Ticket #7657 (closed defect: duplicate)

Opened 5 years ago

Last modified 5 years ago

Serial port data transfer problems

Reported by: lazyest Owned by:
Priority: major Component: uart
Version: VirtualBox 3.2.10 Keywords: serial modem
Cc: Guest type: other
Host type: Linux


Host system - Debian squeeze 32 bit bigmem kernel. 3.2.10r66523. Guest system OS/2 WSeB 4.5, kernel 14.086, communication driver SIO 1.60. Two serial ports, /dev/ttyS1 and /dev/ttyS2 connected to COM1 and COM2 in guest system. There is some old-time fidonet mailer software running for direct data transfer between peers. As I run it, data transfer begans, established session with correct handshake procedure and after that, sending side reports unreal speed ~70k before other side drops connection because of errors. Com port seems like unfunctional after this, needs virtual machine reboot. Basing on I've decreased maximum packet size to 128b and got one of the modems working with low performance but second one still didn't work, getting garbage like ММ╠ (8C 8C CC hex) instead of RING. What should I do to help debug? There is two real modems on machine, I can try to transfer some data between it if you like.

Change History

comment:1 Changed 5 years ago by frank

  • Status changed from new to closed
  • Resolution set to duplicate

Opening duplicate tickets is not the help we expect.

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