[Bug 109078] Warning PID: 1150 at drivers/gpu/drm/i915/intel_cdclk.c:835

Mon Dec 17 16:14:08 UTC 2018

https://bugs.freedesktop.org/show_bug.cgi?id=109078

            Bug ID: 109078
           Summary: Warning PID: 1150 at
                    drivers/gpu/drm/i915/intel_cdclk.c:835
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: valerio.vanni at inwind.it
        QA Contact: intel-3d-bugs at lists.freedesktop.org

I have Debian stretch, with sysv init and vanilla kernel 4.19.9 (the same
happened with 4.18 kernels; I just updated to 4.19 to see if it fixed, but it
doesn't).

Machine is a Coffee Lake CPU (i8700) on an Asus Prime B306M-A motherboard.

Video driver in xorg.conf.d is modesetting.
In modprobe.d I have "options i915 enable_guc=3" "options i915 modeset=1"

Usually all goes fine.

Sometime I find the system on, with blank screen and no response to keyboard,
mouse, ping, telnet etc (I have to power off by the button).
Perhaps it's not related, I don't see anything (I have to fix my serial console
cable).

Some other times the system boots but I find this in dmesg:

[   26.731496] ------------[ cut here ]------------
[   26.827551] WARN_ON((val & ((1 << ((0) * 6 + 5)) | (1 << ((0) * 6 + 4)) | (1
<< ((0) * 6)))) != (1 << ((0) * 6)))
[   26.941236] WARNING: CPU: 1 PID: 1150 at
drivers/gpu/drm/i915/intel_cdclk.c:835 skl_get_cdclk+0x211/0x250 [i915]
[   26.941237] Modules linked in:
[   27.173871]  videobuf2_memops videobuf2_v4l2 kvm_intel snd_hwdep snd_pcm_oss
i915(+) kvm snd_mixer_oss
[   27.545801]  r8169 videodev xhci_pci snd_pcm iosf_mbi snd_timer libphy
xhci_hcd intel_gtt irqbypass videobuf2_common
[   27.728737]  pcspkr rtc_cmos video backlight evdev
[   27.728739] CPU: 1 PID: 1150 Comm: systemd-udevd Tainted: G     U           
4.19.9 #1
[   27.728740] Hardware name: System manufacturer System Product Name/PRIME
B360M-A, BIOS 1602 10/10/2018
[   27.963411] RIP: 0010:skl_get_cdclk+0x211/0x250 [i915]
[   27.963412] Code: a0 48 c7 c7 bc 2e ab a0 e8 7c b3 62 e0 0f 0b 8b 53 04 e9
35 fe ff ff 48 c7 c6 e8 5d ac a0 48 c7 c7 bc 2e ab a0 e8 5f b3 62 e0 <0f> 0b 8b
53 04 e9 18 fe ff ff 89 c2 48 c7 c6 0c 2f ab a0 48 c7 c7
[   28.527720] RSP: 0018:ffffc90000687ac8 EFLAGS: 00010286
[   28.574275] RAX: 0000000000000000 RBX: ffff88845654554c RCX:
0000000000000000
[   28.643540] RDX: 0000000000000001 RSI: 0000000000000092 RDI:
ffffffff82051bac
[   28.712811] RBP: ffff888456540000 R08: ffff88845df66280 R09:
0000000000000001
[   28.782077] R10: 0000000070000007 R11: 0000000000000000 R12:
0000000000000000
[   28.851344] R13: ffff8884565468f0 R14: ffff88845cb1c000 R15:
ffff8884565406b0
[   28.920620] FS:  00007f22acc9f8c0(0000) GS:ffff88846da40000(0000)
knlGS:0000000000000000
[   29.001250] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.054006] CR2: 00007f2510fca690 CR3: 000000045c5dc005 CR4:
00000000003606e0
[   29.123277] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   29.192552] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   29.261821] Call Trace:
[   29.275370]  intel_update_cdclk+0x17/0x60 [i915]
[   29.314803]  skl_init_cdclk+0x3d/0x1b0 [i915]
[   29.351037]  ? intel_power_well_enable+0x2f/0x40 [i915]
[   29.397601]  intel_power_domains_init_hw+0x771/0x990 [i915]
[   29.448292]  i915_driver_load+0x94a/0xf50 [i915]
[   29.487614]  pci_device_probe+0xa1/0x130
[   29.518688]  really_probe+0x230/0x2d0
[   29.546663]  driver_probe_device+0x4b/0xe0
[   29.579796]  __driver_attach+0xb4/0xc0
[   29.608799]  ? driver_probe_device+0xe0/0xe0
[   29.643998]  bus_for_each_dev+0x62/0xb0
[   29.674038]  bus_add_driver+0x10c/0x210
[   29.704079]  driver_register+0x56/0xe0
[   29.733086]  ? 0xffffffffa0b46000
[   29.756931]  do_one_initcall+0x43/0x1c0
[   29.786976]  ? __vunmap+0x75/0xb0
[   29.810824]  ? _cond_resched+0x11/0x40
[   29.839835]  do_init_module+0x56/0x1f0
[   29.868846]  load_module+0x1f72/0x25b0
[   29.897859]  ? vfs_read+0x114/0x130
[   29.923767]  ? __se_sys_finit_module+0xb3/0xc0
[   29.961037]  __se_sys_finit_module+0xb3/0xc0
[   29.996248]  do_syscall_64+0x43/0xf0
[   30.023191]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   30.067682] RIP: 0033:0x7f22abb5b229
[   30.094633] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 3f 4c 2b 00 f7 d8 64 89 01 48
[   30.302254] RSP: 002b:00007ffe9a7c9fd8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[   30.376693] RAX: ffffffffffffffda RBX: 0000557366cb0ab0 RCX:
00007f22abb5b229
[   30.445958] RDX: 0000000000000000 RSI: 0000557366caeaf0 RDI:
000000000000000e
[   30.515229] RBP: 0000557366caeaf0 R08: 0000000000000000 R09:
0000000000000016
[   30.584491] R10: 000000000000000e R11: 0000000000000246 R12:
0000000000000000
[   30.653753] R13: 0000557366cf1c70 R14: 0000000000020000 R15:
0000000000000000
[   30.723014] ---[ end trace e23c72a78f7a8889 ]---

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