Bug#279491: No disk detected on an IBM RS6000 7043-260 (sym53c8xx driver)
Jens,
On Wednesday 03 November 2004 14:28, Jens Schmalzing wrote:
> Alessandro Amici writes:
> > - the SCSI driver (sym53c8xx)
>
> Which chip exactly?
the lspci output (from memory) had two entries: sym53c875 and sym53c895.
i don't know which of the two is the one giving the errors.
i also found the same chipsets reported on:
http://www.google.it/search?q=cache:PUNlF7Q6X5gJ:www-124.ibm.com/linux/projects/ppc/power3bootlog.txt+260+sym53c895&hl=it&ie=UTF-8
> > [...] it looks like an irq problem, the fact that the d-i uses a
> > 32bit kernel on a 64bit can well be to be the trigger,
>
> A similar problem was fixed for PReP systems a while ago. Before
> that, I worked around it by setting CONFIG_SCSI_SYM53C8XX_IOMAPPED.
>
> > so i am currently trying to re-compile the debian kernel without the
> > drivers-scsi-sym53c8xx_revert.dpatch.bz2 patch and/or try a ppc64
> > cross-build. but tha machine is not easily reachable and i need to
> > integrate the kernel in the d-i enviroment (not easy for me!)
as i said in a previous follow up to this bug report the
drivers-scsi-sym53c8xx_revert.dpatch has nothing to do with my problem (i.e.
was not applied, in the first place).
FYI1 - i forgot to report that the problem appear also with the SCSI cable
unplugged
FYI2 - Leigh Brown confirmed the report on another almost identical machine
(7043-260). he seemed interested by the problem, but i don't know whether he
is actually investigating further.
so the CONFIG_SCSI_SYM53C8XX_IOMAPPED=y work-around is the only thing i can
try to do.
> If you are recompiling the Debian kernel, you only need to exchange
> the sym53c8xx driver itself. This can even be done on the fly, if you
> manage to get a shell from d-i (for example by starting in expert
> mode).
not that easy to do (you have only a few seconds between the unpacking of
scsi-modules udeb and the fatal modprobe. i already tried that for a
different reason :-), but feasible and much simpler than recompiling the d-i.
tanks for the hint ;)
cheers,
alessandro
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