Public bug reported:
Asus Zenbook Flip S (UX-370UAR). Intel Core i7-8550U CPU).
The X freezes and doesnt even allow to start a console session.
Only happening on Ubuntu 18.04 and 20.04.
Does not happen in the same computer under Ubuntu 16.04 or Windows 10.
Can be replicated easily. Every time I plug/unplug the power USB-C or
the USB-c hub. Mostly, on any interaction with the USB-c or I/O ports.
If I plug/unplug the USB-c without X in a console session (CTRL+ALT+F3) I get
the following:
BUG: kernel NULL point dereference, address: 0000000000000080
...
Workqueue: events ucsi_connector_change [typec_usci]
RIP: 0010:ucsi_displayport_remove_partner+0xe/0x30 [typec_usci]
...
Find a picture of the full error attached
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-29-generic 5.4.0-29.33
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: vks20 1808 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed May 13 23:46:49 2020
InstallationDate: Installed on 2020-05-14 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: ASUSTeK COMPUTER INC. UX370UAR
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic
root=UUID=acc6d87c-574b-4c1e-8e8f-e75c1e9ff1fc ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-29-generic N/A
linux-backports-modules-5.4.0-29-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/15/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX370UAR.311
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX370UAR
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrUX370UAR.311:bd10/15/2019:svnASUSTeKCOMPUTERINC.:pnUX370UAR:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX370UAR:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct31:cvr1.0:
dmi.product.family: ZenBook Flip
dmi.product.name: UX370UAR
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug focal
** Attachment added: "Image capturing the full bug"
https://bugs.launchpad.net/bugs/1878544/+attachment/5371316/+files/IMG_20200513_232520.jpg
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https://bugs.launchpad.net/bugs/1878544
Title:
kernel NULL pointer dereference when plugging/unpluggin USB-c (power
or hub)
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