this update caused a regression: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1941798
commit in question is https://git.launchpad.net/~ubuntu- kernel/ubuntu/+source/linux/+git/focal/commit/drivers/usb/serial/ch341.c?id=5e940f519a0d7ef1857b51b6ce3eb2a6731d9b26 the issue was reported upstream https://bugzilla.kernel.org/show_bug.cgi?id=214131 and reverted in https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb- serial.git/commit/?h=usb- linus&id=df7b16d1c00ecb3da3a30c999cdb39f273c99a2f this commit needs to be brought in ** Bug watch added: Linux Kernel Bug Tracker #214131 https://bugzilla.kernel.org/show_bug.cgi?id=214131 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1947780 Title: Kernel module ch341 bug Status in linux package in Ubuntu: Confirmed Bug description: Ubuntu 20.04.3 LTS Kernel module ch341 in Ubuntu kernels 5.4.0-88-generic and 5.4.0-89-generic cannot program any esp8266 modules like Wemos D1 mini which contain ch340 chip uart controller. In kernel 5.4.0-86-generic everything is working good. Communication over serial connection is working in both cases only programming using esptool is broken, kernel module do not react properly to response fom ch340 chip I suppose 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1947780/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
