Comment 0 for bug 1947780

Ubuntu 20.04.3 LTS

Kernel module ch341 in Ubuntu kernels 5.4.0-88-generic i 5.4.0-89-generic cannot program any esp8266 chips with ch340 chip uart controller. In kernel 5.4.0-86-generic everything is working good

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-89-generic 5.4.0-89.100
ProcVersionSignature: Ubuntu 5.4.0-89.100-generic 5.4.143
Uname: Linux 5.4.0-89-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: boguslaw 1801 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Tue Oct 19 21:14:32 2021
HibernationDevice: RESUME=UUID=924612b1-306e-46c9-bd1f-7324041efb4a
MachineType: Dell Inc. Latitude E6400
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-89-generic root=UUID=e7494ee9-8c5d-4133-bc4b-57986641b724 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-89-generic N/A
 linux-backports-modules-5.4.0-89-generic N/A
 linux-firmware 1.187.19
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/04/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A34
dmi.board.name: 0RX493
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA34:bd06/04/2013:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0RX493:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.