Public bug reported:

Issue with esp8266 esptool communications.

This is a bug known at kernel.org
"Bug 214131 - ch341 communication problem"
https://bugzilla.kernel.org/show_bug.cgi?id=214131

It has a resolution, however it appears this has not been pushed out to
Ubuntu yet so it is affecting my system.

The issue causes esptool not to be able to communicate with
esp8266/esp32 USB chips.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-88-generic 5.4.0-88.99
ProcVersionSignature: Ubuntu 5.4.0-88.99-generic 5.4.140
Uname: Linux 5.4.0-88-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  browna     3672 F.... pulseaudio
 /dev/snd/controlC0:  browna     3672 F.... pulseaudio
CasperMD5CheckResult: skip
Date: Tue Oct 12 22:33:36 2021
HibernationDevice: # RESUME=UUID=5ec6ef50-65f9-40c2-87ee-3a7a9cd01da7
InstallationDate: Installed on 2015-05-07 (2350 days ago)
InstallationMedia: Xubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 
(20150218.1)
MachineType: Acer Aspire VN7-571
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-88-generic 
root=UUID=14353e0d-b4a9-4bfa-b347-cc7a99bdc8bd ro quiet splash i8042.nopnp 
vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-88-generic N/A
 linux-backports-modules-5.4.0-88-generic  N/A
 linux-firmware                            1.187.17
SourcePackage: linux
StagingDrivers: ashmem_linux
UpgradeStatus: Upgraded to focal on 2020-11-16 (330 days ago)
dmi.bios.date: 09/12/2014
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.08
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Aspire VN7-571
dmi.board.vendor: Acer
dmi.board.version: V1.08
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: V1.08
dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV1.08:bd09/12/2014:svnAcer:pnAspireVN7-571:pvrV1.08:rvnAcer:rnAspireVN7-571:rvrV1.08:cvnChassisManufacturer:ct10:cvrV1.08:
dmi.product.family: Sharkbay System
dmi.product.name: Aspire VN7-571
dmi.product.sku: Aspire VN7-571_091B_1.08
dmi.product.version: V1.08
dmi.sys.vendor: Acer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal staging

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https://bugs.launchpad.net/bugs/1946796

Title:
  ch341 communication problem from kernel.org

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