Bug 88934

Summary: [ILK]unplug DP will cause dmesg error.
Product: DRI Reporter: Ding Heng <hengx.ding>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: christophe.prigent, intel-gfx-bugs
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: ILK i915 features: display/DP
Attachments:
Description Flags
dmesg none

Description Ding Heng 2015-02-03 06:55:34 UTC 
==System Environment==
--------------------------
Regression:  yes
will bisect later.

no-working platforms: ILK

==kernel==
--------------------------
drm-intel-testing/e0f77e2aeee065f8530ef87a9842fee5e89ea681

==Bug detailed description==
-----------------------------
start with eDP, and plug/unplug DP monitor will cause dmesg error.
[  241.744627] WARNING: CPU: 1 PID: 3717 at drivers/gpu/drm/drm_irq.c:1129 drm_wait_one_vblank+0x35/0x141 [drm]()
[  241.744831] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic firewire_ohci i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep lpc_ich mfd_core firewire_core crc_itu_t snd_pcm snd_timer bcma snd soundcore dm_mod parport_pc parport tpm_tis tpm wmi battery ac acpi_cpufreq joydev i915 button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea
[  241.745620] CPU: 1 PID: 3717 Comm: kworker/1:3 Tainted: G        W      3.19.0-rc6_drm-intel-testing_e0f77e_20150131_+ #150
[  241.746755]  [<f811b4ba>] ? drm_wait_one_vblank+0x35/0x141 [drm]
[  241.746973]  [<f811b4ba>] drm_wait_one_vblank+0x35/0x141 [drm]
[  241.748353]  [<f812ce6d>] ? kfree_state+0x42/0x45 [drm]
[  241.748626]  [<f812051b>] ? drm_mode_plane_set_obj_prop+0x47/0x5a [drm]
[  241.748691]  [<f81212a7>] drm_mode_set_config_internal+0x47/0xb2 [drm]
[  241.748804]  [<f80f66ab>] restore_fbdev_mode+0xa5/0xc4 [drm_kms_helper]
[  241.748927]  [<f80f77b5>] drm_fb_helper_restore_fbdev_mode_unlocked+0x1f/0x4c [drm_kms_helper]
[  241.749079]  [<f80f7812>] drm_fb_helper_set_par+0x30/0x34 [drm_kms_helper]
[  241.749207]  [<f80f778d>] drm_fb_helper_hotplug_event+0x92/0x9b [drm_kms_helper]
[  241.756648]  [<f80ef979>] drm_kms_helper_hotplug_event+0x21/0x24 [drm_kms_helper]


==Reproduce steps==
---------------------------- 
1. start with eDP
2. Plug DP monior.
3. Unplyg DP monitor.
4. Check dmesg.
Comment 1 Ding Heng 2015-02-03 06:56:46 UTC 
Created attachment 113089 [details]
dmesg
Comment 2 Ding Heng 2015-02-04 06:40:30 UTC 
Many DP testdisplay cases have similar warning in dmesg.
Comment 3 Ville Syrjala 2015-08-20 16:30:43 UTC 
I fixed a bunch of issues with PCH modeset sequence and ILK in particular. Are you still getting these with the latest nightly?
Comment 4 Jani Nikula 2016-06-17 15:24:10 UTC 
(In reply to Ville Syrjala from comment #3)
> I fixed a bunch of issues with PCH modeset sequence and ILK in particular.
> Are you still getting these with the latest nightly?

Presumed fixed. Please reopen if the problem persists with latest kernels.

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