With new kernel from trusty and raring I get this:
[ 1101.004258] e1000e 0000:00:19.0 eth0: Detected Hardware Unit Hang:
[ 1101.004258] TDH <28>
[ 1101.004258] TDT <44>
[ 1101.004258] next_to_use <44>
[ 1101.004258] next_to_clean <28>
[ 1101.004258] buffer_info[next_to_clean]:
[ 1101.004258] time_stamp <308ce>
[ 1101.004258] next_to_watch <2a>
[ 1101.004258] jiffies <30e3b>
[ 1101.004258] next_to_watch.status <0>
[ 1101.004258] MAC Status <80083>
[ 1101.004258] PHY Status <796d>
[ 1101.004258] PHY 1000BASE-T Status <3800>
[ 1101.004258] PHY Extended Status <3000>
[ 1101.004258] PCI Status <10>
[ 1102.016013] ------------[ cut here ]------------
[ 1102.016028] WARNING: CPU: 0 PID: 0 at /build/buildd/linux-lts-trusty-3.13.0/net/sched/sch_generic.c:264 dev_watchdog+0x1fa/0x210()
[ 1102.016036] NETDEV WATCHDOG: eth0 (e1000e): transmit queue 0 timed out
[ 1102.016039] Modules linked in: xt_nat xt_multiport xt_TCPMSS xt_state xt_REDIRECT xt_mac xt_tcpudp ipt_MASQUERADE iptable_mangle iptable_nat nf_nat_ipv4 iptable_filter nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_proto_gre nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables pppoe pppox snd_hda_codec_realtek i915 drm_kms_helper snd_hda_intel snd_hda_codec drm snd_hwdep snd_pcm gpio_ich i2c_algo_bit snd_timer ppdev snd mei_me video soundcore parport_pc mei snd_page_alloc lpc_ich serio_raw mac_hid lp parport raid10 raid456 async_raid6_recov async_pq pata_acpi hid_generic 8139too e1000e usbhid ptp raid6_pq ahci r8169 async_xor 8139cp hid libahci pata_jmicron mii xor pps_core async_memcpy async_tx raid1 raid0 multipath linear
[ 1102.016125] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0-32-generic #57~precise1-Ubuntu
[ 1102.016128] Hardware name: Gigabyte Technology Co., Ltd. EQ45M-S2/EQ45M-S2, BIOS FEb 07/29/2010
[ 1102.016131] 00000000 00000000 f300bea4 c1680147 c190e584 f300bed4 c1059b14 c190e548
[ 1102.016139] f300bf00 00000000 c190e584 00000108 c15b502a c15b502a f64b0000 00000000
[ 1102.016147] fffcf5aa f300beec c1059bd3 00000009 f300bee4 c190e548 f300bf00 f300bf28
[ 1102.016155] Call Trace:
[ 1102.016162] [<c1680147>] dump_stack+0x41/0x52
[ 1102.016168] [<c1059b14>] warn_slowpath_common+0x84/0xa0
[ 1102.016173] [<c15b502a>] ? dev_watchdog+0x1fa/0x210
[ 1102.016177] [<c15b502a>] ? dev_watchdog+0x1fa/0x210
[ 1102.016182] [<c1059bd3>] warn_slowpath_fmt+0x33/0x40
[ 1102.016186] [<c15b502a>] dev_watchdog+0x1fa/0x210
[ 1102.016194] [<c1065770>] call_timer_fn+0x30/0x110
[ 1102.016199] [<c15b4e30>] ? pfifo_fast_dequeue+0xe0/0xe0
[ 1102.016203] [<c106687c>] run_timer_softirq+0x20c/0x270
[ 1102.016208] [<c15b4e30>] ? pfifo_fast_dequeue+0xe0/0xe0
[ 1102.016213] [<c105e4f0>] ? perf_trace_irq_handler_entry+0x120/0x120
[ 1102.016218] [<c105e4f0>] ? perf_trace_irq_handler_entry+0x120/0x120
[ 1102.016223] [<c105e59a>] __do_softirq+0xaa/0x230
[ 1102.016227] [<c105e4f0>] ? perf_trace_irq_handler_entry+0x120/0x120
[ 1102.016230] <IRQ> [<c105e9b6>] ? irq_exit+0x76/0xa0
[ 1102.016237] [<c169327b>] ? do_IRQ+0x4b/0xc0
[ 1102.016242] [<c107be4e>] ? hrtimer_reprogram.isra.21+0x8e/0xe0
[ 1102.016247] [<c1693033>] ? common_interrupt+0x33/0x38
[ 1102.016253] [<c15500e0>] ? pentium4_get_frequency+0x30/0xd0
[ 1102.016258] [<c10488a5>] ? native_safe_halt+0x5/0x10
[ 1102.016264] [<c13b01b8>] ? arch_safe_halt+0x8/0xb
[ 1102.016268] [<c13b0acd>] ? acpi_safe_halt+0x1b/0x23
[ 1102.016272] [<c13b0af1>] ? acpi_idle_do_entry+0x1c/0x2b
[ 1102.016276] [<c13b0bd2>] ? acpi_idle_enter_c1+0x50/0x69
[ 1102.016280] [<c15531f9>] ? cpuidle_enter_state+0x39/0x100
[ 1102.016285] [<c1553357>] ? cpuidle_idle_call+0x97/0x1d0
[ 1102.016290] [<c10188bd>] ? arch_cpu_idle+0xd/0x30
[ 1102.016295] [<c10aa892>] ? cpu_idle_loop+0x52/0x240
[ 1102.016299] [<c10aaa99>] ? cpu_startup_entry+0x19/0x60
[ 1102.016304] [<c10aaade>] ? cpu_startup_entry+0x5e/0x60
[ 1102.016308] [<c1670a62>] ? rest_init+0x62/0x70
[ 1102.016314] [<c19fbb0f>] ? start_kernel+0x34a/0x350
[ 1102.016318] [<c19fb677>] ? repair_env_string+0x51/0x51
[ 1102.016323] [<c19fb39e>] ? i386_start_kernel+0x139/0x13c
[ 1102.016325] ---[ end trace 331c32f8d9ee8bdb ]---
[ 1102.016547] e1000e 0000:00:19.0 eth0: Reset adapter unexpectedly
[ 1105.356869] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
and the network interface interrupts connection.
a workaround is to run
ethtool -K eth0 tso off
ethtool -K eth0 gso off
in /etc/rc.local
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.13.0-32-generic 3.13.0-32.57~precise1
ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic i686
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Tue Jul 22 11:39:39 2014
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release i386 (20120424.1)
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: linux-lts-trusty
UpgradeStatus: No upgrade log present (probably fresh install)
Status changed to 'Confirmed' because the bug affects multiple users.