I upgraded to 4.8.7 and the system boots and my root partition gets decrypted but right after that both of my monitors turn off and looking at syslog from 4.8.6 shows the following:
Nov 12 11:54:24 user-desktop kernel: [ 19.853197] ------------[ cut here ]------------ Nov 12 11:54:24 user-desktop kernel: [ 19.853206] WARNING: CPU: 2 PID: 177 at fs/proc/proc_sysctl.c:1607 ops_exit_list.isra.4+0x33/0x60 Nov 12 11:54:24 user-desktop kernel: [ 19.853210] Modules linked in: amdgpu eeepc_wmi i2c_algo_bit asus_wmi drm_kms_helper video rfkill snd_hda_codec_realtek ttm snd_hda_codec_generic snd_hda_codec_hdmi drm snd_hda_intel snd_usb_audio sparse_keymap snd_hda_codec mxm_wmi snd_usbmidi_lib snd_hda_core efi_pstore snd_hwdep snd_rawmidi evdev snd_seq_device joydev snd_pcm serio_raw pcspkr efivars fam15h_power k10temp snd_timer snd sp5100_tco i2c_piix4 sg soundcore i2c_core shpchp tpm_infineon tpm_tis tpm_tis_core tpm wmi button it87 hwmon_vid autofs4 ext4 crc16 jbd2 mbcache algif_skcipher af_alg dm_crypt dm_mod hid_generic usbhid hid sr_mod cdrom sd_mod ohci_pci crct10dif_pclmul crc32_pclmul crc32c_intel aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd psmouse ohci_hcd ahci libahci ehci_pci ehci_hcd libata xhci_pci xhci_hcd e1000e usbcore scsi_mod ptp usb_common pps_core Nov 12 11:54:24 user-desktop kernel: [ 19.853264] CPU: 2 PID: 177 Comm: kworker/u16:2 Not tainted 4.8.7 #1 Nov 12 11:54:24 user-desktop kernel: [ 19.853267] Hardware name: To be filled by O.E.M. To be filled by O.E.M./CROSSHAIR V FORMULA-Z, BIOS 2201 03/23/2015 Nov 12 11:54:24 user-desktop kernel: [ 19.853273] Workqueue: netns cleanup_net Nov 12 11:54:24 user-desktop kernel: [ 19.853276] 0000000000000286 00000000b98071d2 ffffffff81302a8f 0000000000000000 Nov 12 11:54:24 user-desktop kernel: [ 19.853281] 0000000000000000 ffffffff81076f54 ffff880814f88040 ffff8808140efdf0 Nov 12 11:54:24 user-desktop kernel: [ 19.853285] ffffffff818f11d8 ffffffff818f11e0 ffff8808140efde0 0000000000000200 Nov 12 11:54:24 user-desktop kernel: [ 19.853290] Call Trace: Nov 12 11:54:24 user-desktop kernel: [ 19.853295] [<ffffffff81302a8f>] ? dump_stack+0x5c/0x7d Nov 12 11:54:24 user-desktop kernel: [ 19.853299] [<ffffffff81076f54>] ? __warn+0xc4/0xe0 Nov 12 11:54:24 user-desktop kernel: [ 19.853302] [<ffffffff8149e243>] ? ops_exit_list.isra.4+0x33/0x60 Nov 12 11:54:24 user-desktop kernel: [ 19.853305] [<ffffffff8149f230>] ? cleanup_net+0x1b0/0x290 Nov 12 11:54:24 user-desktop kernel: [ 19.853309] [<ffffffff8108fefd>] ? process_one_work+0x14d/0x410 Nov 12 11:54:24 user-desktop kernel: [ 19.853312] [<ffffffff81090cc2>] ? worker_thread+0x62/0x490 Nov 12 11:54:24 user-desktop kernel: [ 19.853315] [<ffffffff81090c60>] ? rescuer_thread+0x340/0x340 Nov 12 11:54:24 user-desktop kernel: [ 19.853318] [<ffffffff81095f3f>] ? kthread+0xdf/0x100 Nov 12 11:54:24 user-desktop kernel: [ 19.853322] [<ffffffff8102b78b>] ? __switch_to+0x2bb/0x710 Nov 12 11:54:24 user-desktop kernel: [ 19.853325] [<ffffffff815a371f>] ? ret_from_fork+0x1f/0x40 Nov 12 11:54:24 user-desktop kernel: [ 19.853328] [<ffffffff81095e60>] ? kthread_park+0x50/0x50 Nov 12 11:54:24 user-desktop kernel: [ 19.853331] ---[ end trace c4840b46b58dbe12 ]---
