Initial Problem
Firstly, I think I should note that I have a Skylake CPU, as I have heard there are issues with Skylake CPUs and this i915 driver from here. I don't really understand enough about linux to feel comfortable doing the things they mention however. So I would appreciate anyone to explain what I would be doing as much as possible. I also updated to Stretch, as I had heard that they had better support for the Skylake. So that is the current version I am on.
My issue stems from a slow startup which I noticed after I repartitioned my / to make it larger. I did this by removing swap, which was between my / and /home, and then I extended / into the beginning of /home, and then cut the end of /home to recreate swap. I've already fixed all the UUID stuff. All of this using a Gparted live CD.
I think that the issue is stemming from something in the kernel, as
systemd-analyze: Startup finished in 16.130s (firmware) + 2.525s (loader) + 33.178s (kernel) + 10.969s (userspace) = 1min 2.804s so there appears to be some issue with the kernel loading properly.
Also, dmesg returns the following segment (I cut it out because it is the part that contains errors). So it looks like there is a missing i915 driver perhaps? I am unsure where to look for that.
[ 33.513592] intel_rapl: Found RAPL domain package
[ 33.513593] intel_rapl: Found RAPL domain core
[ 33.513594] intel_rapl: Found RAPL domain uncore
[ 33.513595] intel_rapl: Found RAPL domain dram
[ 33.517028] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 33.517550] i915 0000:00:02.0: firmware: failed to load i915/skl_dmc_ver1_26.bin (-2)
[ 33.517553] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1_26.bin failed with error -2
[ 33.517554] i915 0000:00:02.0: Failed to load DMC firmware [https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling runtime power management.
[ 33.529588] [drm] GuC firmware load skipped
[ 33.532829] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 33.532888] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input13
[ 33.532950] [drm] Initialized i915 1.6.0 20160711 for 0000:00:02.0 on minor 0
[ 33.559664] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 33.559932] fbcon: inteldrmfb (fb0) is primary device
[ 33.581390] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC892: line_outs=3 (0x14/0x15/0x16/0x0/0x0) type:line
[ 33.581390] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 33.581391] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
[ 33.581391] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
[ 33.581392] snd_hda_codec_realtek hdaudioC0D0: dig-out=0x11/0x1e
[ 33.581392] snd_hda_codec_realtek hdaudioC0D0: inputs:
[ 33.581393] snd_hda_codec_realtek hdaudioC0D0: Front Mic=0x19
[ 33.581393] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18
[ 33.581393] snd_hda_codec_realtek hdaudioC0D0: Line=0x1a
[ 33.599112] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input14
[ 33.599153] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input15
[ 33.599184] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input16
[ 33.599209] input: HDA Intel PCH Line Out Front as /devices/pci0000:00/0000:00:1f.3/sound/card0/input17
[ 33.599234] input: HDA Intel PCH Line Out Surround as /devices/pci0000:00/0000:00:1f.3/sound/card0/input18
[ 33.599258] input: HDA Intel PCH Line Out CLFE as /devices/pci0000:00/0000:00:1f.3/sound/card0/input19
[ 33.599285] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input20
[ 33.599312] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input21
[ 33.599342] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input22
[ 34.278927] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.320637] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.362341] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.404044] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.445749] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.487451] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.529151] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 34.529601] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting
[ 34.573582] Console: switching to colour frame buffer device 240x67
[ 34.592652] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 34.686901] EXT4-fs (sda4): mounted filesystem with ordered data mode. Opts: (null)
[ 34.861106] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)
[ 34.879100] [drm] RC6 on
[ 35.443123] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 35.662991] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 38.593098] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[ 38.593160] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 6351.566645] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.608392] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.650141] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.691875] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.733621] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.775352] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.817087] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.817536] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting
[ 6351.884729] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.926468] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6351.968201] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6352.009936] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6352.051673] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6352.093401] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6352.135129] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 6352.135577] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting
[ 6352.151887] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
I think this issue may be the reason my MATLAB has visual tearing, as it is mentioned in this post. Do I just need to sudo apt-get install firmware-misc-nonfree? I have had graphical tearing in MATLAB for as long as I can remember, but only now after I have repartitioned / do I see this boot issue.
Update
I installed the firmware package. The restart went smooth, and much more quickly:
systemd-analyze : Startup finished in 16.340s (firmware) + 2.347s (loader) + 2.406s (kernel) + 10.739s (userspace) = 31.834s
And in dmesg, the firmware seems to load, displaying:
[ 2.936930] i915 0000:00:02.0: firmware: direct-loading firmware i915/skl_dmc_ver1_26.bin
[ 2.937267] [drm] Finished loading i915/skl_dmc_ver1_26.bin (v1.26)
However, I still have this error from before:
[ 3.683213] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.725006] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.766802] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.808607] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.850408] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.892210] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.933994] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full retries, give up
[ 3.934444] [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting
How can I go about troubleshooting this?
