Date: Wed, 9 Mar 2022 21:13:56 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Archimedes Gaviola <archimedes.gaviola@gmail.com>, freebsd-arm@freebsd.org Subject: Re: Raspberry Pi 3B USB Printing Issue Message-ID: <7c67118e-f6ec-c87d-9a81-3ee6a5952f49@selasky.org> In-Reply-To: <CAJFbk7EzSfPNbaGxiweKrivwNrKXCPVzA1b7_=0_bTvbs8oBow@mail.gmail.com> References: <CAJFbk7EzSfPNbaGxiweKrivwNrKXCPVzA1b7_=0_bTvbs8oBow@mail.gmail.com>
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On 3/9/22 18:55, Archimedes Gaviola wrote: > Hi, > > I have an Epson printer connected to one of the USB ports of my RPi 3B. The > printer is detected as a ugen(4) driver and then I have a text file - > myfile3.txt which contains 10 lines of repeating sentences. > > freebsd@generic:~ % dmesg | grep EPSON > ugen1.4: <EPSON EPSON UB-U03II> at usbus1 > > freebsd@generic:~ % cat myfile3.txt > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > The quick brown fox jumps over the lazy dog. > > freebsd@generic:~ % cat myfile3.txt > /dev/usb/1.4.1 > > I print the file successfully through device file redirection with cat > command as described above. However, there were times that printing seemed > to suspend and withhold especially when my RPi 3B system got idle for some > period of time. Suspended or withhold in such a way that out of the 10 > lines there were only 2-3 lines to be printed in the paper. So, the only > remedy I have for now is to reboot the system to be able to get back to > normal printing. I'm using the 14.0-CURRENT #0 main-n253384-45c23c2608e: > Thu Feb 24 09:18:58 UTC 2022 and my RPi 4B does not manifest this behavior > using this same 14.0-CURRENT version. Any idea what's going on? > > I found these sysctl knobs thinking if some tweaks would help but not sure > what are the exact settings beyond these defaults. > > hw.usb.timings.port_resume_delay: 40 > hw.usb.timings.port_powerup_delay: 300 > hw.usb.timings.port_reset_recovery: 10 > hw.usb.timings.port_root_reset_delay: 200 > hw.usb.timings.port_reset_delay: 50 > > (Resend this message without dmesg and sysctl outputs as files are quite > big, sorry I didn't notice it.) > Hi, Why are you not using /dev/ulpt<N> ? /dev/usb/1.4.1 is the raw BULK endpoint. --HPS
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