Virtuos HT-310A + Pi 3+ = randomly repeats the last character in the code when scanning

[marekf]

Hi, I have a Raspberry Pi 3B which I use via wtware to connect to RDP windows. I have a Virtuos HT+310A barcode scanner connected to the Pi 3. When I scan the code, it randomly adds the last character from the code at the end one more time. For example the code 12345678 reads as 123456788, ABC as ABCC.
I have 7 scanners. They all do this.
I have 7 Rpi 3B scanners, they all do it.
But if I connect the Virtuos to a normal PC, the scanning is OK.
If I connect another scanner like Virtuos HT-310A to Rpi 3, it is also OK (I have 5 different models).
If I connect the Virtuos HT-310A to the Rpi 4, the scanning is OK
Only if I connect the Virtuos HT-310A to the Rpi 3 there is a problem.
Of course I tried programming the scanner but it didn't help...
Do you have any idea?

[akatik]

Try to add "dwc_otg.speed=1" to cmdline.txt on boot SD. Single line in cmdline.txt file:

Code: Select all

dwc_otg.speed=1 quiet wtboot=mmc

There is a lot of magic in kernel command line, but i don't know it.