So, with kernel rc8 and nvme module enabled and i915.preliminary_hw_support=1 in my boot parameters (grub) sometime i can't boot due to error, but sometime it work (this morning 4 try to boot, 0 success) :
Jan 7 10:14:06 debian kernel: [ 13.268486] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input8 Jan 7 10:14:06 debian kernel: [ 13.695176] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout (has irq: 1)! Jan 7 10:14:06 debian kernel: [ 13.711154] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout (has irq: 1)! Jan 7 10:14:06 debian kernel: [ 13.727151] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout (has irq: 1)! Jan 7 10:14:06 debian kernel: [ 13.743147] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout (has irq: 1)! Jan 7 10:14:06 debian kernel: [ 13.759146] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal timeout (has irq: 1)! Jan 7 10:14:06 debian kernel: [ 13.759161] [drm:intel_dp_aux_ch [i915]] *ERROR* dp_aux_ch not done status 0xad40001f ------------[ cut here ]------------ Jan 7 10:14:06 debian kernel: [ 13.783141] WARNING: CPU: 0 PID: 278 at /build/linux-dUKt9u/linux- 4.3.3/drivers/gpu/drm/i915/intel_dp.c:854 intel_dp_aux_ch+0x112/0x670 [i915] () Jan 7 10:14:06 debian kernel: [ 13.783141] dp_aux_ch not started status 0xad40001f Jan 7 10:14:06 debian kernel: [ 13.783165] Modules linked in: nls_utf8 nls_cp437 vfat fat snd_hda_codec_hdmi dell_led snd_hda_codec_realtek snd_hda_codec_generic intel_rapl x86_pkg _temp_thermal intel_powerclamp dell_laptop coretemp dell_wmi dcdbas joydev sparse_keymap kvm_intel kvm psmouse uvcvideo evdev i915 snd_hda_intel efi_pstore serio_raw snd _hda_codec snd_hda_core efivars snd_hwdep snd_pcm videobuf2_vmalloc videobuf2_memops snd_timer rtsx_pci_ms snd soundcore memstick videobuf2_core i2c_i801 drm_kms_helper v4l2_co mmon videodev drm media btusb processor_thermal_device mei_me btrtl shpchp tpm_tis intel_soc_dts_iosf hid_multitouch mei i2c_algo_bit iosf_mbi tpm wmi battery hci_uart btbcm bt intel bluetooth rfkill int3400_thermal video acpi_thermal_rel int3403_thermal int340x_thermal_zone acpi_pad ac button processor parport_pc ppdev lp parport efivarfs autofs4 ext 4 crc16 mbcache jbd2 algif_skcipher af_alg usbhid dm_crypt dm_mod crct10dif_pclmul crc32_pclmul crc32c_intel jitterentropy_rng rtsx_pci_sdmmc mmc_core sha256_ssse3 sha256_gener ic hmac drbg ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd nvme rtsx_pci xhci_pci mfd_core xhci_hcd usbcore usb_common fan thermal i2c_hid hid Jan 7 10:14:06 debian kernel: [ 13.783180] CPU: 0 PID: 278 Comm: kworker/u8:4 Not tainted 4.3.0-1-amd64 #1 Debian 4.3.3-5 Jan 7 10:14:06 debian kernel: [ 13.783181] Hardware name: Dell Inc. XPS 13 9350/0PWNCR, BIOS 1.0.0 09/10/2015 Jan 7 10:14:06 debian kernel: [ 13.783184] Workqueue: events_unbound async_run_entry_fn Jan 7 10:14:06 debian kernel: [ 13.783186] 0000000000000000 000000009fed5c92 ffffffff812ddce9 ffff8802b23cf728 Jan 7 10:14:06 debian kernel: [ 13.783186] ffffffff81072b1d 00000000ad40001f ffff8802b23cf780 00000000fffffff0 Jan 7 10:14:06 debian kernel: [ 13.783187] 0000000000064014 ffff8802b2c30000 ffffffff81072bac ffffffffa06f0210 Jan 7 10:14:06 debian kernel: [ 13.783188] Call Trace: Jan 7 10:14:06 debian kernel: [ 13.783192] [<ffffffff812ddce9>] ? dump_stack+0x40/0x57 Jan 7 10:14:06 debian kernel: [ 13.783194] [<ffffffff81072b1d>] ? warn_slowpath_common+0x7d/0xb0 Jan 7 10:14:06 debian kernel: [ 13.783195] [<ffffffff81072bac>] ? warn_slowpath_fmt+0x5c/0x80 Jan 7 10:14:06 debian kernel: [ 13.783210] [<ffffffffa06ae1a2>] ? intel_dp_aux_ch+0x112/0x670 [i915] Jan 7 10:14:06 debian kernel: [ 13.783212] [<ffffffff810b1590>] ? wake_atomic_t_function+0x60/0x60 Jan 7 10:14:06 debian kernel: [ 13.783226] [<ffffffffa06ae7d0>] ? intel_dp_aux_transfer+0xd0/0x1e0 [i915] Jan 7 10:14:06 debian kernel: [ 13.783242] [<ffffffffa066d704>] ? gen9_read32+0xf4/0x2c0 [i915] Jan 7 10:14:06 debian kernel: [ 13.783246] [<ffffffffa0514c78>] ? drm_dp_dpcd_access+0x68/0x110 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783249] [<ffffffffa0514e27>] ? drm_dp_dpcd_write+0x17/0x20 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783265] [<ffffffffa06b09ea>] ? intel_dp_sink_dpms+0x4a/0xe0 [i915] Jan 7 10:14:06 debian kernel: [ 13.783280] [<ffffffffa06a540f>] ? intel_ddi_pre_enable+0xff/0x310 [i915] Jan 7 10:14:06 debian kernel: [ 13.783296] [<ffffffffa068cda2>] ? haswell_crtc_enable+0x402/0xb70 [i915] Jan 7 10:14:06 debian kernel: [ 13.783310] [<ffffffffa0635f81>] ? intel_display_power_put+0xe1/0x150 [i915] Jan 7 10:14:06 debian kernel: [ 13.783326] [<ffffffffa0688b68>] ? intel_atomic_commit+0x388/0x12f0 [i915] Jan 7 10:14:06 debian kernel: [ 13.783337] [<ffffffffa0484384>] ? drm_atomic_check_only+0x214/0x540 [drm] Jan 7 10:14:06 debian kernel: [ 13.783342] [<ffffffffa051c69f>] ? drm_atomic_helper_set_config+0x1af/0x410 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783349] [<ffffffffa047473e>] ? drm_mode_set_config_internal+0x5e/0xf0 [drm] Jan 7 10:14:06 debian kernel: [ 13.783353] [<ffffffffa051f3ca>] ? restore_fbdev_mode+0xaa/0x110 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783356] [<ffffffffa0521170>] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x20/0x60 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783359] [<ffffffffa05211d9>] ? drm_fb_helper_set_par+0x29/0x50 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783374] [<ffffffffa069ecb6>] ? intel_fbdev_set_par+0x16/0x60 [i915] Jan 7 10:14:06 debian kernel: [ 13.783376] [<ffffffff81347aad>] ? fbcon_init+0x54d/0x5e0 Jan 7 10:14:06 debian kernel: [ 13.783378] [<ffffffff813bdad3>] ? visual_init+0xc3/0x120 Jan 7 10:14:06 debian kernel: [ 13.783379] [<ffffffff813bf6d3>] ? do_bind_con_driver+0x1e3/0x3d0 Jan 7 10:14:06 debian kernel: [ 13.783380] [<ffffffff813bfbfb>] ? do_take_over_console+0x13b/0x190 Jan 7 10:14:06 debian kernel: [ 13.783381] [<ffffffff81343ac3>] ? do_fbcon_takeover+0x53/0xb0 Jan 7 10:14:06 debian kernel: [ 13.783383] [<ffffffff81091225>] ? notifier_call_chain+0x45/0x70 Jan 7 10:14:06 debian kernel: [ 13.783385] [<ffffffff81091531>] ? __blocking_notifier_call_chain+0x41/0x60 Jan 7 10:14:06 debian kernel: [ 13.783387] [<ffffffff8134fc6b>] ? register_framebuffer+0x20b/0x340 Jan 7 10:14:06 debian kernel: [ 13.783388] [<ffffffff813f6b29>] ? vga_switcheroo_client_fb_set+0x19/0x70 Jan 7 10:14:06 debian kernel: [ 13.783392] [<ffffffffa052146c>] ? drm_fb_helper_initial_config+0x26c/0x420 [drm_kms_helper] Jan 7 10:14:06 debian kernel: [ 13.783393] [<ffffffff81092ad5>] ? async_run_entry_fn+0x45/0x130 Jan 7 10:14:06 debian kernel: [ 13.783394] [<ffffffff8108a40f>] ? process_one_work+0x19f/0x3d0 Jan 7 10:14:06 debian kernel: [ 13.783395] [<ffffffff8108a68d>] ? worker_thread+0x4d/0x450 Jan 7 10:14:06 debian kernel: [ 13.783396] [<ffffffff8108a640>] ? process_one_work+0x3d0/0x3d0 Jan 7 10:14:06 debian kernel: [ 13.783397] [<ffffffff810904bd>] ? kthread+0xcd/0xf0 Jan 7 10:14:06 debian kernel: [ 13.783399] [<ffffffff810903f0>] ? kthread_create_on_node+0x190/0x190 Jan 7 10:14:06 debian kernel: [ 13.783401] [<ffffffff8158514f>] ? ret_from_fork+0x3f/0x70 Jan 7 10:14:06 debian kernel: [ 13.783402] [<ffffffff810903f0>] ? kthread_create_on_node+0x190/0x190 Jan 7 10:14:06 debian kernel: [ 13.783403] ---[ end trace c80c83d8146f578e ]--- It seems that it's not the same error that the first time. thank you
