Bug 92997

Summary:	[drm:intel_pipe_config_compare [i915]] ERROR mismatch in has_drrs (expected 1, found 0)
Product:	DRI	Reporter:	Yaroslav Halchenko <debian>
Component:	DRM/Intel	Assignee:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Status:	CLOSED DUPLICATE	QA Contact:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity:	normal
Priority:	medium	CC:	debian, intel-gfx-bugs
Version:	XOrg git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Yaroslav Halchenko 2015-11-18 18:47:00 UTC

The story began a month or so ago whenever I upgraded my Debian testing/sid installation with a new kernel (can dig out later if needed from which version) to 4.3.0 :  laptop started to freeze completely, usually when switching displays (to/from external display)/resolution.  My laptop is hp zbook 14" with dual GPU:

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M]

which sits on the docking station (stalls happen without docking I believe) which has a display connected via display port.

I now don't remember if I ever caught a clear traceback during a crash, but I believe that it was since the upgrade that I started getting the Subject message in the dmesg, then leading to tracebacks warning on the slowpath, e.g. from earlier today

Nov 18 13:29:58 hopa kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in has_drrs (expected 1, found 0)
Nov 18 13:29:58 hopa kernel: ------------[ cut here ]------------
Nov 18 13:29:58 hopa kernel: WARNING: CPU: 0 PID: 1377 at drivers/gpu/drm/i915/intel_display.c:12776 intel_atomic_commit+0xcc8/0x12e0 [i915]()
Nov 18 13:29:58 hopa kernel: pipe state doesn't match!
Nov 18 13:29:58 hopa kernel: Modules linked in: nls_utf8 ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs cpuid ctr ccm fuse rfcomm ipt_MASQUERADE nf_nat_masquerade_ipv4
Nov 18 13:29:58 hopa kernel:  intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm tpm_infineon pcspkr evdev psmouse serio_raw i2c_i801 sg lpc_ich 
Nov 18 13:29:58 hopa kernel:  sd_mod rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng aesn
Nov 18 13:29:58 hopa kernel: CPU: 0 PID: 1377 Comm: systemd-logind Tainted: G        W  O    4.3.0-rc7+ #1
Nov 18 13:29:58 hopa kernel: Hardware name: Hewlett-Packard HP ZBook 14/198F, BIOS L71 Ver. 01.20 07/28/2014
Nov 18 13:29:58 hopa kernel:  ffffffffa0959d08 ffffffff812c0209 ffff880036babab0 ffffffff8106eb2d
Nov 18 13:29:58 hopa kernel:  0000000000000000 ffff880036babb00 ffff880430c07000 ffff880437371350
Nov 18 13:29:58 hopa kernel:  ffff880437c15000 ffffffff8106ebac ffffffffa09695be ffff880400000018
Nov 18 13:29:58 hopa kernel: Call Trace:
Nov 18 13:29:58 hopa kernel:  [<ffffffff812c0209>] ? dump_stack+0x40/0x57
Nov 18 13:29:58 hopa kernel:  [<ffffffff8106eb2d>] ? warn_slowpath_common+0x7d/0xb0
Nov 18 13:29:58 hopa kernel:  [<ffffffff8106ebac>] ? warn_slowpath_fmt+0x4c/0x50
Nov 18 13:29:58 hopa kernel:  [<ffffffffa08f9e18>] ? intel_atomic_commit+0xcc8/0x12e0 [i915]
Nov 18 13:29:58 hopa kernel:  [<ffffffffa07fa452>] ? restore_fbdev_mode+0x282/0x2b0 [drm_kms_helper]
Nov 18 13:29:58 hopa kernel:  [<ffffffffa07fc52e>] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70 [drm_kms_helper]
Nov 18 13:29:58 hopa kernel:  [<ffffffffa09104ce>] ? intel_fbdev_restore_mode+0x1e/0x80 [i915]
Nov 18 13:29:58 hopa kernel:  [<ffffffffa093a0ca>] ? i915_driver_lastclose+0xa/0x10 [i915]
Nov 18 13:29:58 hopa kernel:  [<ffffffffa05b9789>] ? drm_lastclose+0x29/0x130 [drm]
Nov 18 13:29:58 hopa kernel:  [<ffffffffa05b9b33>] ? drm_release+0x2a3/0x480 [drm]
Nov 18 13:29:58 hopa kernel:  [<ffffffff811b96fa>] ? __fput+0xca/0x1d0
Nov 18 13:29:58 hopa kernel:  [<ffffffff810896b1>] ? task_work_run+0x71/0x90
Nov 18 13:29:58 hopa kernel:  [<ffffffff810715ee>] ? do_exit+0x38e/0xb00
Nov 18 13:29:58 hopa kernel:  [<ffffffff811546cf>] ? free_hot_cold_page_list+0x3f/0x90
Nov 18 13:29:58 hopa kernel:  [<ffffffff8109c9a7>] ? update_curr+0x57/0xf0
Nov 18 13:29:58 hopa kernel:  [<ffffffff81071dda>] ? do_group_exit+0x3a/0xa0
Nov 18 13:29:58 hopa kernel:  [<ffffffff8107c39c>] ? get_signal+0x27c/0x610
Nov 18 13:29:58 hopa kernel:  [<ffffffff810142b3>] ? do_signal+0x23/0x930
Nov 18 13:29:58 hopa kernel:  [<ffffffff812dba59>] ? list_del+0x9/0x30
Nov 18 13:29:58 hopa kernel:  [<ffffffff811fa60a>] ? ep_poll+0x34a/0x3b0
Nov 18 13:29:58 hopa kernel:  [<ffffffff81094ea0>] ? wake_up_q+0x60/0x60
Nov 18 13:29:58 hopa kernel:  [<ffffffff810039f7>] ? prepare_exit_to_usermode+0xb7/0xf0
Nov 18 13:29:58 hopa kernel:  [<ffffffff8154ce18>] ? int_ret_from_sys_call+0x25/0x8f
Nov 18 13:29:58 hopa kernel: ---[ end trace 290a14d1c92f36dc ]---

Today I have upgraded to yet another fresh nightly (was running the one based on 4.3.0-rc7 for a while with occasional stalls), with fix for the build from http://marc.info/?l=linux-kernel&m=144686213802377&q=raw , and upon reboot still got the same error and a traceback (boot continued seems to be normally):

Nov 18 13:31:14 hopa kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in has_drrs (expected 1, found 0)
Nov 18 13:31:14 hopa kernel: ------------[ cut here ]------------
Nov 18 13:31:14 hopa kernel: WARNING: CPU: 0 PID: 134 at drivers/gpu/drm/i915/intel_display.c:12858 intel_atomic_commit+0x1174/0x16a0 [i915]()
Nov 18 13:31:14 hopa kernel: pipe state doesn't match!
Nov 18 13:31:14 hopa kernel: Modules linked in: hp_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass pcspkr psmouse 
Nov 18 13:31:14 hopa kernel:  raid6_pq algif_skcipher af_alg hid_generic usbhid hid dm_crypt dm_mod sd_mod rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel j
Nov 18 13:31:14 hopa kernel: CPU: 0 PID: 134 Comm: kworker/u16:2 Tainted: G        W       4.4.0-rc1+ #2
Nov 18 13:31:14 hopa kernel: Hardware name: Hewlett-Packard HP ZBook 14/198F, BIOS L71 Ver. 01.20 07/28/2014
Nov 18 13:31:14 hopa kernel: Workqueue: events_unbound async_run_entry_fn
Nov 18 13:31:14 hopa kernel:  ffffffffa076b5c8 ffffffff812c5799 ffff880437c37a10 ffffffff8106f2bd
Nov 18 13:31:14 hopa kernel:  0000000000000000 ffff880437c37a60 ffff880439748340 ffff880439748348
Nov 18 13:31:14 hopa kernel:  ffff880437cb5000 ffffffff8106f33c ffffffffa077b03f ffffffff00000018
Nov 18 13:31:14 hopa kernel: Call Trace:
Nov 18 13:31:14 hopa kernel:  [<ffffffff812c5799>] ? dump_stack+0x40/0x57
Nov 18 13:31:14 hopa kernel:  [<ffffffff8106f2bd>] ? warn_slowpath_common+0x7d/0xb0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8106f33c>] ? warn_slowpath_fmt+0x4c/0x50
Nov 18 13:31:14 hopa kernel:  [<ffffffffa070a794>] ? intel_atomic_commit+0x1174/0x16a0 [i915]
Nov 18 13:31:14 hopa kernel:  [<ffffffffa05823b2>] ? drm_atomic_add_affected_connectors+0x22/0xe0 [drm]
Nov 18 13:31:14 hopa kernel:  [<ffffffffa0625443>] ? restore_fbdev_mode+0x223/0x250 [drm_kms_helper]
Nov 18 13:31:14 hopa kernel:  [<ffffffffa0581377>] ? drm_modeset_lock_all_crtcs+0x87/0xa0 [drm]
Nov 18 13:31:14 hopa kernel:  [<ffffffffa06274be>] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70 [drm_kms_helper]
Nov 18 13:31:14 hopa kernel:  [<ffffffffa0627529>] ? drm_fb_helper_set_par+0x29/0x50 [drm_kms_helper]
Nov 18 13:31:14 hopa kernel:  [<ffffffffa0720376>] ? intel_fbdev_set_par+0x16/0x60 [i915]
Nov 18 13:31:14 hopa kernel:  [<ffffffff81327dfd>] ? fbcon_init+0x54d/0x5e0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8139d523>] ? visual_init+0xc3/0x120
Nov 18 13:31:14 hopa kernel:  [<ffffffff8139f063>] ? do_bind_con_driver+0x1e3/0x3d0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8139f58b>] ? do_take_over_console+0x13b/0x190
Nov 18 13:31:14 hopa kernel:  [<ffffffff81323f03>] ? do_fbcon_takeover+0x53/0xb0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108c155>] ? notifier_call_chain+0x45/0x70
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108c441>] ? __blocking_notifier_call_chain+0x41/0x60
Nov 18 13:31:14 hopa kernel:  [<ffffffff8132fafb>] ? register_framebuffer+0x1fb/0x320
Nov 18 13:31:14 hopa kernel:  [<ffffffffa06277b7>] ? drm_fb_helper_initial_config+0x267/0x400 [drm_kms_helper]
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108d975>] ? async_run_entry_fn+0x45/0x130
Nov 18 13:31:14 hopa kernel:  [<ffffffff810856ff>] ? process_one_work+0x19f/0x3d0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108597d>] ? worker_thread+0x4d/0x450
Nov 18 13:31:14 hopa kernel:  [<ffffffff81085930>] ? process_one_work+0x3d0/0x3d0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108b47d>] ? kthread+0xbd/0xe0
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x170/0x170
Nov 18 13:31:14 hopa kernel:  [<ffffffff8155984f>] ? ret_from_fork+0x3f/0x70
Nov 18 13:31:14 hopa kernel:  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x170/0x170
Nov 18 13:31:14 hopa kernel: ---[ end trace 77e6a4f6c44fed2d ]---

Comment 1 Yaroslav Halchenko 2015-11-18 19:08:19 UTC

ok -- managed to trigger the stall again:  turned on 2nd display attached to the docking station (also via displayport), which xrandr doesn't actually see as connected, and usually it just shows the cloning of the 1st display (I guess docking station does it internally).  When I turned it off again, which lead X to reset display and almost come back when it stalled... after reboot journalctl -b -1 showed:

Nov 18 14:00:49 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) intel(0): resizing framebuffer to 1920x1200
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): EDID vendor "HWP", prod id 9977
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Using hsync ranges from config file
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Using vrefresh ranges from config file
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Printing DDC gathered Modelines:
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1920x1200"x0.0  154.00  1920 1968 2000 2080  1200 1203 1209 1235 +hsync -vsync (74.0 kHz eP)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "640x480"x0.0   31.50  640 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "640x480"x0.0   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "720x400"x0.0   28.32  720 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync (80.0 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1024x768"x0.0   78.75  1024 1040 1136 1312  768 769 772 800 +hsync +vsync (60.0 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "832x624"x0.0   57.28  832 864 928 1152  624 625 628 667 -hsync -vsync (49.7 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1152x864"x0.0  108.00  1152 1216 1344 1600  864 865 868 900 +hsync +vsync (67.5 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1280x960"x0.0  108.00  1280 1376 1488 1800  960 961 964 1000 +hsync +vsync (60.0 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1600x1000"x60.0  133.14  1600 1704 1872 2144  1000 1001 1004 1035 -hsync +vsync (62.1 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1600x1200"x0.0  162.00  1600 1664 1856 2160  1200 1201 1204 1250 +hsync +vsync (75.0 kHz e)
Nov 18 14:00:50 hopa /usr/lib/gdm3/gdm-x-session[2354]: (II) RADEON(G0): Modeline "1680x1050"x0.0  119.00  1680 1728 1760 1840  1050 1053 1059 1080 +hsync -vsync (64.7 kHz e)
Nov 18 14:00:50 hopa kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000041
Nov 18 14:00:50 hopa kernel: IP: [<ffffffffa089abeb>] ttm_bo_wait+0x6b/0x170 [ttm]
Nov 18 14:00:50 hopa kernel: PGD 35dba067 PUD 35dbb067 PMD 0 
Nov 18 14:00:50 hopa kernel: Oops: 0000 [#1] SMP 
Nov 18 14:00:50 hopa kernel: Modules linked in: fuse ctr ccm rfcomm ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_addrtype br_netfilter bridge stp llc dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio libcrc32c loop bnep pci_stub vboxpci(
Nov 18 14:00:50 hopa kernel:  iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass pcspkr psmouse serio_raw sg i2c_i801 lpc_ich shpchp evdev tpm_infineon mei_me mei snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_
Nov 18 14:00:50 hopa kernel:  sd_mod rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng ahci libahci aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_h
Nov 18 14:00:50 hopa kernel: CPU: 2 PID: 4571 Comm: kworker/2:0 Tainted: G        W  O    4.4.0-rc1+ #2
Nov 18 14:00:50 hopa kernel: Hardware name: Hewlett-Packard HP ZBook 14/198F, BIOS L71 Ver. 01.20 07/28/2014
Nov 18 14:00:50 hopa kernel: Workqueue: events ttm_bo_delayed_workqueue [ttm]
Nov 18 14:00:50 hopa kernel: task: ffff8804384d7100 ti: ffff880035e14000 task.ti: ffff880035e14000
Nov 18 14:00:50 hopa kernel: RIP: 0010:[<ffffffffa089abeb>]  [<ffffffffa089abeb>] ttm_bo_wait+0x6b/0x170 [ttm]
Nov 18 14:00:50 hopa kernel: RSP: 0018:ffff880035e17d70  EFLAGS: 00010246
Nov 18 14:00:50 hopa kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
Nov 18 14:00:50 hopa kernel: RDX: 0000000000000ea6 RSI: 0000000000000000 RDI: ffff8800a1626068
Nov 18 14:00:50 hopa kernel: RBP: 0000000000000001 R08: ffff8800a5c5cc78 R09: 0000000000000000
Nov 18 14:00:50 hopa kernel: R10: 0000000000000000 R11: ffff8804300f1dc0 R12: 0000000000000000
Nov 18 14:00:50 hopa kernel: R13: 0000000000000001 R14: ffff8804382d76f8 R15: ffff88031b9b6400
Nov 18 14:00:50 hopa kernel: FS:  0000000000000000(0000) GS:ffff88044ea80000(0000) knlGS:0000000000000000
Nov 18 14:00:50 hopa kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 18 14:00:50 hopa kernel: CR2: 0000000000000041 CR3: 000000043018d000 CR4: 00000000001406e0
Nov 18 14:00:50 hopa kernel: Stack:
Nov 18 14:00:50 hopa kernel:  0000000000000ea6 ffff8800a1626068 ffff88044ea959c0 ffff8800a1626068
Nov 18 14:00:50 hopa kernel:  0000000000000001 0000000000000001 ffff880437fcef40 0000000000000000
Nov 18 14:00:50 hopa kernel:  0000000000000001 ffffffffa089b327 0000000000000000 0000000000000001
Nov 18 14:00:50 hopa kernel: Call Trace:
Nov 18 14:00:50 hopa kernel:  [<ffffffffa089b327>] ? ttm_bo_cleanup_refs_and_unlock+0x27/0x170 [ttm]
Nov 18 14:00:50 hopa kernel:  [<ffffffffa089b52f>] ? ttm_bo_delayed_delete+0xbf/0x200 [ttm]
Nov 18 14:00:50 hopa kernel:  [<ffffffffa089b687>] ? ttm_bo_delayed_workqueue+0x17/0x40 [ttm]
Nov 18 14:00:50 hopa kernel:  [<ffffffff810856ff>] ? process_one_work+0x19f/0x3d0
Nov 18 14:00:50 hopa kernel:  [<ffffffff8108597d>] ? worker_thread+0x4d/0x450
Nov 18 14:00:50 hopa kernel:  [<ffffffff81085930>] ? process_one_work+0x3d0/0x3d0
Nov 18 14:00:50 hopa kernel:  [<ffffffff8108b47d>] ? kthread+0xbd/0xe0
Nov 18 14:00:50 hopa kernel:  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x170/0x170
Nov 18 14:00:50 hopa kernel:  [<ffffffff8155984f>] ? ret_from_fork+0x3f/0x70
Nov 18 14:00:50 hopa kernel:  [<ffffffff8108b3c0>] ? kthread_create_on_node+0x170/0x170
Nov 18 14:00:50 hopa kernel: Code: 85 ff 74 71 41 8b 47 10 ba a6 0e 00 00 85 c0 74 64 31 db eb 0e 83 c3 01 48 85 d2 7e 4f 41 39 5f 10 76 52 48 63 c3 49 8b 6c c7 18 <48> 8b 45 40 a8 01 75 e2 48 8b 45 08 48 8b 40 18 48 85 c0 74 11 
Nov 18 14:00:50 hopa kernel: RIP  [<ffffffffa089abeb>] ttm_bo_wait+0x6b/0x170 [ttm]

Comment 2 Jani Nikula 2015-11-19 10:54:22 UTC


*** This bug has been marked as a duplicate of bug 92456 ***

Comment 3 Yaroslav Halchenko 2015-11-19 14:19:06 UTC

Thanks for looking at this issue Jani, but as you might have noted it is also about the complete stall of the system, which is not what reported in 92456.  Warning seemed to be related, although it is not.  do you think I should file a separate report on the stall?

Thanks in advance for the guidance

Comment 4 Jani Nikula 2015-11-19 14:43:57 UTC

(In reply to Yaroslav Halchenko from comment #3)
> Thanks for looking at this issue Jani, but as you might have noted it is
> also about the complete stall of the system, which is not what reported in
> 92456.  Warning seemed to be related, although it is not.  do you think I
> should file a separate report on the stall?
> 
> Thanks in advance for the guidance

Yes please, one bug per report, and if you report an oops, don't hide it in a comment in bug about a state checker error!

Now that I look at the backtrace in comment #1, I don't think it's an i915 bug at all. We don't use ttm. Try Radeon.

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