kernel booting hangs on Lenovo M5400 & B5400

Patches are submitted to kernel-team mail list.

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-raring' to 'verification-done-raring'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

verified with 3.8.0-35-generic, boot successfully

This bug was fixed in the package linux - 3.8.0-35.50

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linux (3.8.0-35.50) raring; urgency=low

  [Steve Conklin]

  * Release Tracking Bug
    - LP: #1257102

  [ Andy Whitcroft ]

  * [Config] CONFIG_DEBUG_BUGVERBOSE=y
    - LP: #1252353

  [ Kamal Mostafa ]

  * SAUCE: (no-up) drm/i915: i915.disable_pch_pwm overrides PCH_PWM_ENABLE
    quirk
    - LP: #1163720

  [ Upstream Kernel Changes ]

  * PCI: Allow PCIe Capability link-related register access for switches
    - LP: #1252987
  * PCI: Remove PCIe Capability version checks
    - LP: #1252987
  * PCI: Support PCIe Capability Slot registers only for ports with slots
    - LP: #1252987
  * ACPICA: Interpreter: Fix Store() when implicit conversion is not
    possible.
    - LP: #1257026
  * ACPICA: DeRefOf operator: Update to fully resolve FieldUnit and
    BufferField refs.
    - LP: #1257026
  * ACPICA: Return error if DerefOf resolves to a null package element.
    - LP: #1257026
  * ACPICA: Fix for a Store->ArgX when ArgX contains a reference to a
    field.
    - LP: #1257026
  * vxlan: fix ip_select_ident skb parameter
    - LP: #1257026
  * tcp: TSO packets automatic sizing
    - LP: #1257026
  * tcp: TSQ can use a dynamic limit
    - LP: #1257026
  * net: Add skb_unclone() helper function.
    - LP: #1257026
  * ipv6: fix warning in xfrm6_mode_tunnel_input
    - LP: #1257026
  * ip: fix warning in xfrm4_mode_tunnel_input
    - LP: #1257026
  * tcp: must unclone packets before mangling them
    - LP: #1257026
  * tcp: do not forget FIN in tcp_shifted_skb()
    - LP: #1257026
  * net: do not call sock_put() on TIMEWAIT sockets
    - LP: #1257026
  * l2tp: fix kernel panic when using IPv4-mapped IPv6 addresses
    - LP: #1257026
  * l2tp: Fix build warning with ipv6 disabled.
    - LP: #1257026
  * net: mv643xx_eth: update statistics timer from timer context only
    - LP: #1257026
  * net: mv643xx_eth: fix orphaned statistics timer crash
    - LP: #1257026
  * net: heap overflow in __audit_sockaddr()
    - LP: #1257026
  * proc connector: fix info leaks
    - LP: #1257026
  * ipv4: fix ineffective source address selection
    - LP: #1257026
  * can: dev: fix nlmsg size calculation in can_get_size()
    - LP: #1257026
  * net: secure_seq: Fix warning when CONFIG_IPV6 and CONFIG_INET are not
    selected
    - LP: #1257026
  * xen-netback: Don't destroy the netdev until the vif is shut down
    - LP: #1257026
  * net: vlan: fix nlmsg size calculation in vlan_get_size()
    - LP: #1257026
  * vti: get rid of nf mark rule in prerouting
    - LP: #1257026
  * l2tp: must disable bh before calling l2tp_xmit_skb()
    - LP: #1257026
  * farsync: fix info leak in ioctl
    - LP: #1257026
  * unix_diag: fix info leak
    - LP: #1257026
  * connector: use nlmsg_len() to check message length
    - LP: #1257026
  * virtio-net: don't respond to cpu hotplug notifier if we're not ready
    - LP: #1257026
  * bridge: Correctly clamp MAX forward_delay when enabling STP
    - LP: #1257026
  * net: dst: provide accessor function to dst->xfrm
    - LP: #1257026
  * sctp: Use software crc32 checksum when xfrm transform will happen.
    - LP: #1257026
  * sctp: Perform software checksum if...