Debug logs and kcrash logs can be found here:

https://pantheon.corp.google.com/storage/browser/chromiumos-test-logs/bugfiles/cr/792033

In addition to the kcrash, both the internal and external displays show a lot of graphical distortion when entering and exiting docked mode (see screenshots uploaded to the link in #1).

From the kcrash log:
<5>[  111.217313] general protection fault: 0000 [#1] SMP 
<0>[  111.219751] gsmi: Log Shutdown Reason 0x03
<5>[  111.219784] Modules linked in: snd_usb_audio snd_usbmidi_lib rfcomm cmac uinput i2c_dev zram(C) zsmalloc(C) memconsole snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc fuse nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter snd_seq_midi ip6_tables snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer ath9k_btcoex ath9k_common_btcoex ath9k_hw_btcoex ath mac80211 cfg80211 ath3k btusb btrtl btbcm btintel uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_core joydev hid_plantronics
<5>[  111.220231] CPU 0 
<5>[  111.220254] Pid: 1254, comm: chrome Tainted: G        WC   3.8.11 #1
<5>[  111.220288] RIP: 0010:[<ffffffffb6cad7aa>]  [<ffffffffb6cad7aa>] list_move_tail+0x8/0x26
<5>[  111.220352] RSP: 0018:ffff880064587d50  EFLAGS: 00010282
<5>[  111.220375] RAX: dead000000200200 RBX: ffff88005ade3c00 RCX: 00000000000011ce
<5>[  111.220409] RDX: dead000000100100 RSI: ffff8800756aa5b0 RDI: ffff88005ade3cc8
<5>[  111.220441] RBP: ffff880064587d68 R08: 0000000000000010 R09: ffffffffb6caed00
<5>[  111.220473] R10: ffff880064587d50 R11: 0000000000000246 R12: ffff8800756a9ac0
<5>[  111.220500] R13: 00000000000011cd R14: ffff8800756a9ad0 R15: ffff880073bd9060
<5>[  111.220533] FS:  00007f948d2ae780(0000) GS:ffff880100200000(0000) knlGS:0000000000000000
<5>[  111.220568] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<5>[  111.220593] CR2: 00007f9486065000 CR3: 000000006461e000 CR4: 00000000000407f0
<5>[  111.220624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<5>[  111.220655] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<5>[  111.220690] Process chrome (pid: 1254, threadinfo ffff880064586000, task ffff880070a88000)
<5>[  111.220723] Stack:
<5>[  111.220739]  ffff880064587d68 ffffffffb6cade08 ffff8800756a99e8 ffff880064587db0
<5>[  111.220787]  ffffffffb6caed2d ffff880064587d88 ffff88003f7d3a80 ffff88005ade2800
<5>[  111.220839]  0000000000000000 ffff88010004f000 ffff880064587e08 ffff880064587e08
<5>[  111.220889] Call Trace:
<5>[  111.220916]  [<ffffffffb6cade08>] ? i915_gem_object_move_to_inactive+0x3e/0xb1
<5>[  111.220952]  [<ffffffffb6caed2d>] i915_gem_retire_requests_ring+0x159/0x181
<5>[  111.220993]  [<ffffffffb6cb1af1>] i915_gem_busy_ioctl+0x6d/0xbb
<5>[  111.221023]  [<ffffffffb6cb1a84>] ? i915_gem_unpin_ioctl+0xa9/0xa9
<5>[  111.221063]  [<ffffffffb6c833d3>] drm_ioctl+0x2fb/0x3e5
<5>[  111.221113]  [<ffffffffb6a918e6>] ? __secure_computing+0xd2/0x2b1
<5>[  111.221160]  [<ffffffffb6b049e7>] do_vfs_ioctl+0x35e/0x420
<5>[  111.221204]  [<ffffffffb6ed0e37>] ? _raw_spin_unlock_irq+0xe/0x11
<5>[  111.221254]  [<ffffffffb6a5c2bf>] ? finish_task_switch+0x63/0xa1
<5>[  111.221286]  [<ffffffffb6b04b16>] sys_ioctl+0x6d/0xa5
<5>[  111.221313]  [<ffffffffb6ed1d79>] tracesys+0xd0/0xd5
<5>[  111.221337] Code: df 48 8b 7d c8 e8 ad 12 22 00 48 89 df e8 a3 2c 03 00 48 83 c4 30 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 8b 47 08 48 8b 17 55 <48> 89 42 08 48 89 10 48 89 e5 48 8b 46 08 48 89 7e 08 48 89 37 
<1>[  111.221715] RIP  [<ffffffffb6cad7aa>] list_move_tail+0x8/0x26
<5>[  111.221752]  RSP <ffff880064587d50>
<4>[  111.221842] ---[ end trace 7c6c6bb5ef6d9f5e ]---

I've also tested on R64-10176.5.0 and the kcrash happens less often but the distortion happens very often.

Matt, can you post the crashes URLs?

Here is the link to the 6 or so crashes that were uploaded:

https://crash.corp.google.com/browse?q=ClientID%3D%2791096f8c139245e28d366d759d3ebbe4%27&sql_dialect=googlesql&ignore_case=false&enable_rewrite=true&omit_field_name=&omit_field_value=&omit_field_opt=%3D&stbtiq=&reportid=72a74e24061e32a5&index=4#0

just tried on falco, repro 0/5.

Can we identify an owner and bump in priority? Tagged as a stable blocker, but really with an edge workflow and board limited?

This crash seems related to one already fixed here issue 783208
+Brian to confirm 

Hrm, what? The crash linked doesn't seem related to this bug's $subject. It's also on 10176.5.0, which is an earlier build than the M64 build where bug 783208 was fixed. Please try 10176.18.0 or newer for fixing the cups/upstart bug.

But anyway, the graphics issues are likely from crash 2 of 7, like this one:

https://crash.corp.google.com/browse?q=ClientID%3D%2791096f8c139245e28d366d759d3ebbe4%27&sql_dialect=googlesql&ignore_case=false&enable_rewrite=true&omit_field_name=&omit_field_value=&omit_field_opt=%3D&stbtiq=&reportid=862cddaddeab67dd&index=1#0

This ain't my area of expertise...

Actually, I'd probably suggest the reporter retest, if possible, given marcheu@ couldn't repro, and you're also reporting other crashes that are already fixed :)

Issue appears to be resolved as I'm unable to repro on R64-10176.58.0 after entering and exiting Docked mode ~20 times.