Bug 93741

(In reply to Alin M Elena from comment #0)
> with kernel-4.4.0-3.g75554c0 i get a black screen at boot... is just after
> grub but before systemd starts logging.. Randomly, once in 10 black screens
> boots.
> 
> however with 4.4.0-rc7-3.g75554c0 built by me with the same configs as the
> 4.4.0 kernel boots every time.

I don't know what those kernels are; what patches do you have on top of upstream? Can you reproduce with vanilla upstream?

Hi Jani,

you are right I repeated with vanilla and the same story...


the diff between default and vanilla is as follow.
[20:48:23 root@baphomet:/boot]: diff /boot/config-4.4.0-3.g75554c0-default /boot/config-4.4.0-3.g75554c0-vanilla 
3c3
< # Linux/x86_64 4.4.0 Kernel Configuration
---
> # Linux/x86 4.4.0 Kernel Configuration
44,46d43
< CONFIG_SUSE_KERNEL=y
< # CONFIG_SUSE_KERNEL_SUPPORTED is not set
< CONFIG_SPLIT_PACKAGE=y
57c54
< CONFIG_LOCALVERSION="-3.g75554c0-default"
---
> CONFIG_LOCALVERSION="-3.g75554c0-vanilla"
395a393
> CONFIG_SCHED_OMIT_FRAME_POINTER=y
950d947
< CONFIG_NF_CONNTRACK_SLP=m
3618d3614
< CONFIG_CRASHER=m
5504d5499
< # CONFIG_USB_EHCI_HCD_SYNOPSYS is not set
7038,7039d7032
< CONFIG_UNWIND_INFO=y
< CONFIG_STACK_UNWIND=y


I have built the head from Linus git and booted... 

Alin

(In reply to Alin M Elena from comment #2)
> I have built the head from Linus git and booted... 

Please tell me the git commit ID of the kernel you've tried from Linus' tree.

Please add drm.debug=14 module parameter, and attach dmesg. If possible, please do so when you're experiencing a black screen (either ssh into the box or ensure you get the logs on disk).

this is the one I tried and booted. 
5807fca

with the logs may be tricky to get since when I get a black screen there is none.. and I have no network card on that machine.

Alin

when 4.4.0 boots I keep getting this... I suspect totally unrelated... 
[27190.667123] ------------[ cut here ]------------
[27190.667138] WARNING: CPU: 2 PID: 21375 at ../drivers/gpu/drm/i915/intel_pm.c:3597 skl_update_other_pipe_wm+0x1ba/0x1c0 [i915]()
[27190.667139] WARN_ON(!wm_changed)
[27190.667140] Modules linked in:
[27190.667141]  uas usb_storage fuse hid_generic hidp cmac ecb rfcomm af_packet bnep snd_hda_codec_hdmi dell_led snd_hda_codec_realtek snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel nls_iso8859_1 kvm_intel snd_hda_codec uvcvideo dell_laptop videobuf2_vmalloc dcdbas videobuf2_memops snd_hda_core i2c_designware_platform nls_cp437 snd_hwdep kvm videobuf2_v4l2 vfat irqbypass snd_pcm i2c_designware_core crct10dif_pclmul dell_wmi videobuf2_core sparse_keymap v4l2_common fat crc32_pclmul snd_timer brcmfmac brcmutil snd aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper btusb cryptd btrtl rtsx_pci_ms idma64 virt_dma pcspkr soundcore i2c_i801 videodev joydev cfg80211 memstick mei_me mei shpchp intel_lpss_pci processor_thermal_device intel_soc_dts_iosf hci_uart btbcm
[27190.667172]  btqca btintel pinctrl_sunrisepoint pinctrl_intel fan bluetooth thermal rfkill intel_lpss_acpi intel_lpss int3403_thermal int340x_thermal_zone int3400_thermal acpi_thermal_rel acpi_als kfifo_buf industrialio battery acpi_pad tpm_tis ac tpm hid_multitouch usbhid i915 rtsx_pci_sdmmc mmc_core crc32c_intel i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops rtsx_pci serio_raw xhci_pci xhci_hcd usbcore nvme mfd_core usb_common drm wmi i2c_hid video button fjes sg efivarfs
[27190.667193] CPU: 2 PID: 21375 Comm: X Tainted: G        W       4.4.0-3.g75554c0-default #1
[27190.667194] Hardware name: Dell Inc. XPS 13 9350/0VM5NC, BIOS 1.1.9 12/18/2015
[27190.667195]  ffffffffa0356c08 ffff880466bc77c8 ffffffff8137f639 ffff880466bc7810
[27190.667197]  ffff880466bc7800 ffffffff8107d132 ffff88046a766000 ffff880466bc792c
[27190.667199]  ffff88046a292000 0000000000000000 ffff880466bc7898 ffff880466bc7860
[27190.667200] Call Trace:
[27190.667208]  [<ffffffff8101a095>] try_stack_unwind+0x175/0x190
[27190.667212]  [<ffffffff81018fe9>] dump_trace+0x69/0x3a0
[27190.667215]  [<ffffffff8101a0fb>] show_trace_log_lvl+0x4b/0x60
[27190.667217]  [<ffffffff8101942c>] show_stack_log_lvl+0x10c/0x180
[27190.667219]  [<ffffffff8101a195>] show_stack+0x25/0x50
[27190.667226]  [<ffffffff8137f639>] dump_stack+0x4b/0x72
[27190.667234]  [<ffffffff8107d132>] warn_slowpath_common+0x82/0xc0
[27190.667237]  [<ffffffff8107d1bc>] warn_slowpath_fmt+0x4c/0x50
[27190.667246]  [<ffffffffa0293c1a>] skl_update_other_pipe_wm+0x1ba/0x1c0 [i915]
[27190.667256]  [<ffffffffa0293e52>] skl_update_wm+0x232/0x7a0 [i915]
[27190.667264]  [<ffffffffa02982ee>] intel_update_watermarks+0x1e/0x30 [i915]
[27190.667278]  [<ffffffffa02ff150>] haswell_crtc_enable+0x370/0x870 [i915]
[27190.667291]  [<ffffffffa02fc0f8>] intel_atomic_commit+0x448/0x6d0 [i915]
[27190.667305]  [<ffffffffa0088107>] drm_atomic_commit+0x37/0x60 [drm]
[27190.667311]  [<ffffffffa021bec6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
[27190.667320]  [<ffffffffa00776c2>] drm_mode_set_config_internal+0x62/0x100 [drm]
[27190.667328]  [<ffffffffa007bb5f>] drm_mode_setcrtc+0x3bf/0x4e0 [drm]
[27190.667334]  [<ffffffffa006d612>] drm_ioctl+0x152/0x540 [drm]
[27190.667338]  [<ffffffff8120e328>] do_vfs_ioctl+0x288/0x470
[27190.667342]  [<ffffffff8120e589>] SyS_ioctl+0x79/0x90
[27190.667346]  [<ffffffff816aa036>] entry_SYSCALL_64_fastpath+0x16/0x75
[27190.668400] DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x16/0x75

[27190.668402] Leftover inexact backtrace:

[27190.668404] ---[ end trace ca7a924b37d1024a ]---

(In reply to Alin M Elena from comment #4)
> with the logs may be tricky to get since when I get a black screen there is
> none.. and I have no network card on that machine.

Does your distro save the logs from previous boots?

A have a similar yet different problem, see bug 93950.

The laptop boots up just fine, but the screen dies if I restart the Xorg server.

Created attachment 121486 [details]
attachment-19919-0.html

with 4.5rc1 things seem to work.. .

Without Questions there are no Answers!
______________________________________________________________________
Dr. Alin Marin ELENA
http://alin.elena.space/ <http://alin.elenaworld.net/>
______________________________________________________________________

On 19 January 2016 at 11:03, <bugzilla-daemon@freedesktop.org> wrote:

> *Comment # 5 <https://bugs.freedesktop.org/show_bug.cgi?id=93741#c5> on
> bug 93741 <https://bugs.freedesktop.org/show_bug.cgi?id=93741> from Jani
> Nikula <jani.nikula@intel.com> *
>
> (In reply to Alin M Elena from comment #4 <https://bugs.freedesktop.org/show_bug.cgi?id=93741#c4>)> with the logs may be tricky to get since when I get a black screen there is
> > none.. and I have no network card on that machine.
>
> Does your distro save the logs from previous boots?
>
> ------------------------------
> You are receiving this mail because:
>
>    - You reported the bug.
>
>

(In reply to Alin M Elena from comment #7)
> with 4.5rc1 things seem to work.. .

Thanks, I think we'll settle with that. Closing.