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[Bug 814894] Re: [Fit-PC2i] Kernel hangs on high network throughput


*** This bug is a duplicate of bug 1210092 ***

** This bug has been marked a duplicate of private bug 1210092

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  [Fit-PC2i] Kernel hangs on high network throughput

Status in “linux” package in Ubuntu:

Bug description:
  If A Fit-PC2i receives more than 200Mbit/s of network traffic the
  kernel will hang. Cursor stops blinking, machine doesn't respond to
  keyboard and mouse input, no longer responds to ARP requests or any
  other network traffic.

  The problem is triggered every time a 10.04.3 system with kernel
  version 2.6.32-33-generic receives more than 200Mbit/s of network
  traffic. The bug affects both live system as well as fully installed

  The bug can be reproduced by downloading a 1GB file from a server on
  the LAN. The bug is only triggered if more than 200Mbit/s is
  transfered. If any link on the path between client and server is
  100Mbit/s or less the bug cannot be reproduced.

  The 8.04.4 live system is not affected by this problem and can receive
  600Mbit/s without problems on the same hardware.

  Marking this as a security problem because it can in principle be used
  to perform a DoS attack.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: linux-image (not installed)
  Regression: Yes
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.32-33.70-generic
  Uname: Linux 2.6.32-33-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: i386
   **** List of CAPTURE Hardware Devices ****
   card 0: MID [HDA Intel MID], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  kasperd    1453 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
   Card hw:0 'MID'/'HDA Intel MID at 0xb0050000 irq 22'
     Mixer name	: 'Realtek ALC662 rev1'
     Components	: 'HDA:10ec0662,10ec0662,00100101'
     Controls      : 33
     Simple ctrls  : 19
  Date: Sat Jul 23 01:43:06 2011
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=e14584e1-caed-4150-9e25-e364d27bebe3
  InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release i386 (20110720.1)
  MachineType: CompuLab CM-iAM/SBC-FITPC2i
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-33-generic root=UUID=8bf29c49-594d-41b8-8513-ac3cf4bf4e1b ro rootdir=lucid
  RelatedPackageVersions: linux-firmware 1.34.7
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  StagingDrivers: rt2870sta
  Title: [STAGING]
  dmi.bios.date: 09/14/2010
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: NAPA0001.86C.0000.D.1009141059
  dmi.board.name: CM-iAM/SBC-FITPC2i
  dmi.board.vendor: Intel Corporation
  dmi.board.version: 1.x
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: OEM
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrNAPA0001.86C.0000.D.1009141059:bd09/14/2010:svnCompuLab:pnCM-iAM/SBC-FITPC2i:pvrNotApplicable:rvnIntelCorporation:rnCM-iAM/SBC-FITPC2i:rvr1.x:cvnOEM:ct1:cvrN/A:
  dmi.product.name: CM-iAM/SBC-FITPC2i
  dmi.product.version: Not Applicable
  dmi.sys.vendor: CompuLab

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