Re: Call trace on SKL with 4.3.0-rc3+ kernel

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On 27/10/2015 10:40, Jani Nikula wrote:
> On Tue, 27 Oct 2015, Kai Huang <kai.huang@xxxxxxxxxxxxxxx> wrote:
>> I got below Call Trace when booting my 4.3.0-rc3+ kernel on my SKL DT 
>> machine. Although my machine boots up despite this call trace, I think 
>> it's better to report it (and hopefully this is the right mailing list 
>> to report).
> 
> Please try v4.3-rc7. If that doesn't help, please file a bug at
> https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
> 
> BR,
> Jani.
> 
Hi,
I'm testing 4.3-rc7 and got a similar crash (i7-6700k on z170), the
machine fails to boot.

[    5.063912] ------------[ cut here ]------------
[    5.063941] WARNING: CPU: 1 PID: 6 at
/home/user/n/qubes-builder/qubes-src/linux-kernel/kernel-4.3.0/linux-4.3.0/drivers/gpu/drm/i915/intel_pm.c:3668
skl_update_other_pipe_wm+0x1f3/0x200)
[    5.063942] WARN_ON(!wm_changed)
[    5.063950] Modules linked in: crct10dif_pclmul crc32_pclmul
crc32c_intel nouveau(+) mxm_wmi radeon(+) i915 intel_gtt i2c_algo_bit
drm_kms_helper ttm drm agpgart wmi video xen_pciback xek
[    5.063951] CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted
4.3.0-1.pvops.qubes.x86_64 #1
[    5.063952] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./Z170 Extreme4, BIOS P2.10 10/14/2015
[    5.063958] Workqueue: events_unbound async_run_entry_fn
[    5.063960]  0000000000000000 00000000624b15e0 ffff88086bb67400
ffffffff81394b54
[    5.063964]  ffff88086bb67448 ffff88086bb67438 ffffffff8109ced2
ffff8808677f8000
[    5.063965]  ffff88086bb67594 ffff88086bb674e0 ffff8808677fb000
0000000000000000
[    5.063965] Call Trace:
[    5.063972]  [<ffffffff81394b54>] dump_stack+0x44/0x60
[    5.063975]  [<ffffffff8109ced2>] warn_slowpath_common+0x82/0xc0
[    5.063976]  [<ffffffff8109cf6c>] warn_slowpath_fmt+0x5c/0x80
[    5.063997]  [<ffffffffa015f9f3>]
skl_update_other_pipe_wm+0x1f3/0x200 [i915]
[    5.064013]  [<ffffffffa015fbbb>] skl_update_wm+0x1bb/0x700 [i915]
[    5.064028]  [<ffffffff8172dae9>] ? error_exit+0x9/0x20
[    5.064044]  [<ffffffffa01610be>] intel_update_watermarks+0x1e/0x30
[i915]
[    5.064073]  [<ffffffffa01c0f46>] haswell_crtc_enable+0x476/0xbd0 [i915]
[    5.064098]  [<ffffffffa01bdeef>] intel_atomic_commit+0x36f/0x630 [i915]
[    5.064114]  [<ffffffffa0068e24>] ? drm_atomic_check_only+0x1d4/0x570
[drm]
[    5.064128]  [<ffffffffa00691f7>] drm_atomic_commit+0x37/0x60 [drm]
[    5.064135]  [<ffffffffa00f09d4>]
drm_atomic_helper_set_config+0x1c4/0x430 [drm_kms_helper]
[    5.064144]  [<ffffffffa0059052>]
drm_mode_set_config_internal+0x62/0x100 [drm]
[    5.064151]  [<ffffffffa00f37eb>] restore_fbdev_mode+0xab/0x110
[drm_kms_helper]
[    5.064157]  [<ffffffffa00f5685>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x25/0x70 [drm_kms_helper]
[    5.064159]  [<ffffffffa00f56fd>] drm_fb_helper_set_par+0x2d/0x50
[drm_kms_helper]
[    5.064188]  [<ffffffffa01d20ea>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    5.064190]  [<ffffffff81401cd3>] fbcon_init+0x533/0x5a0
[    5.064195]  [<ffffffff814837ca>] visual_init+0xca/0x130
[    5.064196]  [<ffffffff81485ec8>] do_bind_con_driver+0x168/0x390
[    5.064197]  [<ffffffff8148639c>] do_take_over_console+0xac/0x1a0
[    5.064198]  [<ffffffff813fcef7>] do_fbcon_takeover+0x57/0xb0
[    5.064199]  [<ffffffff81402746>] fbcon_event_notify+0x646/0x740
[    5.064204]  [<ffffffff810bbbca>] notifier_call_chain+0x4a/0x70
[    5.064205]  [<ffffffff810bbf07>]
__blocking_notifier_call_chain+0x47/0x60
[    5.064206]  [<ffffffff810bbf36>] blocking_notifier_call_chain+0x16/0x20
[    5.064211]  [<ffffffff814082cb>] fb_notifier_call_chain+0x1b/0x20
[    5.064211]  [<ffffffff8140a449>] register_framebuffer+0x209/0x340
[    5.064214]  [<ffffffffa00f5959>]
drm_fb_helper_initial_config+0x239/0x3c0 [drm_kms_helper]
[    5.064241]  [<ffffffffa01d31fb>]
intel_fbdev_initial_config+0x1b/0x20 [i915]
[    5.064242]  [<ffffffff810bd5da>] async_run_entry_fn+0x4a/0x140
[    5.064243]  [<ffffffff810b4d30>] process_one_work+0x150/0x3f0
[    5.064244]  [<ffffffff810b595e>] worker_thread+0x4e/0x460
[    5.064248]  [<ffffffff810b5910>] ? rescuer_thread+0x300/0x300
[    5.064249]  [<ffffffff810bab78>] kthread+0xd8/0xf0
[    5.064250]  [<ffffffff810baaa0>] ? kthread_park+0x60/0x60
[    5.064251]  [<ffffffff8172ba1f>] ret_from_fork+0x3f/0x70
[    5.064256]  [<ffffffff810baaa0>] ? kthread_park+0x60/0x60
[    5.064256] ---[ end trace 18eaeb20a49fdf89 ]---

John.
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