This bug is missing log files that will aid in diagnosing the problem. >From a terminal window please run:
apport-collect 1647048 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1647048 Title: System freezes after login Status in linux package in Ubuntu: Incomplete Bug description: Hi, Since I updated to kubuntu 16.10 I quite often have the situation that my laptop completely freezes after login in sddm (that means: while KDE is loading). During that time: - Fans run high - laptop is completely unuseable (no mouse or keyboard-input accepted, can't switch to other terminal, etc ...) - only a long press to the power-button helps . - network-connections break (tried to monitor the system remotely, but when the error occurs, also the ssh-connection fails) - the kern.log stops and contains only a few lines of rubbish: Dec 3 11:01:37 orbit kernel: [ 18.951805] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM Dec 3 11:01:37 orbit kernel: [ 18.951808] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95) Dec 3 11:01:37 orbit kernel: [ 18.951891] nouveau 0000:01:00.0: DRM: suspending console... Dec 3 11:01:37 orbit kernel: [ 18.951894] nouveau 0000:01:00.0: DRM: suspending display... Dec 3 11:01:37 orbit kernel: [ 18.951902] nouveau 0000:01:00.0: DRM: evicting buffers... Dec 3 11:01:37 orbit kernel: [ 18.960908] nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle... Dec 3 11:01:37 orbit kernel: [ 18.960935] nouveau 0000:01:00.0: DRM: suspending client object trees... Dec 3 11:01:37 orbit kernel: [ 18.961192] nouveau 0000:01:00.0: DRM: suspending kernel object tree... ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ... - installed and tested kernel-crashdump, but in this situation it is not triggered (or fails to write a coredump) - (once I tried to leave the machin alone for about 30 min, it does not recover...) As a last resort, I installed netconsole and captured the kernel.log on a remote machine, this revealed, that during the lookup, following "soft lockups" occur: [ 107.926161] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [baloo_file:2491] [ 107.926172] Modules linked in: vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ccm rfcomm bnep joydev acer_wmi sparse_keymap snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw glue_helper ablk_helper cryptd intel_cstate arc4 intel_rapl_perf ath9k ath9k_common ath9k_hw ath input_leds mac80211 uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ath3k videobuf2_core btusb btrtl videodev btbcm rtsx_pci_ms btintel cfg80211 media snd_hda_codec_realtek bluetooth snd_hda_codec_generic lpc_ich memstick snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq_midi snd_pcm[ 135.919531] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [baloo_file:2491] [ 135.919536] Modules linked in: vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ccm rfcomm bnep joydev acer_wmi sparse_keymap snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw glue_helper ablk_helper cryptd intel_cstate arc4 intel_rapl_perf ath9k ath9k_common ath9k_hw ath input_leds mac80211 uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ath3k videobuf2_core btusb btrtl videodev btbcm rtsx_pci_ms btintel cfg80211 media snd_hda_codec_realtek bluetooth snd_hda_codec_generic lpc_ich memstick snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq_midi snd_pcm[ 159.917848] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [systemd-timesyn:502] [ 159.917853] Modules linked in: vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ccm rfcomm bnep joydev acer_wmi sparse_keymap snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw glue_helper ablk_helper cryptd intel_cstate arc4 intel_rapl_perf ath9k ath9k_common ath9k_hw ath input_leds mac80211 uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ath3k videobuf2_core btusb btrtl videodev btbcm rtsx_pci_ms btintel cfg80211 media snd_hda_codec_realtek bluetooth snd_hda_codec_generic lpc_ich memstick snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq_midi snd_pcm[ 163.912901] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [baloo_file:2491] [ 163.912904] Modules linked in: vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ccm rfcomm bnep joydev acer_wmi sparse_keymap snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw glue_helper ablk_helper cryptd intel_cstate arc4 intel_rapl_perf ath9k ath9k_common ath9k_hw ath input_leds mac80211 uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ath3k videobuf2_core btusb btrtl videodev btbcm rtsx_pci_ms btintel cfg80211 media snd_hda_codec_realtek bluetooth snd_hda_codec_generic lpc_ich memstick snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq_midi snd_pcm[ 187.911218] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 23s! [systemd-timesyn:502] [ 187.911221] Modules linked in: vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ccm rfcomm bnep joydev acer_wmi sparse_keymap snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw glue_helper ablk_helper cryptd intel_cstate arc4 intel_rapl_perf ath9k ath9k_common ath9k_hw ath input_leds mac80211 uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ath3k videobuf2_core btusb btrtl videodev btbcm rtsx_pci_ms btintel cfg80211 media snd_hda_codec_realtek bluetooth snd_hda_codec_generic lpc_ich memstick snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq_midi snd_pcm[ 191.906272] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [baloo_file:2491] [ 191.906275] Modules linked in: vmnet(OE) vmw_vsock_vmci_transport vsock vmw_vmci vmmon(OE) ccm rfcomm bnep joydev acer_wmi sparse_keymap snd_hda_codec_hdmi intel_rapl x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw glue_helper ablk_helper cryptd intel_cstate arc4 intel_rapl_perf ath9k ath9k_common ath9k_hw ath input_leds mac80211 uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 ath3k videobuf2_core btusb btrtl videodev btbcm rtsx_pci_ms btintel cfg80211 media snd_hda_codec_realtek bluetooth snd_hda_codec_generic lpc_ich memstick snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq_midi snd_pcm About my setup: lsb_release -rd Description: Ubuntu 16.10 Release: 16.10 (using kubuntu) uname -a Linux orbit 4.8.0-28-generic #30-Ubuntu SMP Fri Nov 11 14:03:52 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux Attached tgz contains: - the log taken from netconsole - the kernel-log from the frozen machine (the netconsole.log belongs to the freeeze at "Dec 3 14:09:40") - the output of dpkg -l (to provide a full list of installed packages/versions) The issue occurs approx. every 3-4 logins, regardless whether it's a fersh startup, or if i logged out before/change user. 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