[Intel-gfx] [Eaglelake][i915] pipe state doesn't match

[Felix Miata]

I looked for a match on https://bugs.freedesktop.org/query.cgi but found
nothing looking like a close match that hadn't been marked fixed or
duplicate.

This is happening on a Dell Optiplex 780 in every openSUSE boot at least
as far back as kernel 3.16 in v13.2, but is not evident in v13.1 running
3.12.59. It's also evident in Knoppix 7.6.1 & kernel 4.2.6. This is full
dmesg from Tumbleweed's kernel 4.6.3, vaapi-intel-driver-1.7.0 and
libdrm2-2.4.68/libdrm_intel1-2.4.68, with the following cmdline:
audit=0 ipv6.disable=1 net.ifnames=0 noresume splash=0 vga=791 video=1024x768 at 60 video=1440x900 at 60 3 
http://fm.no-ip.com/Tmp/SUSE/Factory/dmsg-gx780-tw20160710-k4631.txt

Dmesg excerpt:
[   11.571101] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in has_audio (expected 1, found 0)
[   11.571102] ------------[ cut here ]------------
[   11.571128] WARNING: CPU: 0 PID: 71 at ../drivers/gpu/drm/i915/intel_display.c:12921 intel_modeset_check_state+0x6b6/0x840 [i915]
[   11.571129] pipe state doesn't match!
[   11.571149] Modules linked in: snd_hda_core snd_hwdep mei_wdt snd_pcm i915 snd_timer drm_kms_helper dm_mod snd mei_me drm e1000e fb_sys_fops mei coretemp kvm_intel kvm dell_wmi ptp sparse_keymap acpi_cpufreq dell_smbios video ppdev tpm_tis syscopyarea button iTCO_wdt tpm shpchp parport_pc gpio_ich sysfillrect dcdbas parport wmi iTCO_vendor_support sysimgblt pps_core i2c_i801 floppy(+) lpc_ich mfd_core irqbypass soundcore i2c_algo_bit 8250_fintek pcspkr hid_generic usbhid uhci_hcd ehci_pci ehci_hcd serio_raw sr_mod cdrom usbcore usb_common ata_generic sg
[   11.571151] CPU: 0 PID: 71 Comm: kworker/u16:6 Not tainted 4.6.3-1-default #1
[   11.571152] Hardware name: Dell Inc. OptiPlex 780                 /03NVJ6, BIOS A14 08/21/2012
[   11.571155] Workqueue: events_unbound async_run_entry_fn
[   11.571157]  0000000000000000 ffffffff8138a6f4 ffff8800d7b83988 0000000000000000
[   11.571158]  ffffffff8107b10e ffff8800d4f7b800 ffff8800d7b839d8 ffff880112574000
[   11.571159]  ffff880112a00c00 ffff8800d3734400 ffff8800d7b24000 ffffffff8107b17f
[   11.571160] Call Trace:
[   11.571168]  [<ffffffff8102eece>] dump_trace+0x5e/0x300
[   11.571171]  [<ffffffff8102f27c>] show_stack_log_lvl+0x10c/0x180
[   11.571173]  [<ffffffff8102ffa1>] show_stack+0x21/0x40
[   11.571175]  [<ffffffff8138a6f4>] dump_stack+0x5c/0x78
[   11.571178]  [<ffffffff8107b10e>] __warn+0xbe/0xe0
[   11.571180]  [<ffffffff8107b17f>] warn_slowpath_fmt+0x4f/0x60
[   11.571206]  [<ffffffffa0461236>] intel_modeset_check_state+0x6b6/0x840 [i915]
[   11.571240]  [<ffffffffa046c2a2>] intel_atomic_commit+0x832/0xc50 [i915]
[   11.571252]  [<ffffffffa03d586c>] restore_fbdev_mode+0x22c/0x260 [drm_kms_helper]
[   11.571261]  [<ffffffffa03d790e>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70 [drm_kms_helper]
[   11.571267]  [<ffffffffa03d7979>] drm_fb_helper_set_par+0x29/0x50 [drm_kms_helper]
[   11.571293]  [<ffffffffa0481376>] intel_fbdev_set_par+0x16/0x60 [i915]
[   11.571297]  [<ffffffff813f9f43>] fbcon_init+0x563/0x5f0
[   11.571301]  [<ffffffff81485f73>] visual_init+0xc3/0x120
[   11.571303]  [<ffffffff8148770f>] do_bind_con_driver+0x1cf/0x3b0
[   11.571305]  [<ffffffff81487c5e>] do_take_over_console+0x14e/0x1c0
[   11.571308]  [<ffffffff813f5f88>] do_fbcon_takeover+0x58/0xb0
[   11.571311]  [<ffffffff8109a525>] notifier_call_chain+0x45/0x70
[   11.571313]  [<ffffffff8109a871>] __blocking_notifier_call_chain+0x41/0x60
[   11.571315]  [<ffffffff81401cc2>] register_framebuffer+0x202/0x330
[   11.571322]  [<ffffffffa03d7c0c>] drm_fb_helper_initial_config+0x26c/0x420 [drm_kms_helper]
[   11.571348]  [<ffffffffa0481eeb>] intel_fbdev_initial_config+0x1b/0x30 [i915]
[   11.571350]  [<ffffffff8109be43>] async_run_entry_fn+0x43/0x140
[   11.571352]  [<ffffffff810938ed>] process_one_work+0x1ed/0x4b0
[   11.571354]  [<ffffffff81093bf7>] worker_thread+0x47/0x4c0
[   11.571357]  [<ffffffff810997ed>] kthread+0xbd/0xe0
[   11.571360]  [<ffffffff816b4062>] ret_from_fork+0x22/0x40
[   11.572001] DWARF2 unwinder stuck at ret_from_fork+0x22/0x40
[   11.572001] Leftover inexact backtrace:
[   11.572001]  [<ffffffff81099730>] ? kthread_worker_fn+0x170/0x170
[   11.572932] ---[ end trace a60da7830c1f6140 ]---
[   11.653070] Console: switching to colour frame buffer device 180x56
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/