Kernel oops during movie play with vlc - freeze of screen

[Manuel Widmer]

I have both video and audio over HDMI. In the middle of watching a dvd-movie with vlc the screen froze but audio continued to play via HDMI. Also I was still able to connect with ssh to the linux-pc.

Here is the syslog that was generated:

Jun 22 11:06:12 localhost kernel: [149202.892989] BUG: unable to handle kernel NULL pointer dereference at 0000000000000069
Jun 22 11:06:12 localhost kernel: [149202.893042] IP: [<ffffffff810226fa>] syscall_trace_enter+0x14a/0x280
Jun 22 11:06:12 localhost kernel: [149202.893078] PGD b5a72067 PUD b5a73067 PMD 0
Jun 22 11:06:12 localhost kernel: [149202.893105] Oops: 0000 [#1] SMP
Jun 22 11:06:12 localhost kernel: [149202.893126] Modules linked in: ip6table_mangle ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_filter ip6_tables xt_nat xt_tcpudp xt_state ipt_MASQUERADE xt_LOG xt_limit iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables bnep rfcomm bluetooth arc4 ath9k mac80211 joydev snd_hda_codec_hdmi snd_hda_codec_realtek i915 snd_hda_intel snd_hda_codec ath9k_common snd_hwdep ath9k_hw snd_pcm snd_seq_midi snd_rawmidi ath snd_seq_midi_event snd_seq snd_timer drm_kms_helper snd_seq_device snd cfg80211 drm mxm_wmi gpio_ich video mei_me lpc_ich mac_hid serio_raw mei soundcore snd_page_alloc wmi bonding lp parport ses enclosure hid_generic usbhid hid igb ahci libahci dca i2c_algo_bit r8169 mii ptp pps_core megaraid_sas
Jun 22 11:06:12 localhost kernel: [149202.893720] CPU: 3 PID: 5991 Comm: vlc Not tainted 3.13.0-27-generic #50~precise1-Ubuntu
Jun 22 11:06:12 localhost kernel: [149202.893751] Hardware name: Gigabyte Technology Co., Ltd. Z68X-UD3H-B3/Z68X-UD3H-B3, BIOS F12 03/20/2012
Jun 22 11:06:12 localhost kernel: [149202.893787] task: ffff88020824afe0 ti: ffff88020833a000 task.ti: ffff88020833a000
Jun 22 11:06:12 localhost kernel: [149202.893815] RIP: 0010:[<ffffffff810226fa>] [<ffffffff810226fa>] syscall_trace_enter+0x14a/0x280
Jun 22 11:06:12 localhost kernel: [149202.893851] RSP: 0018:ffff88020833bf08 EFLAGS: 00010246
Jun 22 11:06:12 localhost kernel: [149202.893873] RAX: 00000000000000ca RBX: 00007f605000a728 RCX: 0000000000000089
Jun 22 11:06:12 localhost kernel: [149202.893900] RDX: 00007f605000a72c RSI: 00000000e576e574 RDI: 0000000000000246
Jun 22 11:06:12 localhost kernel: [149202.893926] RBP: ffff88020833bf48 R08: 000000000000507f R09: 00007f6045944d30
Jun 22 11:06:12 localhost kernel: [149202.893953] R10: 00007f6045944d30 R11: 0000000000000001 R12: 00000000000000ca
Jun 22 11:06:12 localhost kernel: [149202.893981] R13: 0000000000000000 R14: ffffffffffffff92 R15: 0000000000000000
Jun 22 11:06:12 localhost kernel: [149202.894009] FS: 00007f6045945700(0000) GS:ffff88021fac0000(0000) knlGS:0000000000000000
Jun 22 11:06:12 localhost kernel: [149202.894039] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 22 11:06:12 localhost kernel: [149202.894062] CR2: 0000000000000069 CR3: 00000000b5a7e000 CR4: 00000000000407e0
Jun 22 11:06:12 localhost kernel: [149202.894088] Stack:
Jun 22 11:06:12 localhost kernel: [149202.894098] ffffffff8102290d 00000000ffffffff 0000000000000000 00007f605000a728
Jun 22 11:06:12 localhost kernel: [149202.894132] 000000000000507f 00007f6045944d30 ffffffffffffff92 0000000000000000
Jun 22 11:06:12 localhost kernel: [149202.894166] 00007f6045944e50 ffffffff81765f1c 0000000000000000 ffffffffffffff92
Jun 22 11:06:12 localhost kernel: [149202.894199] Call Trace:
Jun 22 11:06:12 localhost kernel: [149202.895754] [<ffffffff8102290d>] ? syscall_trace_leave+0xdd/0x150
Jun 22 11:06:12 localhost kernel: [149202.897263] [<ffffffff81765f1c>] tracesys+0x7e/0xe6
Jun 22 11:06:12 localhost kernel: [149202.898739] Code: 00 4c 8b 4b 68 4c 8b 43 60 48 8b 4b 58 48 8b 53 28 0f 85 ef 00 00 00 4d 85 ed 48 c7 c0 ff ff ff ff 75 04 48 8b 43 78 48 8b 5d d8 <4c> 8b 65 e0 4c 8b 6d e8 4c 8b 75 f0 4c 8b 7d f8 c9 c3 0f 1f 40
Jun 22 11:06:12 localhost kernel: [149202.900429] RIP [<ffffffff810226fa>] syscall_trace_enter+0x14a/0x280
Jun 22 11:06:12 localhost kernel: [149202.902030] RSP <ffff88020833bf08>
Jun 22 11:06:12 localhost kernel: [149202.903630] CR2: 0000000000000069
Jun 22 11:06:12 localhost kernel: [149202.914008] ---[ end trace 84ca3afe81b6d89d ]---

After the oops I tried to get to a tty-console (to get rid of the frozen screen) with ctrl-alt-F1 but then also audio playback stopped and I got those syslogs:

Jun 22 11:07:12 localhost pulseaudio[2233]: [alsa-sink] protocol-native.c: Failed to push data into queue
Jun 22 11:07:23 localhost pulseaudio[2233]: [alsa-sink] ratelimit.c: 208 events suppressed
Jun 22 11:07:23 localhost pulseaudio[2233]: [alsa-sink] protocol-native.c: Failed to push data into queue
Jun 22 11:07:34 localhost pulseaudio[2233]: [alsa-sink] ratelimit.c: 209 events suppressed
Jun 22 11:07:34 localhost pulseaudio[2233]: [alsa-sink] protocol-native.c: Failed to push data into queue
Jun 22 11:07:45 localhost pulseaudio[2233]: [alsa-sink] ratelimit.c: 209 events suppressed

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50~precise1
ProcVersionSignature: Ubuntu 3.13.0-27.50~precise1-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Sun Jun 22 12:55:24 2014
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-lts-trusty
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[penalvch (penalvch)]

Manuel Widmer, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1332940

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]