kernel-packages team mailing list archive

[Theodore Ts'o <tytso@xxxxxxx>]

I tried applying the two patches which you posted on intel-gfx[1],
ported to 3.13.

[1]
http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/33737

Using a T540p and an Ultradock, connected to a Dell U2410 via a
DisplayPort cable --- and it worked!  Not only were there no hangs, but
in fact I could enable and disable the external display.  The "too many
retries" did indeed trigger:

[    4.152360] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5
...
[    4.245174] fbcon: inteldrmfb (fb0) is primary device
...
[    5.952436] [drm:intel_dp_aux_native_write] *ERROR* too many retries, giving up
[    6.004766] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[    6.129836] Console: switching to colour frame buffer device 240x75
[    6.134854] i915 0000:00:02.0: fb0: inteldrmfb frame buffer 
[    6.134856] i915 0000:00:02.0: registered panic notifier
[    6.275753] ACPI: Video Device [VID] (multi-head: yes  rom: no  post: no)
[    6.276089] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input11
[    6.276620] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[    6.277149] snd_hda_intel 0000:00:03.0: irq 46 for MSI/MSI-Xdevice

When I tried disabling the external monitor, undocking, and redocking,
and then tried enabled the external monitor again, the too many retries
did trigger again:

[ 1066.879571] drm: not enough stolen space for compressed buffer (need 33554432 more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.
[ 1070.884851] [drm:intel_dp_aux_native_write] *ERROR* too many retries, giving up

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https://bugs.launchpad.net/bugs/1275794

Title:
  Lenovo T440s freezes when connected to docking station

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  This bug report looks to be for the same issue:
  https://bugs.freedesktop.org/show_bug.cgi?id=71267

  I came across the above bug report here:
  https://bbs.archlinux.org/viewtopic.php?pid=1374408

  I'm running with a Thinkpad T440s and ultra dock with hdmi<->hdmi.  In
  my case if I dock when hdmi is connected to the dock, the mouse and
  keyboard freeze once connected.  When I undock they unfreeze.  If I
  dock when hdmi is not connected to the dock, the mouse and keyboard
  don't freeze.

  Ubuntu release: 14.04 Trusty Tahr (development branch)
  --- 
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  corey      2385 F.... pulseaudio
   /dev/snd/controlC0:  corey      2385 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=12d1435c-d652-4aab-8da6-3b043f3da722
  InstallationDate: Installed on 2014-01-31 (3 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130)
  MachineType: LENOVO 20AQCTO1WW
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-5-generic.efi.signed root=UUID=d17999de-2672-48e5-b628-403d311d3251 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-5-generic N/A
   linux-backports-modules-3.13.0-5-generic  N/A
   linux-firmware                            1.123
  Tags:  trusty
  Uname: Linux 3.13.0-5-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip kvm libvirtd lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/10/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET67WW (2.17 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98405 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET67WW(2.17):bd12/10/2013:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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