Messages in this thread | | | Date | Fri, 14 Jul 2000 12:06:38 -0700 | From | David Ford <> | Subject | Re: Kernel without keyboard support. |
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I have had in the past, machines which ran incredibly slow when there was no keyboard plugged in. If you unplugged the keyboard, pings went from ~ .7ms to about 3000ms and slowly increased. I have also had machines where they simply wouldn't boot if a keyboard wasn't in. Note, I'm referring to OLD kernels and I have thrown that hardware away a long time ago.
-d
"Richard B. Johnson" wrote:
> On Fri, 14 Jul 2000, Agust Karlsson wrote: > > > Hi there. > > I am in the unfortunate position, that I need a kernel to run on a embedded > > system without keyboard support (no kbd HW). My only interface is a serial > > line and a EGA screen on the board. > > My question is: How can you compile a kernel that dos'nt check for keyboard > > or try to use one. > > Make config does not give me that opportunity. > > > > Regards. > > > > Agust Karlsson > > Pallas Informatik > > Allerød Denmark > > Just use your regular kernel. It boots fine without a keyboard installed. > Try it on your regular machine. If you plug in the keyboard after Linux > is up, the controller will init the keyboard and it will work (although > the default repeat-rate is slow). > > Some keyboard controllers might barf and give an interrupt which results > in a single complaint from the kernel, but who cares? If the idea is > to have a prefectly clean boot (no error message), just comment out > the appropriate printk(). > > If the hardware guys have decided to rip out the keyboard controller > to save 69 cents, you are in a world of hurt because that controller > controls much more than the keyboard. This is unlikely because the > keyboard controller is probably within the "Super I/O" chip on > a modern design and HW guys are not very good with hacksaws ~;) > > Cheers, > Dick Johnson > > Penguin : Linux version 2.2.15 on an i686 machine (797.90 BogoMips). > > "Memory is like gasoline. You use it up when you are running. Of > course you get it all back when you reboot..."; Actual explanation > obtained from the Micro$oft help desk. > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/
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