Hi.

>>>>> "Cristian" ==   <[EMAIL PROTECTED]> writes:
Cristian> Hi, the message I sent to you came out from dmesg on a four Xeon processors
Cristian> server (Compaq model ProLiant 5500) / kernel 2.2.5 (but 2.0.36 produces
Cristian> exactly the same message).
Cristian> The reason I started the investigation is the malfunctioning of the
Cristian> network driver tlan 1.0  (for a Compaq Netelligent 10/100 TX PCI UTP).
Cristian> Everything seems correct (after autonegotiation the link apears to be up),
Cristian> but there no communication. 
Cristian> I don't know if there is a link between the two problems (IO-APIC warning 
Cristian> and the malfunctioning of tlan driver).

This is IRQ dispatch problem on Compaq machines.  Try linux 2.2.6-ac1
with "noapic" boot option. If you want to use interrupt distribution,
try kernel with following patch. This kernel works on Compaq ProLiant
6500 Quad Xeon server, but it may not work on your machine.

linux/arch/i386/kernel/smp.c
=====================================
*** smp.c.org   Tue Apr  6 14:37:29 1999
--- smp.c       Thu Apr 15 17:21:13 1999
***************
*** 348,354 ****
                                        mp_bus_id_to_type[m->mpc_busid] =
                                                MP_BUS_PCI;
                                        mp_bus_id_to_pci_bus[m->mpc_busid] =
!                                               mp_current_pci_id;
                                        mp_current_pci_id++;
                                }
                                mpt+=sizeof(*m);
--- 348,354 ----
                                        mp_bus_id_to_type[m->mpc_busid] =
                                                MP_BUS_PCI;
                                        mp_bus_id_to_pci_bus[m->mpc_busid] =
!                                               m->mpc_busid;
                                        mp_current_pci_id++;
                                }
                                mpt+=sizeof(*m);
=====================================
-----
Shinji Sumimoto    E-Mail: [EMAIL PROTECTED]
Real World Computing Partnership, Japan.
URL: http://pdswww.rwcp.or.jp
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