一台N年前的台式机，安装的红帽5.5,启动系统后，报错如下，并且ping不通网关。

messages:

Jun 21 22:05:32 NQ kernel: NETDEV WATCHDOG: eth0: transmit timed out
Jun 21 22:05:32 NQ kernel: eth0: Transmit timed out, status 0003, PHY status 786d, resetting…
Jun 21 22:05:32 NQ kernel: eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Jun 21 22:05:36 NQ kernel: NETDEV WATCHDOG: eth0: transmit timed out
Jun 21 22:05:36 NQ kernel: eth0: Transmit timed out, status 0002, PHY status 786d, resetting…
Jun 21 22:05:36 NQ kernel: eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Jun 21 22:05:40 NQ kernel: NETDEV WATCHDOG: eth0: transmit timed out
Jun 21 22:05:40 NQ kernel: eth0: Transmit timed out, status 0003, PHY status 786d, resetting…
Jun 21 22:05:40 NQ kernel: eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Jun 21 22:05:44 NQ kernel: NETDEV WATCHDOG: eth0: transmit timed out
Jun 21 22:05:44 NQ kernel: eth0: Transmit timed out, status 0003, PHY status 786d, resetting…
Jun 21 22:05:44 NQ kernel: eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Jun 21 22:06:22 NQ nm-system-settings:    ifcfg-rh: removed /etc/sysconfig/network-scripts/ifcfg-eth0.

解决办法：

修改grup.conf

在kernel部分后面追加一句； acpi=off noapic

重启解决。