A TwinHead PowerSlim 600, running Debian 2.2, has a problem with its Ethernet card, a 3com FE575CT. It works but, from time to time (after one hour or two) the card is no longer usable: no IP packet comes out.
The log says: Sep 11 12:04:08 theleme kernel: eth0: transmit timed out, tx_status 00 status e000. Sep 11 12:04:08 theleme kernel: Flags; bus-master 1, full 1; dirty 3658 current 3674. Sep 11 12:04:08 theleme kernel: Transmit list fffffff8 vs. c5baa2a0. Sep 11 12:04:08 theleme kernel: 0: @c5baa200 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 1: @c5baa210 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 2: @c5baa220 length 8000002a status 8000002a Sep 11 12:04:08 theleme kernel: 3: @c5baa230 length 8000002a status 8000002a Sep 11 12:04:08 theleme kernel: 4: @c5baa240 length 8000002a status 8000002a Sep 11 12:04:08 theleme kernel: 5: @c5baa250 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 6: @c5baa260 length 8000002a status 8000002a Sep 11 12:04:08 theleme kernel: 7: @c5baa270 length 8000002a status 8000002a Sep 11 12:04:08 theleme kernel: 8: @c5baa280 length 8000002a status 8000002a Sep 11 12:04:08 theleme kernel: 9: @c5baa290 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 10: @c5baa2a0 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 11: @c5baa2b0 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 12: @c5baa2c0 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 13: @c5baa2d0 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 14: @c5baa2e0 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: 15: @c5baa2f0 length 800005ea status 800005ea Sep 11 12:04:08 theleme kernel: eth0: Resetting the Tx ring pointer. Rebooting the machine cures it. Sometimes, /etc/init.d/pcmcia stop + start clears the problem, too. Linux version 2.2.17 PCMCIA Card Services 3.1.8 The card is recognized: eth0: 3Com 3CCFE575CT Cyclone CardBus at 0x100, 00:50:04:e9:28:04, IRQ 3 eth0: CardBus functions mapped 60020000->c6066000 8K byte-wide RAM 5:3 Rx:Tx split, MII interface. MII transceiver found at address 0, status 7809. Enabling bus-master transmits and whole-frame receives. eth0: Transmit error, Tx status register 90. cardctl says: Socket 0: product info: "3Com Corporation", "3CCFE575CT", "LAN Cardbus Card", "004" manfid: 0x0101, 0x5257 function: 6 (network)