[Bug 71341] New: WARNING: CPU: 2 PID: 974 at drivers/gpu/drm/i915/intel_display.c:9457 intel_modeset_check_state+0x688/0x7d0 [i915]()

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=71341

            Bug ID: 71341
           Summary: WARNING: CPU: 2 PID: 974 at
                    drivers/gpu/drm/i915/intel_display.c:9457
                    intel_modeset_check_state+0x688/0x7d0 [i915]()
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.14.0-0.rc4.git0.1.fc21.x86_64
          Hardware: All
                OS: Linux
              Tree: Fedora
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: i.gnatenko.brain at gmail.com
                CC: i.gnatenko.brain at gmail.com,
                    intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 127741
  --> https://bugzilla.kernel.org/attachment.cgi?id=127741&action=edit
dmesg

Original report:
https://bugzilla.redhat.com/show_bug.cgi?id=1070009

I have ThinkPad X1 Carbon. I've plugged miniDP<->D-SUB adapter and connected
monitor over D-SUB. When I plug/unplug/reboot it's giving to me kerneloops.
Some of it I can't send, because they contains TAINED flag. BUT, one I've sent
to RHBZ

Additional info:
reporter:       libreport-2.1.12
WARNING: CPU: 2 PID: 974 at drivers/gpu/drm/i915/intel_display.c:9457
intel_modeset_check_state+0x688/0x7d0 [i915]()
encoder's hw state doesn't match sw tracking (expected 1, found 0)
Modules linked in: fuse ipt_MASQUERADE xt_CHECKSUM tun ip6t_rpfilter
ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc
ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6
nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter
ip6_tables bnep iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_conntrack iptable_mangle iptable_security iptable_raw iTCO_wdt
iTCO_vendor_support vfat fat x86_pkg_temp_thermal coretemp kvm_intel kvm
uvcvideo arc4 videobuf2_vmalloc videobuf2_memops iwldvm videobuf2_core videodev
crct10dif_pclmul crc32_pclmul mac80211 media btusb crc32c_intel bluetooth
cdc_mbim 6lowpan_iphc snd_hda_codec_hdmi iwlwifi ghash_clmulni_intel cdc_wdm
cdc_ncm cdc_acm snd_hda_codec_realtek sdhci_pci microcode sdhci
snd_hda_codec_generic cfg80211 mmc_core serio_raw snd_hda_intel snd_hda_codec
snd_hwdep snd_seq snd_seq_device wmi tpm_tis snd_pcm thinkpad_acpi tpm rfkill
snd_timer mei_me snd mei lpc_ich soundcore shpchp i2c_i801 mfd_core nfsd
auth_rpcgss nfs_acl lockd sunrpc asix usbnet mii i915 i2c_algo_bit
drm_kms_helper drm i2c_core video
CPU: 2 PID: 974 Comm: Xorg Not tainted 3.14.0-0.rc4.git0.1.fc21.x86_64 #1
Hardware name: LENOVO 3444FHG/3444FHG, BIOS G6ET96WW (2.56 ) 04/29/2013
 0000000000000000 00000000f108af91 ffff88021148f8d0 ffffffff816ed0d5
 ffff88021148f918 ffff88021148f908 ffffffff8108a06d 0000000000000001
 ffff88021148f998 ffff8800d4629ae8 ffff8802100cc000 ffff8800d4629800
Call Trace:
 [<ffffffff816ed0d5>] dump_stack+0x45/0x56
 [<ffffffff8108a06d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8108a0ec>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa00b0488>] intel_modeset_check_state+0x688/0x7d0 [i915]
 [<ffffffffa00b0665>] intel_set_mode+0x25/0x30 [i915]
 [<ffffffffa00b0f1b>] intel_crtc_set_config+0x7bb/0x990 [i915]
 [<ffffffffa0038a2d>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
 [<ffffffffa000af21>] drm_fb_helper_set_par+0x71/0xf0 [drm_kms_helper]
 [<ffffffff810bbcbc>] ? resched_task+0x4c/0x60
 [<ffffffff813b1847>] fb_set_var+0x197/0x440
 [<ffffffff810bc7e5>] ? check_preempt_curr+0x85/0xa0
 [<ffffffff810bc819>] ? ttwu_do_wakeup+0x19/0xc0
 [<ffffffff810bc96d>] ? ttwu_do_activate.constprop.95+0x5d/0x70
 [<ffffffff810c7d57>] ? update_curr+0x67/0x160
 [<ffffffff813bd2f1>] fbcon_blank+0x1f1/0x2f0
 [<ffffffff81436c28>] do_unblank_screen+0xb8/0x1f0
 [<ffffffff8142c7aa>] complete_change_console+0x5a/0xe0
 [<ffffffff8142d805>] vt_ioctl+0xfd5/0x1190
 [<ffffffff811a219c>] ? handle_mm_fault+0x65c/0xe50
 [<ffffffffa002c7f5>] ? drm_ioctl+0xf5/0x620 [drm]
 [<ffffffff81421279>] tty_ioctl+0x289/0xb80
 [<ffffffff816f7f64>] ? __do_page_fault+0x214/0x560
 [<ffffffff811fc180>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff811fc3e1>] SyS_ioctl+0xa1/0xc0
 [<ffffffff816fd4e9>] system_call_fastpath+0x16/0x1b

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