Serial Port Bug?

[Karl Larsen]

Lamar Owen wrote:
> On Wednesday 28 November 2007, Karl Larsen wrote:
>   
>> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
>>
>> Nothing about being set up in dmesg. It appears the kernel correctly
>> sees the driver. But for some reason it is not turned on.
>>     
>
> If the kernel's serial driver sees a serial port enabled it will print three 
> lines (not just one) like this:
> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
> serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 00:07: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
>
> On my F8 laptop, which has no serial ports, I still get:
> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
>
> but no actual ports are found.  Just because the kernel loads the serial 
> driver doesn't mean it saw a serial port.
>
> So I ask again: is your serial port enabled or disabled in the BIOS?  All 
> modern BIOS's have the capability to disable the serial ports in hardware to 
> where the kernel will not see the ports.
>
> Checking voltages won't help you if the chip interface has been disabled from 
> the BIOS setup program.
>   
    What is the serial port called in the BIOS? I have looked and never 
found anything looking like serial port. I will be sure able to do that 
IF I know what it is called.



-- 

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