On my Linux 3.2.1 system, the kernel recognizes the additional serial devices
using the "pch_uart" driver. It looks like 3.1 has the same driver. I
recommend confirming that you have the pch_uart module (if not, you may have to
build it from kernel source) and then try "modprobe pch_uart".
-Peter
On Feb 11, 2012, at 12:26 PM, Philippe Vanhaesendonck wrote:
> Hello everybody!
>
> Does anybody have any luck with the 2nd serial on the net6501 under
> Linux 3.1?
>
> With Linux 2.6.X the dmesg show (copied from Wim):
>
>> [ 1.793175] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
>> [ 1.793401] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a TI16750
>> [ 1.794537] 0000:02:0a.1: ttyS1 at I/O 0x1020 (irq = 9) is a 16550A
>> [ 1.795004] 0000:02:0a.2: ttyS2 at I/O 0x1028 (irq = 9) is a 16550A
>> [ 1.795203] serial 0000:02:0a.3: enabling device (0000 -> 0003)
>> [ 1.795231] serial 0000:02:0a.3: can't find IRQ for PCI INT B;
> please try using pci=biosirq
>
>
> But under 3.1 it looks like ttyS1 is not recognized, I have:
>
>> [ 2.100734] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
>> [ 2.100734] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a TI16750
>> [ 2.148602] pci 0000:01:00.0: using bridge 0000:00:17.0 INT D to
> get IRQ 19
>> [ 2.148623] serial 0000:02:0a.1: PCI->APIC IRQ transform: INT D ->
> IRQ 19
>> [ 2.148801] pci 0000:01:00.0: using bridge 0000:00:17.0 INT D to
> get IRQ 19
>> [ 2.148819] serial 0000:02:0a.2: PCI->APIC IRQ transform: INT D ->
> IRQ 19
>> [ 2.148986] pci 0000:01:00.0: using bridge 0000:00:17.0 INT D to
> get IRQ 19
>> [ 2.149003] serial 0000:02:0a.3: PCI->APIC IRQ transform: INT D ->
> IRQ 19
>> [ 2.149167] pci 0000:01:00.0: using bridge 0000:00:17.0 INT D to
> get IRQ 19
>> [ 2.149184] serial 0000:02:0a.4: PCI->APIC IRQ transform: INT D ->
> IRQ 19
>
> Any idea?
>
> --
> Philippe
>
> --
> Philippe
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