Comment 20 for bug 347711

Confirmed on Ubuntu 9.04 (Jaunty), running 2.6.28-14-generic, tried kernel noapic option but that did not help. I am running an Intel D945GSEJT Mini-ITX board with Intel Atom N270 and Realtek Gigabit controller, lspci lists it as

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)

This machine functions as a Samba filesharing server. When a user tries to copy large files from the server to their workstation the 'transmit timed out' message typically appears after 1.5-2GB or so, after which the client machine reports the file share is no longer available. It does come back automatically after about 5-20 seconds but file copying runs into the same issue even after this. The network is completely down when this happens, even SSH connections fail during this period.