On Mon, 4 Sep 2017 13:59:48 -0400, Frank DiPrete wrote: > What us the NIC in the laptop ? > I've had this problem before using the open source driver for a network > adapter. > (trying to remember which one)
But this appears to also happen over the loopback interface. > -----Original Message----- > From: Discuss [mailto:discuss-bounces+fdiprete=comcast....@blu.org] On > Behalf Of Robert Krawitz > Sent: Monday, September 04, 2017 1:12 PM > To: discuss@blu.org > Subject: [Discuss] Linux on Lenovo P70 -- data corruption > > I'm about at my wit's end here. > > I bought a Lenovo P70 on eBay to run Linux on. But I'm finding some data > corruption on network data transfers (e. g. scp, ftp, socat). > The oddity is that in the received files the bytes that are bad always have > 011111 in the low 6 bits of their address. There's some clustering, but not > tight clustering and not at regular intervals. > > rsync sometimes reports protocol failures (in either direction -- from this > machine to something else or from another system to this). The other system > is good. scp/ssh don't report any such problems. > > It appears that this is more severe under heavy traffic, and perhaps under > heavy load too. > > Unfortunately, I'm not able (yet) to reproduce this under Windows using > either ftp or scp, with various background loads. The addresses in suggest > that something's going wrong with writing the data out to disk (particularly > with scp, I'd expect errors to propagate with encryption or to get outright > protocol failures), but the protocol failures with rsync suggest that it's > somewhere else. > > I get no problems with either memtest86 or Lenovo diags, and prime95 also > isn't reporting any issues. This happens under both Knoppix > 7.7.1 and openSUSE 42.3, the latter with any of the stock kernel, the > 4.12.9+SUSE kernel, or the 4.12.9 vanilla kernel. > > If I can reproduce the problem under Windows, the seller will refund me in > full and send it back to Lenovo. If I can't, at best I'll have to pay a 15% > restocking fee on a not-inexpensive system. If I try to send it to Lenovo > under warranty, I expect I'll get an NPF and just waste a lot of time and > yet another shipping fee. > > The system has a Xeon E3-1505Mv5, nVidia M4000M (doesn't matter if X is > running or not), 32 GB RAM (yes, I've tried each of the two DIMMs > separately, in different slots), 4K display, two separate eSATA M.2 SSD's. > The BIOS is up to date with the hyperthreading fix, and in any event it > happens even if I turn hyperthreading off. Right now it's an expensive > white elephant. > > Any thoughts? -- Robert Krawitz <r...@alum.mit.edu> *** MIT Engineers A Proud Tradition http://mitathletics.com *** Member of the League for Programming Freedom -- http://ProgFree.org Project lead for Gutenprint -- http://gimp-print.sourceforge.net "Linux doesn't dictate how I work, I dictate how Linux works." --Eric Crampton _______________________________________________ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
