Hi,

suspend to ram, after resume, I got below info: (attached the full dmesg)

[106900.343520] e1000e 0000:00:19.0: eth0: Detected Hardware Unit Hang:
[106900.343521]   TDH                  <1>
[106900.343522]   TDT                  <2>
[106900.343523]   next_to_use          <2>
[106900.343523]   next_to_clean        <1>
[106900.343524] buffer_info[next_to_clean]:
[106900.343525]   time_stamp           <101e7f773>
[106900.343526]   next_to_watch        <1>
[106900.343526]   jiffies              <101e7fa4a>
[106900.343527]   next_to_watch.status <0>
[106900.343528] MAC Status             <80683>
[106900.343529] PHY Status             <796d>
[106900.343529] PHY 1000BASE-T Status  <3800>
[106900.343530] PHY Extended Status    <3000>
[106900.343531] PCI Status             <10>
[106902.342904] e1000e 0000:00:19.0: eth0: Detected Hardware Unit Hang:
[106902.342905]   TDH                  <1>
[106902.342906]   TDT                  <2>
[106902.342907]   next_to_use          <2>
[106902.342907]   next_to_clean        <1>
[106902.342908] buffer_info[next_to_clean]:
[106902.342909]   time_stamp           <101e7f773>
[106902.342909]   next_to_watch        <1>
[106902.342910]   jiffies              <101e7fca2>
[106902.342911]   next_to_watch.status <0>
[106902.342912] MAC Status             <80683>
[106902.342912] PHY Status             <796d>
[106902.342913] PHY 1000BASE-T Status  <3800>
[106902.342914] PHY Extended Status    <3000>
[106902.342915] PCI Status             <10>
[106903.349326] ------------[ cut here ]------------
[106903.349336] WARNING: at net/sched/sch_generic.c:255
dev_watchdog+0xeb/0x14b()
[106903.349339] Hardware name: OptiPlex 760
[106903.349342] NETDEV WATCHDOG: eth0 (e1000e): transmit queue 0 timed out
[106903.349344] Modules linked in: cdc_ether usbnet mii tun kvm_intel
kvm snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device
snd_pcm_oss snd_mixer_oss fuse snd_hda_codec_analog snd_hda_intel
snd_hda_codec snd_hwdep snd_pcm radeon snd_timer snd_page_alloc ttm
dell_wmi sparse_keymap wmi
[106903.349379] Pid: 0, comm: swapper Not tainted 3.1.0-rc6+ #202
[106903.349382] Call Trace:
[106903.349384]  <IRQ>  [<ffffffff8103c5a7>] warn_slowpath_common+0x80/0x98
[106903.349394]  [<ffffffff8103c653>] warn_slowpath_fmt+0x41/0x43
[106903.349399]  [<ffffffff81560149>] dev_watchdog+0xeb/0x14b
[106903.349404]  [<ffffffff810497c6>] run_timer_softirq+0x217/0x300
[106903.349408]  [<ffffffff81049733>] ? run_timer_softirq+0x184/0x300
[106903.349413]  [<ffffffff8156005e>] ? netif_tx_unlock+0x51/0x51
[106903.349419]  [<ffffffff810423c6>] __do_softirq+0xe2/0x1bc
[106903.349424]  [<ffffffff81007a81>] ? paravirt_read_tsc+0x9/0xd
[106903.349428]  [<ffffffff81007fc8>] ? sched_clock+0x9/0xd
[106903.349434]  [<ffffffff8160063c>] call_softirq+0x1c/0x30
[106903.349438]  [<ffffffff81003ba2>] do_softirq+0x46/0x9c
[106903.349442]  [<ffffffff81042696>] irq_exit+0x5b/0xbe
[106903.349446]  [<ffffffff8100384a>] do_IRQ+0x89/0xa0
[106903.349452]  [<ffffffff815f8e33>] common_interrupt+0x73/0x73
[106903.349454]  <EOI>  [<ffffffff81008d81>] ? mwait_idle+0x8a/0xc1
[106903.349462]  [<ffffffff81008d78>] ? mwait_idle+0x81/0xc1
[106903.349467]  [<ffffffff810012ab>] cpu_idle+0xb3/0xd5
[106903.349473]  [<ffffffff815d8dbe>] rest_init+0xb2/0xb9
[106903.349477]  [<ffffffff815d8d0c>] ?
csum_partial_copy_generic+0x16c/0x16c
[106903.349483]  [<ffffffff81a22b49>] start_kernel+0x390/0x39b
[106903.349487]  [<ffffffff81a222af>] x86_64_start_reservations+0xb6/0xba
[106903.349491]  [<ffffffff81a223b4>] x86_64_start_kernel+0x101/0x110
[106903.349495] ---[ end trace 1d36d9ed335e092c ]---
[106903.349722] e1000e 0000:00:19.0: eth0: Reset adapter

-- 
Thanks
Dave