dmesg shows a crash from graphics kernel driver. We need to test with AMI Bios to see if it's there as well, then if it's not, fix it. It's probably just a misconfiguration of the DP interface, probably a DP interface is enabled even though it shouldn't be.
crash is this :
[ 23.316870] Not enough lanes (0) for DP on port E [ 23.316887] ------------[ cut here ]------------ [ 23.316941] WARNING: CPU: 0 PID: 359 at /build/linux-fHlJSJ/linux-4.12.6/drivers/gpu/drm/i915/intel_dp.c:5924 intel_dp_init_connector+0x8f9/0x1120 [i915] [ 23.316947] Modules linked in: snd_soc_skl snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_sst_match snd_soc_core intel_rapl snd_compress x86_pkg_temp_thermal intel_powerclamp coretemp arc4 i915(+) kvm_intel snd_hda_intel kvm ath9k ath9k_common irqbypass ath9k_hw ath3k intel_cstate btusb snd_hda_codec btrtl ath btbcm btintel mac80211 intel_uncore video intel_rapl_perf bluetooth iTCO_wdt snd_hda_core snd_hwdep cfg80211 snd_pcm drm_kms_helper snd_timer snd ecdh_generic processor_thermal_device drm int340x_thermal_zone rfkill serio_raw pcspkr soundcore evdev iTCO_vendor_support joydev shpchp sg i2c_algo_bit intel_soc_dts_iosf intel_pch_thermal topstar_laptop battery ac sparse_keymap button parport_pc ppdev lp parport ip_tables x_tables autofs4 ext4 crc16 jbd2 crc32c_generic [ 23.316994] fscrypto ecb mbcache algif_skcipher af_alg hid_logitech_hidpp hid_logitech_dj usbhid hid dm_crypt dm_mod sd_mod crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd psmouse ahci libahci xhci_pci i2c_i801 libata xhci_hcd usbcore scsi_mod usb_common [ 23.317014] CPU: 0 PID: 359 Comm: systemd-udevd Not tainted 4.12.0-1-amd64 #1 Debian 4.12.6-1 [ 23.317018] Hardware name: Purism Librem 13 v2/Librem 13 v2, BIOS 4.6-a86d1b-Purism-5 07/27/2017 [ 23.317021] task: ffff9ae0f45e8080 task.stack: ffffbcdfc0c38000 [ 23.317050] RIP: 0010:intel_dp_init_connector+0x8f9/0x1120 [i915] [ 23.317052] RSP: 0018:ffffbcdfc0c3b9c8 EFLAGS: 00010282 [ 23.317055] RAX: 0000000000000025 RBX: ffff9ae0f8e38000 RCX: 0000000000000000 [ 23.317057] RDX: 0000000000000000 RSI: ffff9ae0fec0dee8 RDI: ffff9ae0fec0dee8 [ 23.317059] RBP: ffff9ae0f8e38000 R08: 0000000000000000 R09: 000000000000023e [ 23.317062] R10: 000000000000000b R11: ffffffffa60cddcd R12: ffff9ae0f8e46800 [ 23.317064] R13: 0000000000000004 R14: 0000000000000000 R15: ffff9ae0f72fa000 [ 23.317066] FS: 00007f64c6b3f8c0(0000) GS:ffff9ae0fec00000(0000) knlGS:0000000000000000 [ 23.317070] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.317072] CR2: 000055b6e983a068 CR3: 0000000173ee7000 CR4: 00000000003406f0 [ 23.317074] Call Trace: [ 23.317101] ? intel_ddi_init+0x390/0x450 [i915] [ 23.317128] ? intel_modeset_init+0xd9c/0x1890 [i915] [ 23.317152] ? intel_i2c_reset+0x3e/0x40 [i915] [ 23.317174] ? intel_setup_gmbus+0x2c5/0x2e0 [i915] [ 23.317197] ? i915_driver_load+0xb07/0x1370 [i915] [ 23.317200] ? mutex_lock+0xe/0x30 [ 23.317204] ? acpi_dev_found+0x5f/0x70 [ 23.317207] ? local_pci_probe+0x3f/0x90 [ 23.317210] ? pci_device_probe+0x150/0x170 [ 23.317213] ? driver_probe_device+0x293/0x440 [ 23.317216] ? __driver_attach+0xda/0xe0 [ 23.317219] ? driver_probe_device+0x440/0x440 [ 23.317222] ? driver_probe_device+0x440/0x440 [ 23.317225] ? bus_for_each_dev+0x67/0xb0 [ 23.317228] ? bus_add_driver+0x16a/0x260 [ 23.317230] ? driver_register+0x57/0xc0 [ 23.317233] ? 0xffffffffc0c26000 [ 23.317235] ? do_one_initcall+0x4e/0x190 [ 23.317238] ? __vunmap+0x71/0xb0 [ 23.317240] ? __vunmap+0x71/0xb0 [ 23.317243] ? do_init_module+0x5b/0x1fe [ 23.317247] ? load_module+0x2635/0x2b90 [ 23.317251] ? SYSC_finit_module+0xc6/0xf0 [ 23.317253] ? SYSC_finit_module+0xc6/0xf0 [ 23.317256] ? do_syscall_64+0x7c/0xf0 [ 23.317259] ? entry_SYSCALL64_slow_path+0x25/0x25 [ 23.317262] Code: 00 00 00 e9 6d fa ff ff 49 c7 86 00 0b 00 00 b0 d2 b8 c0 e9 be f7 ff ff 89 c2 31 f6 48 c7 c7 78 69 be c0 83 c2 41 e8 8d e0 7e e4 <0f> ff 31 c0 e9 c0 f9 ff ff ba 01 00 00 00 be 68 4d 01 00 48 89 [ 23.317285] ---[ end trace 22d3ab54fb15cf20 ]---