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Re: [Bug 1176577] Re: [HP Compaq dc7700 Small Form Factor PC] mei unexpected reset in kernel 3.8


Il 10/08/2014 12:01, Alexander Usyskin ha scritto:
> [   25.216133] mei_me 0000:00:03.0: timer: connect/disconnect timeout.
> [   25.216143] mei_me 0000:00:03.0: unexpected reset: dev_state = ENABLED
> Ok, dmesg looks good from mei driver point of view. Do you have network slowdown (or other problems that manifests with 3.8) with this kernel?

 From time to time, big file copy (hundreds of MB) hang, but it's a rare 
event. For testing I've just copied a couple of files for a total of 3.5 
GB with some speed issues. Speed was > 10 MB/s over a 100 mbps ethernet 
for the major part of the transfer, then dropped down to 5 MB/s after ~2 
GB (only for the bigger of the two files). I didn't investigate about 
possible roles of the LAN switch, though.

> The resetting message as you have in log usually means that is some is wrong with FW/HW - mei driver not receiving reply in timely manner.
> To debug it future, you can enable dynamic debug for mei driver :
> echo -n 'module mei +lfp' > /sys/kernel/debug/dynamic_debug/control
> echo -n 'module mei_me +lfp' > /sys/kernel/debug/dynamic_debug/control
> and wait for next reset

Thanks for the info. Once I enable debug, what should I look for?

Thank you.

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  [HP Compaq dc7700 Small Form Factor PC] mei unexpected reset in kernel

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Bug description:
  Right after upgrading kernel from 3.5 to 3.8 (Ubuntu 13.04), the
  syslog got flooded by a large number of such messages:

  May  5 15:33:15 compaq-aldo kernel: [  205.064042] mei 0000:00:03.0: unexpected reset: dev_state = RESETING
  May  5 15:33:21 compaq-aldo kernel: [  211.076029] mei 0000:00:03.0: unexpected reset: dev_state = RESETING
  May  5 15:33:27 compaq-aldo kernel: [  217.088035] mei 0000:00:03.0: unexpected reset: dev_state = RESETING
  May  5 15:33:33 compaq-aldo kernel: [  223.100039] mei 0000:00:03.0: unexpected reset: dev_state = RESETING
  May  5 15:33:39 compaq-aldo kernel: [  229.112045] mei 0000:00:03.0: unexpected reset: dev_state = RESETING

  This was associated by non reliable ethernet functionality, i.e.
  transfer of large files from my Ubuntu box to a local NAS connected
  via ethernet got hanging with no other apparent errors or diagnostics:
  nautilus copy just stopped transferring data, leaving the copy window
  there with the progress bar stopped.

  I tried to reboot, but this behaviour is perfectly reproducible.

  This is one of the first syslog lines got from that kernel:

  May  5 15:30:15 compaq-aldo kernel: [    0.000000] Linux version
  3.8.0-19-generic (buildd@roseapple) (gcc version 4.7.3 (Ubuntu/Linaro
  4.7.3-1ubuntu1) ) #30-Ubuntu SMP Wed May 1 16:36:13 UTC 2013 (Ubuntu
  3.8.0-19.30-generic 3.8.8)

  I attach the whole syslog from boot of that kernel.

  On the same box, launching a previsous kernel (3.5) works flawlessly.
  For the time being, I removed 3.8 kernel from my box, now running 3.5.

  Kind regards
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: i386
   /dev/snd/controlC1:  ldx        2074 F.... pulseaudio
   /dev/snd/controlC0:  ldx        2074 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=32cc5d6d-43c1-4e97-a8b7-10b71aac3e29
  InstallationDate: Installed on 2013-01-04 (121 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
   lo        no wireless extensions.
   eth0      no wireless extensions.
  MachineType: Hewlett-Packard HP Compaq dc7700 Small Form Factor
  MarkForUpload: True
  Package: linux (not installed)
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=38ce1d51-c3cf-438d-b395-f7c4744e2e37 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  Tags:  raring
  Uname: Linux 3.8.0-19-generic i686
  UpgradeStatus: Upgraded to raring on 2013-04-26 (9 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo wireshark
  dmi.bios.date: 04/13/2007
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786E1 v01.10
  dmi.board.name: 0A54h
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CZC7451V4Q
  dmi.chassis.type: 4
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786E1v01.10:bd04/13/2007:svnHewlett-Packard:pnHPCompaqdc7700SmallFormFactor:pvr:rvnHewlett-Packard:rn0A54h:rvr:cvnHewlett-Packard:ct4:cvr:
  dmi.product.name: HP Compaq dc7700 Small Form Factor
  dmi.sys.vendor: Hewlett-Packard

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