[Bug 95040] dock and undock events error i915 driver stack trace dell e5440

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95040

--- Comment #17 from Leon Romanovsky <leon at leon.nu> ---
Hi,

I wanted to update that the same behaviour as described occurs to me with
Lenovo x250 notebook connected to Lenovo docking station.

I'm running Ubuntu with kernel - 3.19.0-58-generic.

>From dmesg, after dock event:

[201906.232595] ------------[ cut here ]------------
[201906.232805] WARNING: CPU: 0 PID: 914 at
/build/linux-vsDcAK/linux-3.19.0/ubuntu/i915/intel_ddi.c:603
intel_ddi_get_crtc_new_encoder+0x9d/0xb0 [i915_bpo]()
[201906.232808] 2 encoders on crtc for pipe B
[201906.232811] Modules linked in: ctr ccm xt_CHECKSUM iptable_mangle
ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_
reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter
ip6_tables vmnet(OE) iptable_filter ip_tables x_tables vmw_vsock_vmci_transport
vsock vmw_vmci vmmon(OE) rfcomm bnep hid_generic usbhid
 hid snd_usb_audio snd_usbmidi_lib uvcvideo videobuf2_vmalloc videobuf2_memops
videobuf2_core v4l2_common videodev media btusb bluetooth snd_hda_codec_hdmi
arc4 intel_rapl iosf_mbi snd_hda_codec_realtek joydev x8
6_pkg_temp_thermal snd_hda_codec_generic intel_powerclamp coretemp kvm_intel
kvm iwlmvm crct10dif_pclmul mac80211 crc32_pclmul aesni_intel dm_multipath
scsi_dh aes_x86_64 lrw
[201906.232860]  gf128mul glue_helper ablk_helper cryptd snd_seq_midi serio_raw
snd_seq_midi_event thinkpad_acpi nvram i915_bpo snd_hda_intel rtsx_pci_ms
iwlwifi snd_hda_controller snd_hda_codec lpc_ich memstick 
snd_hwdep cfg80211 snd_pcm intel_ips snd_rawmidi mei_me drm_kms_helper mei
snd_seq drm shpchp snd_seq_device i2c_algo_bit snd_timer snd wmi soundcore
video mac_hid parport_pc ppdev sunrpc lp parport autofs4 rtsx_
pci_sdmmc e1000e psmouse ahci ptp rtsx_pci libahci pps_core
[201906.232911] CPU: 0 PID: 914 Comm: Xorg Tainted: G        W  OE 
3.19.0-58-generic #64-Ubuntu
[201906.232915] Hardware name: LENOVO 20CMS02700/20CMS02700, BIOS N10ET42W
(1.21 ) 02/26/2016
[201906.232917]  0000000000000000 ffff8802228739d8 ffffffff817cc897
ffff880222873a28
[201906.232921]  ffffffffc07063a0 ffff880222873a18 ffffffff81077bfa
0000000000000000
[201906.232923]  ffff88022150d100 ffff880221b47000 ffff88020a09d840
0000000000000001
[201906.232928] Call Trace:
[201906.232945]  [<ffffffff817cc897>] dump_stack+0x63/0x81
[201906.232957]  [<ffffffff81077bfa>] warn_slowpath_common+0x8a/0xc0
[201906.232960]  [<ffffffff81077c76>] warn_slowpath_fmt+0x46/0x50
[201906.233028]  [<ffffffffc06bc10d>] intel_ddi_get_crtc_new_encoder+0x9d/0xb0
[i915_bpo]
[201906.233060]  [<ffffffffc06bc7c5>] intel_ddi_pll_select+0x35/0xf20
[i915_bpo]
[201906.233072]  [<ffffffff811dc8b5>] ? __kmalloc_track_caller+0x1c5/0x290
[201906.233106]  [<ffffffffc06a01cf>] ? intel_link_compute_m_n+0x4f/0x60
[i915_bpo]
[201906.233147]  [<ffffffffc069e6dd>] ? __intel_set_mode+0x11d/0xbd0 [i915_bpo]
[201906.233179]  [<ffffffffc068e4b6>] haswell_crtc_compute_clock+0x16/0x40
[i915_bpo]
[201906.233213]  [<ffffffffc069edfb>] __intel_set_mode+0x83b/0xbd0 [i915_bpo]
[201906.233305]  [<ffffffffc03be84d>] ? drm_atomic_set_fb_for_plane+0x2d/0x90
[drm]
[201906.233353]  [<ffffffffc06a610b>] intel_crtc_set_config+0x2eb/0x5d0
[i915_bpo]
[201906.233360]  [<ffffffff817d15c6>] ? mutex_lock+0x16/0x40
[201906.233397]  [<ffffffffc03adbb6>] drm_mode_set_config_internal+0x66/0x100
[drm]
[201906.233424]  [<ffffffffc03b226b>] drm_mode_setcrtc+0x25b/0x5a0 [drm]
[201906.233449]  [<ffffffffc03a2acf>] drm_ioctl+0x1df/0x680 [drm]
[201906.233461]  [<ffffffff8120c2c0>] do_vfs_ioctl+0x2e0/0x4e0
[201906.233466]  [<ffffffff811f9ea8>] ? __sb_end_write+0x38/0x70
[201906.233473]  [<ffffffff811f7912>] ? vfs_write+0x1b2/0x1f0
[201906.233482]  [<ffffffff817ceaec>] ? __schedule+0x39c/0x930
[201906.233484]  [<ffffffff8120c541>] SyS_ioctl+0x81/0xa0
[201906.233488]  [<ffffffff817d3acd>] system_call_fastpath+0x16/0x1b
[201906.233551] ---[ end trace ce718d8b3a3d9142 ]---

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