On Thu, 2010-05-27 at 18:41 +0900, Bruno Randolf wrote:
> On Thursday 27 May 2010 17:02:12 Roman Yepishev wrote:
> > I've been following this thread closely for some time as I have exactly
> > the same experience with my Acer Aspire One (AR5001 card):
> 
> it strikes me that in both cases it happens on an Acer...
> 
> > 03:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless
> > Network Adapter (rev 01) Subsystem: Foxconn International, Inc. Device
> > e008
> >     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
> 
> could you use the output of dmesg to identify the exact atheros chipset? 
> something like "ath5k phy0: Atheros AR5414 chip found (MAC: 0xa5, PHY: 
> 0x61)". 
> thanks.
Faulty card:
[   20.530246] ath5k phy0: Atheros AR2425 chip found (MAC: 0xe2, PHY:
0x70)
Normal card:
[   18.352797] ath5k phy0: Atheros AR2425 chip found (MAC: 0xe2, PHY:
0x70)

Hm... It looks like they should be completely equal.
More info from Aspire One
 * full lspci http://pastebin.com/8i4pFswp
 * dmesg: http://pastebin.com/iWQSyTtG

> hmm, with WPA enabled you will not be able to match bitpatterns...
True

> > Currently it looks like something
> > card/vendor/revision specific thing as I have tested broadcom bc43-based
> > cards and two atheros (AMBIT Microsysystem / 0428) cards in the same
> > environment w/o any issues.
> 
> so that means the other atheros cards in the acer don't have this problem, 
> right? again please tell us the exact chipset.
I have Acer Aspire 5520, Acer Aspire 5103 and Acer Aspire One (A150).
All laptops tell me that they have Atheros AR2425 chip found (MAC: 0xe2,
PHY: 0x70)

> any chance to test the problematic card in another laptop to see if it 
> depends 
> on the card or the laptop/card combination?
Will try to check that if I find out how to disassemble that aspire
one :)

> how easy is it for you to reproduce the problem? do you know any kernel 
> version where this problem didn't happen?
Reproducible - nearly always. But I could not reproduce it with hundreds
of megabytes of the file with 'U' character as well as repetitive bytes
of 0x0-0xff. However I have transferred 170Mb of video file just now and
got a lot of "mismatching" blocks.

Unfortunately i noticed the problem only recently (a month ago or so),
usually this netbook was connected via the cable for faster transfers or
USB GPRS/EDGE modem.


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