Estou executando o Fedora 17 Linux em um computador Advantech ARK-3440 (Ficha de dados).
De tempos em tempos (digamos 5 vezes desde 1º de janeiro), ele perde espontaneamente sua interface de rede. Nos logs /var/log/messages* do Linux, vejo que a interface parece desaparecer brevemente e depois voltar. Mas, ao voltar, não poderá ser adicionado novamente pelo Linux.
Aqui está um trecho:
Jan 28 16:17:27 localhost kernel: [168424.859993] pciehp 0000:00:1c.4:pcie04: Card not present on Slot(0-4)
Jan 28 16:17:27 localhost kernel: [168424.864098] pciehp 0000:00:1c.4:pcie04: Card present on Slot(0-4)
Jan 28 16:17:27 localhost avahi-daemon[423]: Interface p2p1.IPv4 no longer relevant for mDNS.
Jan 28 16:17:27 localhost avahi-daemon[423]: Leaving mDNS multicast group on interface p2p1.IPv4 with address 10.9.20.224.
Jan 28 16:17:27 localhost avahi-daemon[423]: Withdrawing address record for fe80::20b:abff:feb5:9532 on p2p1.
Jan 28 16:17:27 localhost avahi-daemon[423]: Withdrawing address record for 10.9.20.224 on p2p1.
Jan 28 16:17:27 localhost avahi-daemon[423]: Withdrawing workstation service for p2p1.
Jan 28 16:17:28 localhost kernel: [168425.886823] pciehp 0000:00:1c.4:pcie04: Device 0000:05:00.0 already exists at 0000:05:00, cannot hot-add
Jan 28 16:17:28 localhost kernel: [168425.886833] pciehp 0000:00:1c.4:pcie04: Cannot add device at 0000:05:00
Aqui está a saída do uname e do lspci:
[root@localhost ~]# uname -a
Linux localhost.localdomain 3.3.4-5.fc17.i686.PAE #1 SMP Mon May 7 17:37:39 UTC 2012 i686 i686 i386 GNU/Linux
[root@localhost ~]#
[root@localhost ~]# lspci
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 18)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06)
00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 06)
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 06)
00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 06)
00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 06)
00:1c.6 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 7 (rev 06)
00:1c.7 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 8 (rev 06)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
00:1f.2 IDE interface: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA IDE Controller (rev 06)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)
05:00.0 Ethernet controller: Intel Corporation 82583V Gigabit Network Connection
ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 05)
ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 05)
ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 05)
ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 05)
ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 05)
ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 05)
Alguém tem experiência com esse problema ou alguma sugestão sobre o que pode ser ou como solucionar? Isso poderia ser um verdadeiro problema de hardware? Ou mais provavelmente um problema no Linux?
Pesquisei e encontrei postagens semelhantes sobre o tópico "Cartão não presente", mas não há respostas adequadas. Alguns sugerem reconstruir o Linux sem suporte hotplug...
Qualquer ajuda é muito apreciada. Obrigado.