Hello,
the fix mentioned in comment #3:
dcf097e7d21f ("USB: serial: pl2303: fix GL type detection")Has already landed in the Ubuntu 5.13 Impish tree: https://kernel.ubuntu.com/git/ubuntu/ubuntu-impish.git/commit/?id=77f82bf386d90b9b8e30ca0449177d8fcc3f06b6 With version: $ git tag --contains 77f82bf386d90b9b8e30ca0449177d8fcc3f06b6 Ubuntu-5.13.0-21.21 Ubuntu-5.13.0-22.22 Ubuntu-5.13.0-23.23 Ubuntu-5.13.0-24.24 Ubuntu-5.13.0-25.26 Ubuntu-5.13.0-26.27 Ubuntu-5.13.0-27.29 Ubuntu-5.13.0-28.31 Ubuntu-5.13.0-29.32 Ubuntu-5.13.0-30.33 Ubuntu-5.13.0-31.34 So apparently this is not the one. However the fix mentioned in the bug description: aa5721a9 ("USB: serial: pl2303: fix GC type detection") Has landed on 5.13 Impish tree as well: https://kernel.ubuntu.com/git/ubuntu/ubuntu-impish.git/commit/?id=4e1c49e9822a81d05f0518b78968681b8b95c13e With version: $ git tag --contain 4e1c49e9822a81d05f0518b78968681b8b95c13e Ubuntu-5.13.0-29.32 Ubuntu-5.13.0-30.33 Ubuntu-5.13.0-31.34 Please upgrade your kernel to give the latest Ubuntu 5.13 Impish kernel a try and check if this can solve your problem. Thanks! ** Changed in: linux-signed-hwe-5.13 (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/1959110 Title: pl2303 serial adapter no longer recognized Status in linux-signed-hwe-5.13 package in Ubuntu: Incomplete Bug description: Hi, After upgrading the Linux kernel to 5.13.0-27 my pl2303 device stopped working. Error from dmesg: jan 26 07:39:24 semalx0017 kernel: Linux version 5.13.0-27-generic (buildd@lgw01-amd64-045) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #29~20.04.1-Ubuntu SMP Fri Jan 14 00:32:30 UTC 2022 (Ubuntu 5.13.0> ... jan 26 07:39:24 semalx0017 kernel: pl2303 3-5.1.3:1.0: pl2303 converter detected jan 26 07:39:24 semalx0017 kernel: pl2303 3-5.1.3:1.0: unknown device type, please report to linux-...@vger.kernel.org This works fine in the previous 5.11.0-27-generic kernel. Probably this patch needs backporting "USB: serial: pl2303: fix GC type detection" https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aa5721a9e0c9fb8a4bdfe0c8751377cd537d6174 lsusb: Bus 003 Device 012: ID 067b:23a3 Prolific Technology, Inc. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x067b Prolific Technology, Inc. idProduct 0x23a3 bcdDevice 1.05 iManufacturer 1 iProduct 2 iSerial 3 bNumConfigurations 1 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.13.0-27-generic:amd64 5.13.0-27.29~20.04.1 ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22 Uname: Linux 5.11.0-27-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: Unity Date: Wed Jan 26 15:11:11 2022 InstallationDate: Installed on 2022-01-24 (2 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) SourcePackage: linux-signed-hwe-5.13 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1959110/+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
