This appears to be the related error message in the kernel log - please let me know if you need any further debugging:

[  110.404291] usb 1-5.3.1: Product: D6000 Controller
[  110.404293] usb 1-5.3.1: Manufacturer: Bizlink
[  110.404295] usb 1-5.3.1: SerialNumber: 206434465534
[  110.409855] hid-generic 0003:06C4:C411.000B: hiddev0,hidraw5: USB HID v1.11 Device [Bizlink D6000 Controller] on usb-0000:00:14.0-5.3.1/input0
[  110.817135] evdi: [D] evdi_painter_connect:557 (dev=2) Connected with ffff8802428ecc00
[  110.817142] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
[  111.845467] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
[  111.845476] evdi: [D] evdi_painter_get_edid_copy:215 (dev=2) 00 ff ff
[  111.905898] DrmThread[3481]: segfault at 40 ip 00005ad72ebe7d20 sp 00007d3a05b60a28 error 4 in chrome[5ad72e554000+997b000]
[  111.942424] evdi: [W] evdi_painter_disconnect:577 (dev=2) An unknown connection to ffff880073931200 tries to close us
[  111.942429] evdi: [W] evdi_painter_disconnect:578  - ignoring
[  112.766340] evdi: [D] evdi_painter_disconnect:594 (dev=2) Disconnected from ffff8802428ecc00
[  112.766347] evdi: [D] evdi_detect:79 (dev=2) Painter is disconnected
[  112.766438] evdi: [W] evdi_painter_disconnect:577 (dev=2) An unknown connection to ffff8802428ecc00 tries to close us
[  112.766440] evdi: [W] evdi_painter_disconnect:578  - ignoring
[  112.768464] evdi: [D] evdi_painter_connect:557 (dev=2) Connected with ffff88006a71a400
[  112.768471] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
[  112.801146] DrmThread[6688]: segfault at 71 ip 000058ccfb666a51 sp 00007bdf6e3afac0 error 4 in chrome[58ccfab80000+997b000]
[  112.989214] DrmThread[6725]: segfault at 71 ip 0000592e0631da51 sp 00007861f473cac0 error 4 in chrome[592e05837000+997b000]
[  113.259837] traps: Chrome_IOThread[3211] trap invalid opcode ip:56db7b39e713 sp:7ae065504db0 error:0 in chrome[56db785eb000+997b000]
[  113.439226] binder: undelivered death notification, 00000000eec9b880
[  113.521244] init: arc-kmsg-logger main process (3383) killed by TERM signal
[  113.525699] init: arc-removable-media main process (3876) killed by TERM signal
[  113.541027] init: arc-sdcard main process (3713) killed by TERM signal
[  113.748664] evdi: [D] evdi_painter_disconnect:594 (dev=2) Disconnected from ffff88006a71a400
[  113.748669] evdi: [D] evdi_detect:79 (dev=2) Painter is disconnected
[  113.748711] evdi: [W] evdi_painter_disconnect:577 (dev=2) An unknown connection to ffff88006a71a400 tries to close us
[  113.748713] evdi: [W] evdi_painter_disconnect:578  - ignoring
[  113.765494] evdi: [D] evdi_painter_connect:557 (dev=2) Connected with ffff88024252d000
[  113.765500] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
[  113.783317] arcbr0: port 1(veth_android) entered disabled state
[  113.785192] device veth_android left promiscuous mode
[  113.785195] arcbr0: port 1(veth_android) entered disabled state
[  114.573325] DrmThread[6898]: segfault at 71 ip 00005c88a51caa51 sp 00007e581b140ac0 error 4 in chrome[5c88a46e4000+997b000]

This is not limited to displaylink.  Connecting an HDMI monitor leads to the same crash.  However using a generic USB-C to HDMI adapter works fine. And DRM protected content even worked.
2018-08-29T12:56:10.924412-07:00 WARNING kernel: [  882.292615] evdi: [D] evdi_painter_connect:557 (dev=2) Connected with ffff880250e3fe00
2018-08-29T12:56:10.924440-07:00 WARNING kernel: [  882.292628] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
2018-08-29T12:56:11.954466-07:00 WARNING kernel: [  883.322915] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
2018-08-29T12:56:11.954497-07:00 WARNING kernel: [  883.322929] evdi: [D] evdi_painter_get_edid_copy:215 (dev=2) 00 ff ff
2018-08-29T12:56:12.033382-07:00 INFO kernel: [  883.401305] DrmThread[12588]: segfault at 40 ip 00005ce4659ded20 sp 000078bd8db260a8 error 4 in chrome[5ce46534b000+997b000]
2018-08-29T12:56:12.038532-07:00 INFO crash_reporter[14155]: libminijail[14155]: mount /dev/log -> /dev/log type ''
2018-08-29T12:56:12.051066-07:00 WARNING crash_reporter[14158]: Received crash notification for chrome[12579] user 1000 (called directly)
2018-08-29T12:56:12.052298-07:00 INFO crash_reporter[14158]: Accessing crash dir '/home/user/cfa504f2f51fdfb2206fbf8e90e428715e707fe6/crash' via symlinked handle '/proc/self/fd/6'
2018-08-29T12:56:12.052505-07:00 WARNING crash_reporter[14158]: Crash directory /home/user/cfa504f2f51fdfb2206fbf8e90e428715e707fe6/crash already full with 32 pending reports
2018-08-29T12:56:12.052529-07:00 ERR crash_reporter[14158]: Can't create crash directory for uid 1000
2018-08-29T12:56:12.053941-07:00 WARNING crash_reporter[14155]: [user] Received crash notification for chrome[12579] sig 11, user 1000 group 1000 (ignoring call by kernel - chrome crash; waiting for chrome to call us directly)
2018-08-29T12:56:12.054127-07:00 WARNING crash_reporter[14155]: [ARC] Received crash notification for chrome[12579] sig 11, user 1000 group 1000 (ignoring - crash origin is not ARC)
2018-08-29T12:56:12.066782-07:00 WARNING kernel: [  883.434727] evdi: [W] evdi_painter_disconnect:577 (dev=2) An unknown connection to ffff8802730e4400 tries to close us
2018-08-29T12:56:12.066796-07:00 WARNING kernel: [  883.434732] evdi: [W] evdi_painter_disconnect:578  - ignoring
2018-08-29T12:56:13.668436-07:00 INFO kernel: [  885.036837] Bluetooth: hci_core.c:skip_conditional_cmd()   COND LE cmd (0x200c) is already 0 (chg 0), skip transition to 0
2018-08-29T12:56:13.668474-07:00 INFO kernel: [  885.036853] Bluetooth: hci_core.c:skip_conditional_cmd()   COND call queue_work.
2018-08-29T12:56:14.041476-07:00 WARNING kernel: [  885.409425] evdi: [D] evdi_detect:76 (dev=2) Painter is connected
2018-08-29T12:56:14.041506-07:00 WARNING kernel: [  885.409440] evdi: [D] evdi_painter_get_edid_copy:215 (dev=2) 00 ff ff
2018-08-29T12:56:14.268384-07:00 INFO kernel: [  885.636365] DrmThread[14165]: segfault at 40 ip 00005c0c87836d20 sp 00007a48af4e10a8 error 4 in chrome[5c0c871a3000+997b000]

I'm experiencing the same issue with a Plugable UD-3900 displaylink hub connected to a Pixelbook running Version 70.0.3524.2. Both the chromebook and the hub are new, and I immediately switched to the dev channel, so I've never seen this configuration work.

However, I also have an Asus 301SA, and the UD-3900 worked fine with it, until that chromebook upgraded itself to version 70.

It looks like this issue is resolved in Version 70.0.3532.8 (Official Build) dev (64-bit).  The Displayport and HDMI are now working with the Dell D6000 dock.

Confirmed the issue is resolved with 70.0.3532.8 on Eve.