Ok. I've had some partial success with the addition of: [Sleep] SuspendState=freeze in /etc/systemd/sleep.conf However, I also lose the wifi in the process. The kernel reports: [ 69.744693] ------------[ cut here ]------------ [ 69.744695] Timeout waiting for hardware access (CSR_GP_CNTRL 0xffffffff) [ 69.744730] WARNING: CPU: 2 PID: 1323 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:2008 iwl_trans_pcie_grab_nic_access+0x1e8/0x220 [iwlwifi] [ 69.744731] Modules linked in: usbhid rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ccm cmac ipmi_devintf ipmi_msghandler bnep binfmt_misc nls_iso8859_1 snd_soc_sst_broadwell dell_wmi wmi_bmof snd_soc_sst_haswell_pcm snd_soc_sst_firmware snd_soc_sst_ipc snd_soc_sst_dsp intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel dell_laptop pcbc dell_smbios dell_wmi_descriptor dcdbas aesni_intel aes_x86_64 crypto_simd cryptd glue_helper intel_cstate intel_rapl_perf joydev snd_hda_codec_hdmi cdc_mbim serio_raw cdc_acm btusb cdc_wdm uvcvideo btrtl arc4 cdc_ncm snd_soc_rt298 btbcm input_leds btintel videobuf2_vmalloc usbnet videobuf2_memops mii bluetooth videobuf2_v4l2 videobuf2_common snd_hda_intel videodev [ 69.744760] ecdh_generic media snd_hda_codec iwlmvm snd_hda_core mac80211 hid_sensor_incl_3d snd_soc_rt286 snd_hwdep hid_sensor_rotation i915 snd_soc_rl6347a snd_seq_midi snd_soc_core iwlwifi snd_compress snd_seq_midi_event ac97_bus snd_rawmidi snd_pcm_dmaengine snd_pcm hid_sensor_magn_3d hid_sensor_gyro_3d hid_sensor_als hid_sensor_accel_3d hid_sensor_trigger industrialio_triggered_buffer kfifo_buf snd_seq drm_kms_helper hid_sensor_iio_common hid_multitouch drm cfg80211 industrialio snd_seq_device snd_timer mac_hid wmi i2c_algo_bit fb_sys_fops mei_me snd dw_dmac syscopyarea intel_vbtn sysfillrect sysimgblt dw_dmac_core snd_soc_sst_acpi processor_thermal_device snd_soc_acpi soc_button_array int3400_thermal soundcore video int3403_thermal mei snd_soc_acpi_intel_match sparse_keymap acpi_thermal_rel [ 69.744786] int340x_thermal_zone intel_soc_dts_iosf acpi_pad sch_fq_codel parport_pc ppdev lp parport sunrpc ip_tables x_tables autofs4 mmc_block hid_sensor_custom hid_sensor_hub hid_generic sdhci_pci cqhci sdhci ahci i2c_i801 libahci lpc_ich i2c_hid hid [last unloaded: usbhid] [ 69.744801] CPU: 2 PID: 1323 Comm: NetworkManager Tainted: G OE 4.18.0-13-generic #14-Ubuntu [ 69.744801] Hardware name: Dell Inc. Venue 11 Pro 7140/0XMVMH, BIOS A17 09/10/2018 [ 69.744807] RIP: 0010:iwl_trans_pcie_grab_nic_access+0x1e8/0x220 [iwlwifi] [ 69.744807] Code: 2f f9 49 8d 56 08 bf 00 20 00 00 e8 d2 15 d2 f7 e9 31 ff ff ff 89 c6 48 c7 c7 50 b4 5a c0 c6 05 6f 6c 02 00 01 e8 ca 3c d0 f7 <0f> 0b e9 ec fe ff ff 48 8b 7b 30 48 c7 c1 b8 b4 5a c0 31 d2 31 f6 [ 69.744830] RSP: 0018:ffffba2501ecb190 EFLAGS: 00010086 [ 69.744831] RAX: 0000000000000000 RBX: ffff965a4f7f0018 RCX: 0000000000000006 [ 69.744832] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff965a5e5164b0 [ 69.744833] RBP: ffffba2501ecb1b0 R08: 0000000000000001 R09: 00000000000003a9 [ 69.744834] R10: 0000000000000004 R11: 0000000000000000 R12: ffff965a4f7f8f50 [ 69.744834] R13: ffffba2501ecb1c0 R14: 00000000ffffffff R15: ffff965a4f7f0220 [ 69.744836] FS: 00007f8e1b5e5bc0(0000) GS:ffff965a5e500000(0000) knlGS:0000000000000000 [ 69.744837] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.744837] CR2: 000055f0beff4010 CR3: 00000001fd4e2001 CR4: 00000000003606e0 [ 69.744838] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.744839] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.744840] Call Trace: [ 69.744846] iwl_write_prph+0x3d/0x90 [iwlwifi] [ 69.744852] iwl_pcie_apm_init+0x1db/0x240 [iwlwifi] [ 69.744858] iwl_trans_pcie_start_hw+0x52/0x1d0 [iwlwifi] [ 69.744864] iwl_mvm_up+0x3c/0x9c0 [iwlmvm] [ 69.744867] ? skb_dequeue+0x59/0x70 [ 69.744869] ? wireless_nlevent_flush+0x78/0x80 [ 69.744874] __iwl_mvm_mac_start+0x29b/0x300 [iwlmvm] [ 69.744880] iwl_mvm_mac_start+0x4c/0x130 [iwlmvm] [ 69.744882] ? inetdev_event+0x77/0x500 [ 69.744896] drv_start+0x48/0x100 [mac80211] [ 69.744909] ieee80211_do_open+0x436/0x840 [mac80211] [ 69.744922] ieee80211_open+0x52/0x60 [mac80211] [ 69.744924] __dev_open+0xd5/0x170 [ 69.744925] __dev_change_flags+0x184/0x1f0 [ 69.744926] dev_change_flags+0x27/0x60 [ 69.744928] do_setlink+0x307/0xe10 [ 69.744933] ? iwl_pcie_txq_inc_wr_ptr+0x97/0x110 [iwlwifi] [ 69.744936] ? nla_parse+0xbf/0xe0 [ 69.744938] ? inet6_validate_link_af+0x4f/0x70 [ 69.744939] ? nla_parse+0x35/0xe0 [ 69.744941] rtnl_newlink+0x511/0x8c0 [ 69.744943] ? __snmp6_fill_stats64.isra.57+0xf6/0x120 [ 69.744945] ? __nla_reserve+0x41/0x50 [ 69.744946] ? __nla_put+0x20/0x30 [ 69.744949] ? _raw_read_unlock_bh+0x20/0x30 [ 69.744950] ? inet6_fill_ifla6_attrs+0x4ae/0x4d0 [ 69.744952] ? __kmalloc_node_track_caller+0x1fe/0x2c0 [ 69.744954] ? pskb_expand_head+0x73/0x2f0 [ 69.744956] ? __kmalloc_reserve.isra.48+0x31/0x90 [ 69.744958] ? security_sock_rcv_skb+0x2f/0x50 [ 69.744959] ? skb_queue_tail+0x43/0x50 [ 69.744961] ? __netlink_sendskb+0x56/0x70 [ 69.744963] ? netlink_unicast+0x212/0x260 [ 69.744966] ? security_capset+0x70/0x70 [ 69.744968] ? ns_capable_common+0x6c/0x70 [ 69.744970] ? ns_capable+0x13/0x20 [ 69.744971] rtnetlink_rcv_msg+0x213/0x300 [ 69.744973] ? legitimize_mnt+0x12/0x50 [ 69.744974] ? rtnl_calcit.isra.33+0x100/0x100 [ 69.744976] netlink_rcv_skb+0x52/0x130 [ 69.744977] rtnetlink_rcv+0x15/0x20 [ 69.744979] netlink_unicast+0x1a4/0x260 [ 69.744981] netlink_sendmsg+0x20b/0x3d0 [ 69.744983] sock_sendmsg+0x3e/0x50 [ 69.744984] ___sys_sendmsg+0x295/0x2f0 [ 69.744987] ? rtnl_unlock+0xe/0x10 [ 69.744988] ? addrconf_sysctl_forward+0x114/0x280 [ 69.744990] ? dev_forward_change+0x140/0x140 [ 69.744992] ? lockref_put_or_lock+0x60/0x80 [ 69.744994] ? __fget_light+0x54/0x60 [ 69.744996] __sys_sendmsg+0x5c/0xa0 [ 69.744998] __x64_sys_sendmsg+0x1f/0x30 [ 69.745000] do_syscall_64+0x5a/0x110 [ 69.745002] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.745003] RIP: 0033:0x7f8e1f41db47 [ 69.745003] Code: 44 00 00 41 54 41 89 d4 55 48 89 f5 53 89 fb 48 83 ec 10 e8 3b ed ff ff 44 89 e2 48 89 ee 89 df 41 89 c0 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 48 89 44 24 08 e8 74 ed ff ff 48 [ 69.745026] RSP: 002b:00007fff3c7200b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e [ 69.745027] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f8e1f41db47 [ 69.745028] RDX: 0000000000000000 RSI: 00007fff3c720100 RDI: 0000000000000007 [ 69.745029] RBP: 00007fff3c720100 R08: 0000000000000000 R09: 0000000000000000 [ 69.745030] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 69.745030] R13: 0000000000000000 R14: 00007fff3c7202b8 R15: 00007fff3c7202ac [ 69.745032] ---[ end trace 15f44c0bb8ebf15a ]--- [ 69.745035] iwlwifi 0000:01:00.0: iwlwifi transaction failed, dumping registers [ 69.745038] iwlwifi 0000:01:00.0: iwlwifi device config registers: [ 69.745062] iwlwifi 0000:01:00.0: 00000000: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff [ 69.745065] iwlwifi 0000:01:00.0: 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff [ 69.745066] iwlwifi 0000:01:00.0: iwlwifi device memory mapped registers: [ 69.745080] iwlwifi 0000:01:00.0: 00000000: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff [ 69.745082] iwlwifi 0000:01:00.0: 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff [ 69.745376] iwlwifi 0000:01:00.0: iwlwifi parent port (0000:00:1c.0) config registers: [ 69.745392] iwlwifi 0000:00:1c.0: 00000000: 9c948086 00100007 060400e3 00810010 00000000 00000000 00010100 200000f0 [ 69.745394] iwlwifi 0000:00:1c.0: 00000020: f710f710 0001fff1 00000000 00000000 00000000 00000040 00000000 001003ff [ 69.888034] mmc0: Tuning timeout, falling back to fixed sampling clock [ 70.891607] iwlwifi 0000:01:00.0: Could not load the [0] uCode section [ 70.891633] iwlwifi 0000:01:00.0: Failed to start INIT ucode: -5 [ 70.891636] iwlwifi 0000:01:00.0: Failed to run INIT ucode: -5 [ 70.891644] iwlwifi 0000:01:00.0: Failed to start RT ucode: -5 [ 74.912674] iwlwifi 0000:01:00.0: Could not load the [0] uCode section [ 74.912688] iwlwifi 0000:01:00.0: Failed to start INIT ucode: -5 [ 74.912690] iwlwifi 0000:01:00.0: Failed to run INIT ucode: -5 [ 74.912692] iwlwifi 0000:01:00.0: Failed to start RT ucode: -5 [ 78.888199] iwlwifi 0000:01:00.0: Could not load the [0] uCode section [ 78.888212] iwlwifi 0000:01:00.0: Failed to start INIT ucode: -5 [ 78.888214] iwlwifi 0000:01:00.0: Failed to run INIT ucode: -5 [ 78.888216] iwlwifi 0000:01:00.0: Failed to start RT ucode: -5 I'm about to try it with the Mainline kernel as @penalvch suggests.