apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1752165/+attachment/5065234/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Attachment removed: "WifiSyslog.txt"
https://bugs.launchpad.net/dell-sputnik/+bug/1752165/+attachment/5065234/+files/WifiSyslog.txt
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https://bugs.launchpad.net/bugs/1752165
Title:
TB16 dock freezes X on hotplug when used with external displays
Status in Dell Sputnik:
New
Status in linux package in Ubuntu:
Confirmed
Bug description:
Precision 5520 with Quadro GPU. Latest Ubuntu 16.04, kernel Linux
REDACTED 4.13.0-36-generic #40~16.04.1-Ubuntu SMP Fri Feb 16 23:25:58
UTC 2018 x86_64 x86_64 x86_64 GNU/Linux, latest BIOS 1.7.0 released
12/15/2017. If it can be of any help, I can get this tested on an XPS
9560 (GTX 1050) too.
Steps to reproduce:
1. Plug in monitors into DP and miniDP on the dock. In my case, DP-to-DVI
cables are used, but I doubt that it matters.
2. Ubuntu 16.04 GNOME + nVidia drivers with PRIME.
3. Select nVidia GPU in PRIME settings, reboot if needed.
4. Either boot with the dock connected or connect it after booting into user
session.
5. Set up monitors if necessary. At this point everything should be working
fine.
6. Disconnect the dock, give it a moment to adjust to the new window layout
etc.
7. Re-connect the dock. Within a few seconds laptop screen should freeze and
external monitors should remain blank, as if not connected.
8. Disconnect the dock. Within a few seconds laptop screen should unfreeze.
There is a small chance that it won't if you repeat this procedure multiple
times.
Errors in dmesg indicate that i915 driver is somehow involved:
[ 328.966128] [drm:intel_dp_set_idle_link_train [i915]] *ERROR* Timed out
waiting for DP idle patterns
[ 328.967848] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF B idle bit
[ 329.048839] [drm:intel_dp_set_idle_link_train [i915]] *ERROR* Timed out
waiting for DP idle patterns
[ 329.050547] [drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting
for DDI BUF C idle bit
The kernel logs are flooded with these between steps 7 and 8 above.
This behaviour does not occur when Intel GPU is selected in PRIME
settings or when nouveau is used. However, nouveau performance leaves
a lot to be desired, particularly with 3D acceleration in Windows 10
VMs.
I have tried nvidia_drm.modeset=1 in boot options, but it doesn't make
any difference.
Other reports that may be related:
https://devtalk.nvidia.com/default/topic/989704/linux/plugging-a
-docking-station-w-two-monitors-into-a-quadro-m1000m-laptop-crashes-
hangs-the-whole-machine/ - same error messages
https://www.reddit.com/r/Dell/comments/5nas3t/tb16_dock_with_5510_ubuntulinux/ddzjlu8/?st=je63h7lw&sh=40bf8189
- "Connecting and disconnecting the TB16 sometimes freeze the laptop."
https://www.dell.com/community/Sputnik/TB16-Dock-Linux-Support/m-p/5109128/highlight/true#M7466
- "Hot-plugging the screen does not work."
---
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gboiko 2491 F.... pulseaudio
CurrentDesktop: GNOME
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=08bba264-8658-442f-995d-6a745925ac6c
InstallationDate: Installed on 2017-10-01 (149 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.3 LTS "Xenial Xerus" - Release amd64
(20170801)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 04f3:24a1 Elan Microelectronics Corp.
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 004: ID 1bcf:2b95 Sunplus Innovation Technology Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. Precision 5520
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-36-generic
root=/dev/mapper/ubuntu--gnome--vg-root ro ipv6.disable=1 net.ifnames=0
biosdevname=0 nvidia_drm.modeset=1 quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
RelatedPackageVersions:
linux-restricted-modules-4.13.0-36-generic N/A
linux-backports-modules-4.13.0-36-generic N/A
linux-firmware 1.170
Tags: xenial
Uname: Linux 4.13.0-36-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/15/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.7.0
dmi.board.name: 0R6JFH
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.7.0:bd12/15/2017:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn0R6JFH:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Precision
dmi.product.name: Precision 5520
dmi.sys.vendor: Dell Inc.
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