This crash was with the kernel from comment #6 and caused the system to freeze.

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
Date: Wed Aug 28 14:26:12 2013
Failure: oops
OopsText:
 BUG: unable to handle kernel NULL pointer dereference at 00000000000003b0
 IP: [<ffffffff815789c1>] evdev_poll+0x31/0x70
 PGD 0 
 Oops: 0000 [#1] SMP 
 Modules linked in: hid_magicmouse hidp hid cuse dm_crypt parport_pc ppdev autofs4 nfsd auth_rpcgss nfs_acl rfcomm nfs bnep lockd sunrpc fscache binfmt_misc intel_powerclamp coretemp kvm_intel kvm crc32_pclmul arc4 ghash_clmulni_intel iwldvm aesni_intel mac80211 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi joydev snd_hda_codec_conexant snd_hda_intel snd_hda_codec btusb snd_hwdep snd_pcm thinkpad_acpi nvram snd_page_alloc snd_seq_midi snd_seq_midi_event bluetooth snd_rawmidi snd_seq iwlwifi snd_seq_device snd_timer lpc_ich microcode mei_me psmouse snd serport serio_raw mei soundcore wacom_w8001 intel_ips cfg80211 lp tpm_tis parport mac_hid btrfs xor zlib_deflate raid6_pq libcrc32c i915 e1000e i2c_algo_bit drm_kms_helper ahci libahci ptp drm pps_core wmi video
 CPU: 1 PID: 1277 Comm: Xorg Not tainted 3.11.0-031100rc4-generic #201308041735
 Hardware name: LENOVO 0831CTO/0831CTO, BIOS 6QET53WW (1.23 ) 09/15/2010
 task: ffff88006395ddc0 ti: ffff880060d0c000 task.ti: ffff880060d0c000
 RIP: 0010:[<ffffffff815789c1>]  [<ffffffff815789c1>] evdev_poll+0x31/0x70
 RSP: 0018:ffff880060d0d9a8  EFLAGS: 00010246
 RAX: 0000000000000000 RBX: ffff880035921800 RCX: 0000000000000050
 RDX: 0000000000000001 RSI: ffff880060d0dab8 RDI: ffff880060e39100
 RBP: ffff880060d0d9b8 R08: ffff880060e39138 R09: ffff880060d0ddb8
 R10: 0000000000000000 R11: 0000000000003246 R12: 0000000000000000
 R13: 0000000000002000 R14: 00080000001fe000 R15: ffff880060e39100
 FS:  00007fead9936980(0000) GS:ffff880077080000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 00000000000003b0 CR3: 0000000060ccb000 CR4: 00000000000007e0
 Stack:
  0000000000000040 000000000000000d ffff880060d0dd68 ffffffff811c572e
  0000000000000000 0000000000000000 0000000000000304 0000000000000001
  ffff880060d0dfd8 0000000000000000 0000000000000000 ffff880060d0df28
 Call Trace:
  [<ffffffff811c572e>] do_select+0x31e/0x6f0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff811c4e40>] ? __pollwait+0xf0/0xf0
  [<ffffffff81199221>] ? kmem_cache_free+0x121/0x180
  [<ffffffff81074bed>] ? __sigqueue_free+0x3d/0x50
  [<ffffffff811c5cbd>] core_sys_select+0x1bd/0x2f0
  [<ffffffff81078775>] ? set_current_blocked+0x15/0x20
  [<ffffffff810787da>] ? signal_delivered+0x5a/0x70
  [<ffffffff8110bb5c>] ? acct_account_cputime+0x1c/0x20
  [<ffffffff8109ca76>] ? account_user_time+0xa6/0xc0
  [<ffffffff811c603c>] SyS_select+0xbc/0x100
  [<ffffffff817331af>] tracesys+0xe1/0xe6
 Code: 48 89 e5 48 83 ec 10 48 85 f6 48 89 5d f0 48 8b 9f a8 00 00 00 4c 89 65 f8 4c 8b 63 18 74 0c 4c 89 e1 48 8b 06 48 83 c1 50 75 2f <41> 80 bc 24 b0 03 00 00 01 8b 4b 04 4c 8b 65 f8 19 c0 24 14 05 
 RIP  [<ffffffff815789c1>] evdev_poll+0x31/0x70
  RSP <ffff880060d0d9a8>
 CR2: 00000000000003b0
 ---[ end trace 3a36cd33a55bf681 ]---
 
Package: linux-image-3.11.0-031100rc4-generic
SourcePackage: linux
Tags: kernel-oops
ApportVersion: 2.12.1-0ubuntu2
Architecture: amd64
CheckboxSubmission: 2e6ecd139611830c78226ad04ff4c093
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.10
EcryptfsInUse: Yes
InstallationDate: Installed on 2010-11-17 (1014 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
PackageArchitecture: amd64
Title: BUG: unable to handle kernel NULL pointer dereference at 00000000000003b0
Uname: Linux 3.11.0-031100rc4-generic x86_64
UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again.
UpgradeStatus: Upgraded to saucy on 2013-06-04 (85 days ago)