Leonid Podolny wrote this: > Hi, all, > I lack some background to debug this issue. > I have two serial ports on my box. Naturally, I would expect them to be > ttyS0 and ttyS1. Indeed, dmesg shows the following: > > [snip] > Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled > pnp: Device 00:06 activated. > 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A > pnp: Device 00:07 activated. > 00:07: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A > [snip] > > However, the actual nodes that udev (or hotplug?) creates are: > > [snip] > vyhuhol ~ # ls -l /dev/ttyS* > crw-rw---- 1 root uucp 4, 66 2007-06-26 09:04 /dev/ttyS2 > crw-rw---- 1 root uucp 4, 67 2007-06-26 09:04 /dev/ttyS3 > [snip] > > Needless to say, I'm unable to communicate with the port unless I > manually mknod ttyS0 with minor 64. > The question is: how do I make hotplug (or udev?) enumerate them > correctly, as ttyS0 and ttyS1? >
I had this kind of problem some weeks ago. I resolved it rmmod'ing 8250_pnp and 8250, sleeping 1 and modprobing them again in local.start. I know it wasn't a nice solution, but it worked for me.
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