drm:drm_edid_block_valid замедление начальной загрузки

drm_edid_block_valid появляется много в dmesg, где я ищу причины своего медленного процесса начальной загрузки. Вот вывод:

[   13.884900] audit: type=1400 audit(1467376765.370:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/cupsd" pid=627 comm="apparmor_parser"
[   17.774473] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is 209
[   17.774484] Raw EDID:
[   17.774486]      00 ff ff ff ff ff ff 00 22 f0 54 29 01 01 01 01
[   17.774486]      1b 17 01 04 a5 34 20 78 23 4c a5 a7 55 4d a2 26
[   17.774487]      10 50 54 21 08 00 d1 c0 81 c0 81 40 81 80 95 00
[   17.774488]      a9 40 b3 00 01 00 d1 c0 81 c0 81 40 81 80 95 00
[   17.774488]      36 00 06 44 21 00 00 1a 00 00 00 fd 00 18 3c 18
[   17.774489]      50 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48
[   17.774490]      50 20 5a 52 32 34 34 30 77 0a 20 20 00 00 00 ff
[   17.774490]      00 43 4e 34 33 32 37 30 4a 4c 5a 0a 20 20 01 a6
[   22.023647] cgroup: new mount options do not match the existing superblock, will be ignored

И также это:

[   35.700972] WARNING: CPU: 2 PID: 498 at /build/linux-BvkamA/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:1144 intel_disable_pipe+0x2b6/0x2c0 [i915]()
[   35.700973] pipe_off wait timed out
[   35.700974] Modules linked in: intel_rapl x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel coretemp input_leds joydev snd_hda_codec snd_hda_core kvm snd_hwdep snd_pcm irqbypass snd_seq_midi snd_seq_midi_event snd_rawmidi crct10dif_pclmul snd_seq crc32_pclmul snd_seq_device snd_timer hp_wmi ie31200_edac sparse_keymap aesni_intel edac_core snd aes_x86_64 soundcore lpc_ich serio_raw lrw gf128mul glue_helper ablk_helper 8250_fintek mac_hid tpm_infineon cryptd parport_pc ppdev lp parport autofs4 hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect e1000e sysimgblt psmouse fb_sys_fops ahci drm libahci ptp pps_core wmi fjes video
[   35.700999] CPU: 2 PID: 498 Comm: plymouthd Not tainted 4.4.0-28-generic #47-Ubuntu
[   35.701000] Hardware name: Hewlett-Packard HP Compaq Elite 8300 SFF/3397, BIOS K01 v02.90 07/16/2013
[   35.701001]  0000000000000286 000000000d3335aa ffff88040aa0bac8 ffffffff813eb1a3
[   35.701003]  ffff88040aa0bb10 ffffffffc027ca70 ffff88040aa0bb00 ffffffff81081102
[   35.701004]  ffff880035a10000 0000000000071008 00000000fffefde4 0000000000071008
[   35.701005] Call Trace:
[   35.701010]  [<ffffffff813eb1a3>] dump_stack+0x63/0x90
[   35.701013]  [<ffffffff81081102>] warn_slowpath_common+0x82/0xc0
[   35.701014]  [<ffffffff8108119c>] warn_slowpath_fmt+0x5c/0x80
[   35.701026]  [<ffffffffc020f376>] intel_disable_pipe+0x2b6/0x2c0 [i915]
[   35.701038]  [<ffffffffc020f72c>] ironlake_crtc_disable+0x8c/0x7c0 [i915]
[   35.701049]  [<ffffffffc020b0ec>] ? intel_crtc_disable_planes+0xdc/0xf0 [i915]
[   35.701060]  [<ffffffffc0218990>] intel_atomic_commit+0x110/0x6f0 [i915]
[   35.701071]  [<ffffffffc00687de>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[   35.701079]  [<ffffffffc0067d1f>] ? drm_atomic_set_crtc_for_connector+0x6f/0xe0 [drm]
[   35.701087]  [<ffffffffc0068c17>] drm_atomic_commit+0x37/0x60 [drm]
[   35.701092]  [<ffffffffc016fb16>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
[   35.701099]  [<ffffffffc0057e42>] drm_mode_set_config_internal+0x62/0x100 [drm]
[   35.701106]  [<ffffffffc005c362>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]
[   35.701112]  [<ffffffffc004d742>] drm_ioctl+0x152/0x540 [drm]
[   35.701119]  [<ffffffffc005bf90>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[   35.701121]  [<ffffffff81220b6f>] do_vfs_ioctl+0x29f/0x490
[   35.701123]  [<ffffffff8106b554>] ? __do_page_fault+0x1b4/0x400
[   35.701124]  [<ffffffff81220dd9>] SyS_ioctl+0x79/0x90
[   35.701126]  [<ffffffff818276b2>] entry_SYSCALL_64_fastpath+0x16/0x71
[   35.701127] ---[ end trace c5b67dc3bdb687af ]---
[   35.765519] [drm:ironlake_crtc_disable [i915]] *ERROR* failed to disable transcoder B
[   35.768073] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
[   35.768091] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
[   35.768114] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder B
[   35.768130] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun
[   35.855896] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is 212
[   35.855897] Raw EDID:
[   35.855898]      00 ff ff ff ff ff ff 00 22 f0 54 29 01 01 01 01
[   35.855898]      1b 17 01 04 a5 34 20 78 23 4c a5 a7 55 4d a2 26
[   35.855899]      10 50 54 21 08 00 d1 c0 81 c0 81 40 55 4d a2 26
[   35.855899]      a9 40 b3 00 01 01 28 3c 80 a0 70 b0 23 40 30 20
[   35.855899]      36 00 06 44 21 00 00 1a 00 00 00 fd 00 18 3c 18
[   35.855899]      50 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48
[   35.855900]      50 20 5a 52 32 34 34 30 77 0a 20 20 00 00 00 ff
[   35.855900]      00 43 4e 34 33 32 37 30 4a 4c 5a 0a 20 20 01 a6
[   58.088907] Raw EDID:
[   58.088911]      00 ff ff ff 01 00 01 00 02 02 06 00 00 00 00 7b
[   58.088912]      1b 17 01 04 a5 34 20 78 23 4c a5 a7 55 4d a2 26
[   58.088912]      10 50 54 21 08 00 d1 c0 81 c0 81 40 81 80 95 00
[   58.088913]      a9 40 b3 00 01 01 28 3c 80 a0 70 b0 23 40 30 20
[   58.088914]      36 00 06 44 21 00 00 1a 00 00 00 fd 00 18 3c 18
[   58.088914]      50 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48
[   58.088915]      50 20 5a 52 32 34 34 30 77 0a 20 20 00 00 00 ff
[   58.088916]      00 43 4e 34 33 32 37 30 4a 4c 5a 0a 20 20 01 a6
[   58.091785] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is 203
[   58.091786] Raw EDID:
[   58.091786]      00 ff ff ff ff ff ff 00 22 f0 54 29 01 01 01 01
[   58.091787]      1b 17 01 04 a5 34 20 78 23 4c 54 29 01 01 01 01
[   58.091788]      10 50 54 21 08 00 d1 c0 81 c0 81 40 81 80 95 00
[   58.091788]      a9 40 b3 00 01 01 28 3c 80 a0 70 b0 23 40 30 20
[   58.091789]      36 00 06 44 21 00 00 1a 00 00 00 fd 00 18 3c 18
[   58.091790]      50 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48
[   58.091790]      50 20 5a 52 32 34 34 30 77 0a 20 20 00 00 00 ff
[   58.091800]      00 43 4e 34 33 32 37 30 4a 4c 5a 0a 20 20 01 a6
[   58.094679] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is 71
[   58.094680] Raw EDID:
[   58.094681]      00 ff ff ff ff ff ff 00 22 f0 54 29 01 01 01 01
[   58.094681]      1b 17 01 04 a5 34 20 78 23 4c a5 a7 55 4d a2 26
[   58.094682]      10 50 54 21 08 00 d1 c0 81 c0 81 40 81 80 95 00
[   58.094683]      a9 40 b3 00 01 01 28 3c 80 a0 70 b0 23 40 30 20
[   58.094683]      36 00 06 44 21 00 00 1a 00 00 00 fd 23 40 30 20
[   58.094684]      50 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48
[   58.094685]      50 20 5a 52 32 34 34 30 77 0a 20 20 00 00 00 ff
[   58.094685]      00 43 4e 34 33 32 37 30 4a 4c 5a 0a 20 20 01 a6
[   58.097544] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is 160
[   58.097545] Raw EDID:
[   58.097545]      00 ff ff ff ff ff ff 00 22 f0 54 29 01 01 01 01
[   58.097546]      1b 17 01 04 a5 34 20 78 23 4c a5 a7 55 4d a2 26
[   58.097547]      10 50 54 21 08 00 d1 c0 81 c0 81 40 81 80 95 00
[   58.097547]      a9 40 b3 00 01 01 28 3c 80 a0 70 b0 23 40 30 20
[   58.097548]      36 00 06 44 21 00 00 1a 00 00 00 fd 00 18 3c 18
[   58.097549]      50 11 00 0a 21 00 00 1a 00 00 00 fd 00 18 3c 18
[   58.097549]      50 20 5a 52 32 34 34 30 77 0a 20 20 00 00 00 ff
[   58.097550]      00 43 4e 34 33 32 37 30 4a 4c 5a 0a 20 20 01 a6
[   58.097552] i915 0000:00:02.0: DP-1: EDID block 0 invalid.

Некоторая дополнительная информация

Поскольку это, кажется, о дисплее, вот некоторая дополнительная информация.

Мои функции установки два монитора, HP ZR2440w и более старый монитор Dell (который я настроил вертикально). Я также замечаю, что во время процесса начальной загрузки, когда экран входа в систему появляется, это появляется сначала только на моем дополнительном мониторе (Dell один), и он игнорирует вертикальную конфигурацию (таким образом, я должен был бы повернуть голову для фактического чтения его). После нескольких секунд затем, это перемещает информацию в основной монитор и фиксирует ориентацию дополнительного монитора.

Я искал вокруг drm:drm_edid_block_valid, но я ничто не мог найти связанным с самим процессом начальной загрузки. Что продолжается?