[ltp] 600E-2645-4AU and serial port problems

[Ken Restivo]

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OK, I've pulled the pnpbios stuff out of -ac3 and made a pnpbios-only patch to apply to my nice clean debian 2.4.18 kernel.

Along the way I found this gem in i386/kernel/traps.c:

     extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
     extern u32 pnp_bios_is_utter_crap;
     pnp_bios_is_utter_crap = 1;

gcc -O2 almost certainly optimises this out. But damn that wins "Code Comment of the Week", even if it wasn't strictly inside /*  */'s.

- -ken
- ------
On Sat, Apr 19, 2003 at 02:18:59AM -0500, wes schreiner wrote:
> Ken Restivo wrote:
> 
> >lspnp doesn't work, because I'm using a 2.4 kernel, so there's no 
> >"proc/bus/pnp" as is expected by lspnp. It seems that setpnp/lspnp has 
> >been deprecated in favour of isa-pnp.
> >
> 
> No, PNP support is too new for the the mainline 2.4.x kernel, but you 
> can get it in the -ac patches and it is probably included in others. For 
> example, even a kernel as recent as 2.4.21-pre6 doesn't have PNP, but 
> 2.4.x-ac kernels have had it for about a year. Some vendor kernels may 
> be patched for PNP but I don't know which ones. PNP doesn't really have 
> anything to do with isa-pnp, and isa-pnp devices are obsolescent. Once 
> you boot a kernel with PNP support you will have /proc/bus/pnp, and 
> lspnp/setpnp will work fine.
> 
> >I'm not using PS2.EXE, because I don't have DOS or Windoze on this thing, 
> >only Linux partitions and a single FAT32 partition with a hibernate file 
> >on it (hmm... will PS2.EXE work under dosemu-freedos? Just wondering...).
> > 
> >
> I doubt that PS2.EXE will work under dosemu because of how it will want 
> to frob the hardware directly. You can always boot off of a MSDOS floppy 
> and then run PS2.EXE off of another floppy. Or if your FAT32 partition 
> has a couple meg free you can put PS2.EXE and its associated files there 
> and either make the partition bootable to MSDOS or boot off of a floppy. 
> PS2.EXE runs slowly off of a floppy but it gets the job done eventually. 
> PS2.EXE might run under native freedos but I haven't tried that.
> 
> There are a few things that PS2.EXE can do that aren't covered by setpnp 
> or tpctl so you really can't avoid it. However all of the serial port 
> settings can be read/set by lspnp/setpnp as long as your kernel has PNP 
> support.
> 
> wes
> 
> -- 
> The linux-thinkpad mailing list home page is at:
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad

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