Hardware
IBM ThinkPad T42
E1000 card info:
02:01.0 Ethernet controller: Intel Corporation 82540EP Gigabit Ethernet
Controller (Mobile) (rev 03)
Subsystem: IBM PRO/1000 MT Mobile Connection
Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 9
Memory at c0220000 (32-bit, non-prefetchable) [size=128K]
Memory at c0200000 (32-bit, non-prefetchable) [size=64K]
I/O ports at 8000 [size=64]
[virtual] Expansion ROM at ec000000 [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Steps to reproduce:
1) Suspend to disk normally
2) Resume from disk, the e1000 will show garbage for network statistics.
<snip>
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:83 errors:4294967254 dropped:4294967289 overruns:0
frame:4294967268
TX packets:76 errors:4294967282 dropped:0 overruns:0
carrier:4294967275
collisions:4294967289 txqueuelen:100
RX bytes:50728 (49.5 KiB) TX bytes:10138 (9.9 KiB)
Base address:0x8000 Memory:c0220000-c0240000
Did something change in the driver that forgot to save the registers / not
register back upon resumption from disk? I can't tell from the code how the
driver knows its been brought down to S3 or S4 states.
A workaround is to then suspend to memory and resume, the e1000 will work
again. This is repeatable each time.
Not sure if anyone else noticed this.
Thanks,
Shawn.
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