[Bug 97771] New: intel_dp.c trace / laptop lockup

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=97771

            Bug ID: 97771
           Summary: intel_dp.c trace / laptop lockup
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.1-rc2
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: vladi at aresgate.net
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Thinkpad x1 3rd generation haswell when display / external hdmi wake from sleep
display graphics start to flicker, when I try to restart system locks up and
requires hard power off.

P.S. also messages about CPU failed FIFO are seen after screen wake up in
dmesg.

this is seen at fresh reboot:
[    3.661294] ------------[ cut here ]------------
[    3.661301] WARNING: CPU: 1 PID: 791 at drivers/gpu/drm/i915/intel_dp.c:140
intel_dp_common_rates+0x13f/0x1d0()
[    3.661302] invalid max DP link bw val 0, using 1.62Gbps
[    3.661303] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops
videobuf2_core v4l2_common videodev arc4 nls_iso8859_1 nls_cp437 vfat fat
iwlmvm mac80211 iwlwifi snd_hda_codec_generic cfg80211 x86_pkg_temp_thermal
psmouse pcspkr snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
snd_hda_core snd_pcm snd_timer snd soundcore tcp_bic autofs4
[    3.661322] CPU: 1 PID: 791 Comm: X Not tainted 4.1.0-rc2+ #3
[    3.661323] Hardware name: LENOVO 20BSCTO1WW/20BSCTO1WW, BIOS N14ET28W (1.06
) 03/12/2015
[    3.661325]  0000000000000000 000000000000008c ffffffff81728a41
ffffffff8193f640
[    3.661327]  ffffffff810558ce ffffffff8193f818 ffff880000000020
ffff8800cb157a48
[    3.661329]  ffff8800cb1579f8 ffff880224bc4000 ffffffff81446e17
0000000000000000
[    3.661331] Call Trace:
[    3.661335]  [<ffffffff81728a41>] ? dump_stack+0x40/0x50
[    3.661346]  [<ffffffff810558ce>] ? warn_slowpath_fmt+0x9e/0x100
[    3.661350]  [<ffffffff81446e17>] ? drm_crtc_get_hv_timing+0x27/0x50
[    3.661352]  [<ffffffff81502daf>] ? intel_dp_common_rates+0x13f/0x1d0
[    3.661353]  [<ffffffff81502ef4>] ? intel_dp_compute_config+0xb4/0x840
[    3.661356]  [<ffffffff814d04fb>] ?
intel_modeset_compute_config+0x8eb/0x11d0
[    3.661358]  [<ffffffff814e1e8f>] ? intel_crtc_set_config+0x74f/0x1190
[    3.661360]  [<ffffffff814498d6>] ? drm_mode_set_config_internal+0x66/0x240
[    3.661362]  [<ffffffff8144fe0b>] ? drm_mode_setcrtc+0x30b/0x870
[    3.661364]  [<ffffffff8143cb5a>] ? drm_ioctl+0x15a/0x580
[    3.661367]  [<ffffffff8134ba88>] ? lockref_put_or_lock+0x48/0x80
[    3.661369]  [<ffffffff8108e7d3>] ? vtime_user_enter+0xd3/0x210
[    3.661371]  [<ffffffff811b60d5>] ? dput+0x155/0x220
[    3.661374]  [<ffffffff811b160d>] ? SyS_ioctl+0x31d/0x4d0
[    3.661376]  [<ffffffff81013325>] ? syscall_trace_enter_phase1+0x105/0x1f0
[    3.661378]  [<ffffffff8108e7d3>] ? vtime_user_enter+0xd3/0x210
[    3.661380]  [<ffffffff81730417>] ? system_call_fastpath+0x12/0x6a
[    3.661381] ---[ end trace 6b13bea88df0e446 ]---

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