[Bug 103766] New: DC6 already programmed to be enabled while screen saver

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Nov 15 17:09:27 UTC 2017 

https://bugs.freedesktop.org/show_bug.cgi?id=103766

            Bug ID: 103766
           Summary: DC6 already programmed to be enabled while screen
                    saver
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: sp31415s_bugreport at gmx.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 135497
  --> https://bugs.freedesktop.org/attachment.cgi?id=135497&action=edit
dmesg while funtional

Hi,
I'm using Debian Stretch (stable) with kernel from backport (4.12.13) on Kaby
Lake chip (i5-7600).
I got crash during screen saver.

extract from syslog :
Nov 15 16:33:36 lemon kernel: [10269.665458] DC6 already programmed to be
enabled.
Nov 15 16:33:36 lemon kernel: [10269.665480] ------------[ cut here
]------------
Nov 15 16:33:36 lemon kernel: [10269.665493] WARNING: CPU: 0 PID: 11235 at
/build/linux-RdeW6Z/linux-4.12.13/drivers/gpu/drm/i915/intel_runtime_pm.c:676
skl_enable_dc6+0x9e/0xb0 [i915]
Nov 15 16:33:36 lemon kernel: [10269.665493] Modules linked in: tun nls_ascii
nls_cp437 vfat fat intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel
kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmu
lni_intel intel_cstate mxm_wmi snd_hda_codec_hdmi intel_uncore
snd_hda_codec_realtek snd_hda_codec_generic intel_lpss_acpi snd_hda_intel
snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer intel_rapl_perf i9
15 intel_lpss mfd_core drm_kms_helper battery efi_pstore evdev snd efivars
serio_raw pcspkr iTCO_wdt iTCO_vendor_support wmi soundcore hci_uart sg btbcm
btqca btintel bluetooth ecdh_generic rfkill video acpi_pa
d button mei_me mei drm shpchp acpi_als kfifo_buf industrialio coretemp
parport_pc ppdev lp parport efivarfs ip_tables x_tables autofs4 ext4 crc16 jbd2
crc32c_generic fscrypto ecb mbcache sr_mod cdrom sd_mod hi
d_generic
Nov 15 16:33:36 lemon kernel: [10269.665513]  usbhid crc32c_intel aesni_intel
aes_x86_64 crypto_simd cryptd glue_helper ahci e1000e libahci i2c_i801 igb
i2c_algo_bit dca xhci_pci ptp pps_core libata xhci_hcd us
bcore scsi_mod usb_common fan thermal i2c_hid hid
Nov 15 16:33:36 lemon kernel: [10269.665520] CPU: 0 PID: 11235 Comm:
kworker/0:1 Not tainted 4.12.0-0.bpo.2-amd64 #1 Debian 4.12.13-1~bpo9+1
Nov 15 16:33:36 lemon kernel: [10269.665521] Hardware name: Gigabyte Technology
Co., Ltd. Z270X-UD5/Z270X-UD5-CF, BIOS F5 07/07/2017
Nov 15 16:33:36 lemon kernel: [10269.665532] Workqueue: events
i915_hotplug_work_func [i915]
Nov 15 16:33:36 lemon kernel: [10269.665532] task: ffff8c8c42881080 task.stack:
ffffb4f247cb8000
Nov 15 16:33:36 lemon kernel: [10269.665540] RIP: 0010:skl_enable_dc6+0x9e/0xb0
[i915]
Nov 15 16:33:36 lemon kernel: [10269.665541] RSP: 0018:ffffb4f247cbbd20 EFLAGS:
00010282
Nov 15 16:33:36 lemon kernel: [10269.665542] RAX: 0000000000000025 RBX:
ffff8c8ce9940000 RCX: 0000000000000000
Nov 15 16:33:36 lemon kernel: [10269.665542] RDX: 0000000000000000 RSI:
ffff8c8d0ec0dee8 RDI: ffff8c8d0ec0dee8
Nov 15 16:33:36 lemon kernel: [10269.665542] RBP: ffff8c8ce9944b58 R08:
0000000000000001 R09: 00000000000003d9
Nov 15 16:33:36 lemon kernel: [10269.665543] R10: 0000000000000040 R11:
00000000000003d9 R12: ffffffffc0916e68
Nov 15 16:33:36 lemon kernel: [10269.665543] R13: ffff8c8ce9940000 R14:
0000000080000000 R15: ffff8c8ce4b56000
Nov 15 16:33:36 lemon kernel: [10269.665544] FS:  0000000000000000(0000)
GS:ffff8c8d0ec00000(0000) knlGS:0000000000000000
Nov 15 16:33:36 lemon kernel: [10269.665544] CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Nov 15 16:33:36 lemon kernel: [10269.665545] CR2: 00007fdfb2515000 CR3:
00000007c2ecf000 CR4: 00000000003406f0
Nov 15 16:33:36 lemon kernel: [10269.665545] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Nov 15 16:33:36 lemon kernel: [10269.665545] DR3: 0000000000000000 DR6:
00000000fffe0ff0 DR7: 0000000000000400
Nov 15 16:33:36 lemon kernel: [10269.665546] Call Trace:
Nov 15 16:33:36 lemon kernel: [10269.665554]  ?
intel_display_power_put+0xb6/0x110 [i915]
Nov 15 16:33:36 lemon kernel: [10269.665564]  ? intel_dp_detect+0x1be/0x6d0
[i915]
Nov 15 16:33:36 lemon kernel: [10269.665567]  ?
drm_helper_probe_detect_ctx+0x41/0xd0 [drm_kms_helper]
Nov 15 16:33:36 lemon kernel: [10269.665576]  ?
i915_hotplug_work_func+0x1e1/0x2a0 [i915]
Nov 15 16:33:36 lemon kernel: [10269.665578]  ? process_one_work+0x181/0x370
Nov 15 16:33:36 lemon kernel: [10269.665579]  ? worker_thread+0x4d/0x3a0
Nov 15 16:33:36 lemon kernel: [10269.665580]  ? kthread+0xfc/0x130
Nov 15 16:33:36 lemon kernel: [10269.665580]  ? process_one_work+0x370/0x370
Nov 15 16:33:36 lemon kernel: [10269.665581]  ?
kthread_create_on_node+0x70/0x70
Nov 15 16:33:36 lemon kernel: [10269.665582]  ? ret_from_fork+0x25/0x30
Nov 15 16:33:36 lemon kernel: [10269.665583] Code: 05 1b 99 0e 00 01 e8 b8 53
73 cb 0f ff eb 9b 80 3d 0a 99 0e 00 00 75 a9 48 c7 c7 d0 6b 91 c0 c6 05 fa 98
0e 00 01 e8 98 53 73 cb <0f> ff eb 92 0f 1f 40 00 66 2
e 0f 1f 84 00 00 00 00 00 0f 1f 44 
Nov 15 16:33:36 lemon kernel: [10269.665595] ---[ end trace 8778ee3d58864911
]---
Nov 15 16:33:36 lemon kernel: [10269.665607] [drm:gen9_set_dc_state [i915]]
*ERROR* DC state mismatch (0x0 -> 0x2)

I also attached the dmesg from the next reboot.

I found some bug report with the same error message but not tthe same call
trace
Regards,
Serge

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