dmesg > dmesg.txt, after performing "resume-trace" debugging procedure for finding buggy drivers. The wiki page and kern.log state that the system clock will need to be reset after the procedure. This did not happen. I do not know if this means the trace did not work as expected, or if someone or something ran ntp-date after the process (systemd?). I also do not see any "hash matches" entries in dmesg.txt at all. Mar 25 11:07:27 aargh kernel: [ 234.903292] PM: Enabling pm_trace changes system date and time during resume. Mar 25 11:07:27 aargh kernel: [ 234.903292] PM: Correct system time has to be restored manually after resume. Mar 25 11:07:27 aargh kernel: [ 235.042115] ahci 0000:00:1f.2: port does not support device sleep Mar 25 11:07:52 aargh kernel: [ 235.159382] PM: Syncing filesystems ... done. Mar 25 11:07:52 aargh kernel: [ 235.162773] PM: Preparing system for mem sleep Mar 25 11:07:52 aargh kernel: [ 235.162900] Freezing user space processes ... (elapsed 0.001 seconds) done. Mar 25 11:07:52 aargh kernel: [ 235.164660] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. Mar 25 11:07:52 aargh kernel: [ 235.165867] PM: Entering mem sleep Mar 25 11:07:52 aargh kernel: [ 235.165882] Suspending console(s) (use no_console_suspend to debug) Mar 25 11:07:52 aargh kernel: [ 235.166628] cfg80211: Calling CRDA to update world regulatory domain Mar 25 11:07:52 aargh kernel: [ 235.166746] sd 0:0:0:0: [sda] Synchronizing SCSI cache Mar 25 11:07:52 aargh kernel: [ 235.166955] sd 0:0:0:0: [sda] Stopping disk Mar 25 11:07:52 aargh kernel: [ 235.226018] i8042 aux 00:03: System wakeup disabled by ACPI Mar 25 11:07:52 aargh kernel: [ 235.226035] i8042 kbd 00:02: System wakeup enabled by ACPI Mar 25 11:07:52 aargh kernel: [ 236.235376] [drm:stop_ring [i915]] *ERROR* render ring : timed out trying to stop ring Mar 25 11:07:52 aargh kernel: [ 236.579776] PM: suspend of devices complete after 1412.325 msecs Mar 25 11:07:52 aargh kernel: [ 236.619802] PM: late suspend of devices complete after 39.979 msecs Mar 25 11:07:52 aargh kernel: [ 236.620364] xhci_hcd 0000:00:14.0: System wakeup enabled by ACPI Mar 25 11:07:52 aargh kernel: [ 236.620370] r8169 0000:04:00.0: System wakeup enabled by ACPI Mar 25 11:07:52 aargh kernel: [ 236.636115] PM: noirq suspend of devices complete after 16.295 msecs Mar 25 11:07:52 aargh kernel: [ 236.636387] ACPI: Preparing to enter system sleep state S3 Mar 25 11:07:52 aargh kernel: [ 236.703833] PM: Saving platform NVS memory Mar 25 11:07:52 aargh kernel: [ 236.703838] Disabling non-boot CPUs ... Mar 25 11:07:52 aargh kernel: [ 236.703868] intel_pstate CPU 1 exiting Mar 25 11:07:52 aargh kernel: [ 236.704043] Broke affinity for irq 49 Mar 25 11:07:52 aargh kernel: [ 236.705053] kvm: disabling virtualization on CPU1 Mar 25 11:07:52 aargh kernel: [ 236.705063] smpboot: CPU 1 is now offline Mar 25 11:07:52 aargh kernel: [ 236.705396] intel_pstate CPU 2 exiting Mar 25 11:07:52 aargh kernel: [ 236.706548] kvm: disabling virtualization on CPU2 Mar 25 11:07:52 aargh kernel: [ 236.706556] smpboot: CPU 2 is now offline Mar 25 11:07:52 aargh kernel: [ 236.706866] intel_pstate CPU 3 exiting Mar 25 11:07:52 aargh kernel: [ 236.706965] Broke affinity for irq 18 Mar 25 11:07:52 aargh kernel: [ 236.706973] Broke affinity for irq 46 Mar 25 11:07:52 aargh kernel: [ 236.707984] kvm: disabling virtualization on CPU3 Mar 25 11:07:52 aargh kernel: [ 236.707995] smpboot: CPU 3 is now offline Mar 25 11:07:52 aargh kernel: [ 236.709883] ACPI: Low-level resume complete Mar 25 11:07:52 aargh kernel: [ 236.709948] PM: Restoring platform NVS memory Mar 25 11:07:52 aargh kernel: [ 236.710351] Enabling non-boot CPUs ... Mar 25 11:07:52 aargh kernel: [ 236.710395] x86: Booting SMP configuration: Mar 25 11:07:52 aargh kernel: [ 236.710396] smpboot: Booting Node 0 Processor 1 APIC 0x2 Mar 25 11:07:52 aargh kernel: [ 236.722847] kvm: enabling virtualization on CPU1 Mar 25 11:07:52 aargh kernel: [ 236.725236] CPU1 is up Mar 25 11:07:52 aargh kernel: [ 236.725266] smpboot: Booting Node 0 Processor 2 APIC 0x1 Mar 25 11:07:52 aargh kernel: [ 236.737696] kvm: enabling virtualization on CPU2 Mar 25 11:07:52 aargh kernel: [ 236.740126] CPU2 is up Mar 25 11:07:52 aargh kernel: [ 236.740154] smpboot: Booting Node 0 Processor 3 APIC 0x3 Mar 25 11:07:52 aargh kernel: [ 236.752598] kvm: enabling virtualization on CPU3 Mar 25 11:07:52 aargh kernel: [ 236.755058] CPU3 is up Mar 25 11:07:52 aargh kernel: [ 236.760353] ACPI: Waking up from system sleep state S3 Mar 25 11:07:52 aargh kernel: [ 236.954141] xhci_hcd 0000:00:14.0: System wakeup disabled by ACPI Mar 25 11:07:52 aargh kernel: [ 237.080906] PM: noirq resume of devices complete after 170.708 msecs Mar 25 11:07:52 aargh kernel: [ 237.150146] PM: early resume of devices complete after 69.140 msecs Mar 25 11:07:52 aargh kernel: [ 237.529440] usb usb1: root hub lost power or was reset Mar 25 11:07:52 aargh kernel: [ 237.529442] usb usb2: root hub lost power or was reset Mar 25 11:07:52 aargh kernel: [ 237.672537] r8169 0000:04:00.0: System wakeup disabled by ACPI Mar 25 11:07:52 aargh kernel: [ 237.685080] r8169 0000:04:00.0 eth0: link down Mar 25 11:07:52 aargh kernel: [ 237.686312] rtc_cmos 00:01: System wakeup disabled by ACPI Mar 25 11:07:52 aargh kernel: [ 237.686419] i8042 kbd 00:02: System wakeup disabled by ACPI Mar 25 11:07:52 aargh kernel: [ 238.031849] sd 0:0:0:0: [sda] Starting disk Mar 25 11:07:52 aargh kernel: [ 238.199407] usb 1-3: reset high-speed USB device number 2 using xhci_hcd Mar 25 11:07:52 aargh kernel: [ 238.347507] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) Mar 25 11:07:52 aargh kernel: [ 238.349671] ata1.00: failed to get NCQ Send/Recv Log Emask 0x1 Mar 25 11:07:52 aargh kernel: [ 238.350091] ata1.00: failed to get NCQ Send/Recv Log Emask 0x1 Mar 25 11:07:52 aargh kernel: [ 238.350178] ata1.00: configured for UDMA/133 Mar 25 11:07:52 aargh kernel: [ 238.363460] ahci 0000:00:1f.2: port does not support device sleep Mar 25 11:07:52 aargh kernel: [ 238.432410] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88008a94dde0 Mar 25 11:07:52 aargh kernel: [ 238.667891] usb 1-7: reset full-speed USB device number 3 using xhci_hcd Mar 25 11:07:52 aargh kernel: [ 238.796887] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88024fa27500 Mar 25 11:07:52 aargh kernel: [ 238.796890] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88024fa27590 Mar 25 11:07:52 aargh kernel: [ 238.796893] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88024fa27548 Mar 25 11:07:52 aargh kernel: [ 238.796895] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880250b3b588 Mar 25 11:07:52 aargh kernel: [ 238.796897] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880250b3b540 Mar 25 11:07:52 aargh kernel: [ 238.796899] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880250b3ba08 Mar 25 11:07:52 aargh kernel: [ 238.796901] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880250b3b9c0 Mar 25 11:07:52 aargh kernel: [ 238.804089] PM: resume of devices complete after 1652.261 msecs Mar 25 11:07:52 aargh kernel: [ 238.804372] ------------[ cut here ]------------ Mar 25 11:07:52 aargh kernel: [ 238.804379] WARNING: CPU: 3 PID: 471 at /build/buildd/linux-3.19.0/drivers/base/firmware_class.c:1126 _request_firmware+0x72e/0xbd0() Mar 25 11:07:52 aargh kernel: [ 238.804416] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables binfmt_misc nls_iso8859_1 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi hp_wmi sparse_keymap wl(POE) intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm btusb bluetooth joydev serio_raw uvcvideo videobuf2_vmalloc videobuf2_memops cfg80211 videobuf2_core lpc_ich v4l2_common videodev snd_seq media snd_seq_device snd_timer rtsx_pci_ms memstick snd shpchp mei_me mei soundcore 8250_fintek hp_accel lis3lv02d hp_wireless input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul i915 glue_helper ablk_helper cryptd psmouse i2c_algo_bit ahci drm_kms_helper libahci drm r8169 rtsx_pci mii wmi video Mar 25 11:07:52 aargh kernel: [ 238.804437] CPU: 3 PID: 471 Comm: kworker/u17:2 Tainted: P OE 3.19.0-9-generic #9-Ubuntu Mar 25 11:07:52 aargh kernel: [ 238.804438] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.24 11/28/2014 Mar 25 11:07:52 aargh kernel: [ 238.804455] Workqueue: hci0 hci_power_on [bluetooth] Mar 25 11:07:52 aargh kernel: [ 238.804457] ffffffff81b0fa68 ffff88003f6afb78 ffffffff817c09b5 ffffffff81c54d78 Mar 25 11:07:52 aargh kernel: [ 238.804459] 0000000000000000 ffff88003f6afbb8 ffffffff8107595a ffffffff81517f6a Mar 25 11:07:52 aargh kernel: [ 238.804461] ffff88003f6afcd0 ffff880250db3540 ffff88008e5f4840 00000000fffffff5 Mar 25 11:07:52 aargh kernel: [ 238.804462] Call Trace: Mar 25 11:07:52 aargh kernel: [ 238.804467] [] dump_stack+0x45/0x57 Mar 25 11:07:52 aargh kernel: [ 238.804470] [] warn_slowpath_common+0x8a/0xc0 Mar 25 11:07:52 aargh kernel: [ 238.804474] [] ? _request_firmware+0x5a/0xbd0 Mar 25 11:07:52 aargh kernel: [ 238.804476] [] warn_slowpath_null+0x1a/0x20 Mar 25 11:07:52 aargh kernel: [ 238.804478] [] _request_firmware+0x72e/0xbd0 Mar 25 11:07:52 aargh kernel: [ 238.804482] [] request_firmware+0x35/0x50 Mar 25 11:07:52 aargh kernel: [ 238.804487] [] btusb_setup_bcm_patchram+0x89/0x570 [btusb] Mar 25 11:07:52 aargh kernel: [ 238.804489] [] ? rpm_idle+0xd6/0x230 Mar 25 11:07:52 aargh kernel: [ 238.804501] [] hci_dev_do_open+0xe1/0xa90 [bluetooth] Mar 25 11:07:52 aargh kernel: [ 238.804505] [] ? __switch_to+0x150/0x5f0 Mar 25 11:07:52 aargh kernel: [ 238.804515] [] hci_power_on+0x40/0x200 [bluetooth] Mar 25 11:07:52 aargh kernel: [ 238.804518] [] process_one_work+0x158/0x430 Mar 25 11:07:52 aargh kernel: [ 238.804521] [] worker_thread+0x5b/0x530 Mar 25 11:07:52 aargh kernel: [ 238.804526] [] ? rescuer_thread+0x3a0/0x3a0 Mar 25 11:07:52 aargh kernel: [ 238.804531] [] kthread+0xc9/0xe0 Mar 25 11:07:52 aargh kernel: [ 238.804535] [] ? kthread_create_on_node+0x1c0/0x1c0 Mar 25 11:07:52 aargh kernel: [ 238.804540] [] ret_from_fork+0x7c/0xb0 Mar 25 11:07:52 aargh kernel: [ 238.804545] [] ? kthread_create_on_node+0x1c0/0x1c0 Mar 25 11:07:52 aargh kernel: [ 238.804547] ---[ end trace 211020db6f55ae1d ]--- Mar 25 11:07:52 aargh kernel: [ 238.804550] bluetooth hci0: firmware: brcm/BCM43142A0-0a5c-216c.hcd will not be loaded Mar 25 11:07:52 aargh kernel: [ 238.804553] Bluetooth: hci0: BCM: patch brcm/BCM43142A0-0a5c-216c.hcd not found Mar 25 11:07:52 aargh kernel: [ 238.804618] PM: Finishing wakeup. Mar 25 11:07:52 aargh kernel: [ 238.804621] Restarting tasks ... done. Mar 25 11:07:52 aargh kernel: [ 238.814829] cfg80211: World regulatory domain updated: Mar 25 11:07:52 aargh kernel: [ 238.814835] cfg80211: DFS Master region: unset Mar 25 11:07:52 aargh kernel: [ 238.814837] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Mar 25 11:07:52 aargh kernel: [ 238.814842] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:07:52 aargh kernel: [ 238.814845] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:07:52 aargh kernel: [ 238.814848] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:07:52 aargh kernel: [ 238.814851] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:07:52 aargh kernel: [ 238.814854] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:07:53 aargh kernel: [ 239.995498] cfg80211: Calling CRDA for country: SG Mar 25 11:07:53 aargh kernel: [ 239.997180] cfg80211: Regulatory domain changed to country: SG Mar 25 11:07:53 aargh kernel: [ 239.997183] cfg80211: DFS Master region: unset Mar 25 11:07:53 aargh kernel: [ 239.997185] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Mar 25 11:07:53 aargh kernel: [ 239.997187] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Mar 25 11:07:53 aargh kernel: [ 239.997189] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Mar 25 11:07:53 aargh kernel: [ 239.997191] cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s) Mar 25 11:07:53 aargh kernel: [ 239.997193] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Mar 25 11:07:54 aargh kernel: [ 240.809919] Bluetooth: hci0 command 0x1003 tx timeout Mar 25 11:11:38 aargh kernel: [ 464.903111] cfg80211: Calling CRDA to update world regulatory domain Mar 25 11:11:38 aargh kernel: [ 464.910317] cfg80211: World regulatory domain updated: Mar 25 11:11:38 aargh kernel: [ 464.910327] cfg80211: DFS Master region: unset Mar 25 11:11:38 aargh kernel: [ 464.910331] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Mar 25 11:11:38 aargh kernel: [ 464.910340] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:11:38 aargh kernel: [ 464.910348] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:11:38 aargh kernel: [ 464.910354] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:11:38 aargh kernel: [ 464.910360] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:11:38 aargh kernel: [ 464.910367] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A) Mar 25 11:11:41 aargh kernel: [ 467.361478] cfg80211: Calling CRDA for country: SG Mar 25 11:11:41 aargh kernel: [ 467.363043] cfg80211: Regulatory domain changed to country: SG Mar 25 11:11:41 aargh kernel: [ 467.363045] cfg80211: DFS Master region: unset Mar 25 11:11:41 aargh kernel: [ 467.363046] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time) Mar 25 11:11:41 aargh kernel: [ 467.363048] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Mar 25 11:11:41 aargh kernel: [ 467.363049] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A) Mar 25 11:11:41 aargh kernel: [ 467.363051] cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s) Mar 25 11:11:41 aargh kernel: [ 467.363052] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)