimedes.gaviola_at_gmail.com>
Date: Sun, 20 Mar 2022 12:02:22 UTC
On Thu, Mar 17, 2022 at 10:35 PM Archimedes Gaviola <
archimedes.gaviola@gmail.com> wrote:

>
>
> On Thu, Mar 17, 2022 at 10:32 PM Hans Petter Selasky <hps@selasky.org>
> wrote:
>
>> On 3/17/22 14:54, Archimedes Gaviola wrote:
>> > Is this an expected
>> > behavior?
>>
>> Yes, you shouldn't rely on the ugen numbering. It depends on the actual
>> enumeration order.
>>
>
> Alright, this is noted. Thank you Hans!
>


Hi Hans,

For how many days I've been doing the automated printing the issue never
occurred with DWC OTG debug level 17 but still for sure the issue is
observed when debug is bypassed or disabled . That's why it's quite a
challenge for me to capture. Not sure why this debug level 17 issue never
appeared. Any ideas?

Meanwhile, I've tried enabling 'sysctl hw.usb.ugen.debug=17' and this is
what I've got. Not sure if this is helpful to you for any clue. When
exactly the printing issue occurred this is what happened as found in the
logs -> ugen_write_clear_stall_callback: f=0xffffa00016208d80: stall
cleared. Below is the complete /var/log/messages (appeared twice) and the
c-file-to-printer is my little printing program invoked.

Mar 20 14:39:04 generic kernel: ugen_open: flag=0x402 pid=1337
name=c-file-to-printer
Mar 20 14:39:04 generic kernel: ugen_ioctl: cmd=0x402c7413
Mar 20 14:39:04 generic kernel: ugen_ioctl: error=-3
Mar 20 14:39:04 generic kernel: ugen_ioctl_post: cmd=0x402c7413
Mar 20 14:39:04 generic kernel: ugen_ioctl_post: error=-3
Mar 20 14:39:04 generic kernel: ugen_ctrl_write_callback: actlen=0,
aframes=0
Mar 20 14:39:04 generic kernel: ugen_ctrl_write_callback: actlen=697,
aframes=1
Mar 20 14:39:04 generic kernel: ugen_close: flag=0x402 pid=1337
name=c-file-to-printer
Mar 20 14:39:04 generic kernel: ugen_close: no FIFOs
Mar 20 14:39:10 generic kernel: ugen_open: flag=0x402 pid=1338
name=c-file-to-printer
Mar 20 14:39:10 generic kernel: ugen_ioctl: cmd=0x402c7413
Mar 20 14:39:10 generic kernel: ugen_ioctl: error=-3
Mar 20 14:39:10 generic kernel: ugen_ioctl_post: cmd=0x402c7413
Mar 20 14:39:10 generic kernel: ugen_ioctl_post: error=-3
Mar 20 14:39:10 generic kernel: ugen_ctrl_write_callback: actlen=0,
aframes=0
Mar 20 14:39:10 generic kernel: ugen_ctrl_write_callback: actlen=697,
aframes=1
Mar 20 14:39:10 generic kernel: ugen_close: flag=0x402 pid=1338
name=c-file-to-printer
Mar 20 14:39:10 generic kernel: ugen_close: no FIFOs
Mar 20 14:39:15 generic kernel: ugen_open: flag=0x402 pid=1339
name=c-file-to-printer
Mar 20 14:39:15 generic kernel: ugen_ioctl: cmd=0x402c7413
Mar 20 14:39:15 generic kernel: ugen_ioctl: error=-3
Mar 20 14:39:15 generic kernel: ugen_ioctl_post: cmd=0x402c7413
Mar 20 14:39:15 generic kernel: ugen_ioctl_post: error=-3
Mar 20 14:39:15 generic kernel: ugen_ctrl_write_callback: actlen=0,
aframes=0
Mar 20 14:39:15 generic kernel: ugen_ctrl_write_callback: actlen=56,
aframes=1
Mar 20 14:39:15 generic kernel: ugen_write_clear_stall_callback:
f=0xffffa00016208d80: stall cleared
Mar 20 14:39:15 generic kernel: ugen_ctrl_write_callback: actlen=56,
aframes=1
Mar 20 14:39:15 generic kernel: ugen_close: flag=0x402 pid=1339
name=c-file-to-printer
Mar 20 14:39:15 generic kernel: ugen_close: no FIFOs
Mar 20 14:39:49 generic login[1169]: ROOT LOGIN (root) ON ttyv3
Mar 20 14:40:40 generic kernel: ugen_open: flag=0x402 pid=1346
name=c-file-to-printer
Mar 20 14:40:40 generic kernel: ugen_ioctl: cmd=0x402c7413
Mar 20 14:40:40 generic kernel: ugen_ioctl: error=-3
Mar 20 14:40:40 generic kernel: ugen_ioctl_post: cmd=0x402c7413
Mar 20 14:40:40 generic kernel: ugen_ioctl_post: error=-3
Mar 20 14:40:40 generic kernel: ugen_ctrl_write_callback: actlen=0,
aframes=0
Mar 20 14:40:40 generic kernel: ugen_ctrl_write_callback: actlen=72,
aframes=1
Mar 20 14:40:40 generic kernel: ugen_write_clear_stall_callback:
f=0xffffa00016208d80: stall cleared
Mar 20 14:40:40 generic kernel: ugen_ctrl_write_callback: actlen=72,
aframes=1
Mar 20 14:40:40 generic kernel: ugen_close: flag=0x402 pid=1346
name=c-file-to-printer
Mar 20 14:40:40 generic kernel: ugen_close: no FIFOs
Mar 20 14:40:51 generic kernel: ugen_open: flag=0x402 pid=1347
name=c-file-to-printer
Mar 20 14:40:51 generic kernel: ugen_ioctl: cmd=0x402c7413
Mar 20 14:40:51 generic kernel: ugen_ioctl: error=-3
Mar 20 14:40:51 generic kernel: ugen_ioctl_post: cmd=0x402c7413
Mar 20 14:40:51 generic kernel: ugen_ioctl_post: error=-3
Mar 20 14:40:51 generic kernel: ugen_ctrl_write_callback: actlen=0,
aframes=0
Mar 20 14:40:51 generic kernel: ugen_ctrl_write_callback: actlen=697,
aframes=1
Mar 20 14:40:51 generic kernel: ugen_close: flag=0x402 pid=1347
name=c-file-to-printer
Mar 20 14:40:51 generic kernel: ugen_close: no FIFOs

Thanks,
Archimedes