Serial Port Bug?

[Karl Larsen]

Lamar Owen wrote:
> On Wednesday 28 November 2007, Karl Larsen wrote:
>   
>> Lamar Owen wrote:
>>     
>>> Is the serial port enabled in the BIOS?
>>>       
>
>   
>>     I have looked and found nothing in the many pages of BIOS things but
>> I could of missed it.
>>     
>
> What model Biostar MB is this?  All their manuals are online; older ones 
> especially included screenshots of the setup screens.  Look for, in 
> the 'integrated peripherals' setup section the 'COM1' and 'COM2' settings 
> (the names might be different; I don't have a Biostar board in front of me 
> (got one at home, though, that I might put on the breadboard and check out)).
>
>   
>>     This is from #setserial -a /dev/ttyS0:
>>
>> [root at k5di ~]# setserial /dev/ttyS0 -a
>> /dev/ttyS0, Line 0, UART: unknown, Port: 0x03f8, IRQ: 4
>>         Baud_base: 115200, close_delay: 50, divisor: 0
>>         closing_wait: 3000
>>         Flags: spd_normal skip_test auto_irq
>>     
>
>   
>> This I think is good.
>>     
>
> UART is unknown; no, this is bad.  If the kernel can't detect the type of UART 
> (it will likely be 16550A or similar for virtually all modern MB's) then it 
> can't use the port.
>
> On my own laptop, which does not have ANY serial ports:
> [root at localhost ~]# setserial /dev/ttyS0 -a
> /dev/ttyS0, Line 0, UART: unknown, Port: 0x03f8, IRQ: 4
>         Baud_base: 115200, close_delay: 50, divisor: 0
>         closing_wait: 3000
>         Flags: spd_normal skip_test auto_irq
>
> [root at localhost ~]#  
>
> So setserial doesn't help troubleshoot this.
>
> On the box with one serial port:
> [root at itadmin ~]# setserial /dev/ttyS0 -a
> /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
>         Baud_base: 115200, close_delay: 50, divisor: 0
>         closing_wait: 3000
>         Flags: spd_normal skip_test
>
> [root at itadmin ~]#             
>
> UART is a 16550A, and works.
>   
    OK I do not have a manual about BIOS. If they have one I will get it!



-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.