I don't have a "Unifying receiver". That's just the name which appears 
and/or disappears when I plug in the KVM to the PC. The KVM in all cases 
is directly connected to the keyboard/mouse/screen at one end, and USB 
ports/HDMI at the PC end.

------ Original Message ------
From: "Hui Wang" <email address hidden>
To: <email address hidden>
Sent: 08/06/2021 11:21:35
Subject: [Bug 1930925] Re: Ubuntu 20.04 doesn't work with Logitech, Inc. 
Unifying Receiver over a KVM switch

>Please plug the Unifying Receiver to the usb port of 20.04 machine
>directly (the usb port which connects to the KVM switch), then run lsusb
>and upload the output.
>
>Let us compare the log with the one you plug the Unifying Receiver to
>the usb port of KVM switch.
>
>--
>You received this bug notification because you are subscribed to the bug
>report.
>https://bugs.launchpad.net/bugs/1930925
>
>Title:
>   Ubuntu 20.04 doesn't work with Logitech, Inc. Unifying Receiver over a
>   KVM switch
>
>Status in linux package in Ubuntu:
>   New
>
>Bug description:
>   I have recently acquired a acquired a desktop running ubuntu 20.04. I
>   have several computers and switch between them using this KVM
>https://www.amazon.co.uk/gp/product/B077SV9MMQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
>   The other machines are either running windows or ubuntu 18.04 or
>   earlier. They are all fine, but the with 20.04 machine neither the
>   keyboard nor the mouse works. On the 18.04 machine I can see
>
>   lsusb
>   Bus 002 Device 002: ID 8087:8000 Intel Corp.
>   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>   Bus 001 Device 002: ID 8087:8008 Intel Corp.
>   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>   Bus 003 Device 005: ID 046d:c534 Logitech, Inc. Unifying Receiver
>   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>
>   and it is the Logitech, Inc. Unifying Receiver which appears when the
>   USB from the KVM is connected. On the 20.04 machine only this appears
>
>   lsusb
>   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>   Bus 001 Device 003: ID 0b05:19af ASUSTek Computer, Inc. AURA LED Controller
>   Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
>   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>
>   I have tested installation discs from 19.04 onwards. The failure first
>   appears in 19.10 and is still present in 21.04
>
>   I can observe a similar problem with a dual boot laptop running
>   windows 10 and 20.04. With windows 10 I can use it with the KVM for
>   screen and keyboard/mouse, but with ubuntu 20.04 the keyboard and
>   mouse do not work. This issue has also been observed here
>https://unix.stackexchange.com/questions/646515/using-logitech-mouse-
>   keyboard-on-tesmart-kvm-switch-with-ubuntu-20-04 and I have observed
>   it using a Lindy 2 port HDMI/USB KVM (but I'm unsure of the model).
>
>   I had to report this originally against xorg as this bug reporting
>   system seems not to allow reporting of bugs against unknown packages.
>   I also had to report it through the ubuntu-bug executable as I've been
>   unable to find a way in launchpad of reporting a bug (as opposed to
>   getting a guided tour about reporting bugs).
>
>   I am happy to supply more info and test fixes if I am asked but as
>   with this type of bug where something fails to happen rather than
>   something wrong happens I don't know what to look at.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 20.04
>   Package: xorg 1:7.7+19ubuntu14
>   ProcVersionSignature: Ubuntu 5.8.0-53.60~20.04.1-generic 5.8.18
>   Uname: Linux 5.8.0-53-generic x86_64
>   ApportVersion: 2.20.11-0ubuntu27.18
>   Architecture: amd64
>   BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
>   CasperMD5CheckResult: skip
>   CompositorRunning: None
>   Date: Fri Jun  4 20:21:15 2021
>   DistUpgraded: Fresh install
>   DistroCodename: focal
>   DistroVariant: ubuntu
>   DpkgLog:
>
>   ExtraDebuggingInterest: Yes
>   GraphicsCard:
>    Intel Corporation Device [8086:4c8a] (rev 04) (prog-if 00 [VGA controller])
>      Subsystem: ASUSTeK Computer Inc. Device [1043:8694]
>   InstallationDate: Installed on 2021-05-14 (21 days ago)
>   InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
>   Lsusb:
>    Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
>    Bus 001 Device 003: ID 0b05:19af ASUSTek Computer, Inc. AURA LED Controller
>    Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
>    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>   Lsusb-t:
>    /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 10000M
>    /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/16p, 480M
>        |__ Port 11: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
>        |__ Port 13: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
>        |__ Port 13: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
>   MachineType: ASUS System Product Name
>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-53-generic root=UUID=0c391c11-c570-4e04-a351-4fd128a75369 ro quiet splash vt.handoff=7
>   SourcePackage: xorg
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   dmi.bios.date: 04/27/2021
>   dmi.bios.release: 8.20
>   dmi.bios.vendor: American Megatrends Inc.
>   dmi.bios.version: 0820
>   dmi.board.asset.tag: Default string
>   dmi.board.name: PRIME H570M-PLUS
>   dmi.board.vendor: ASUSTeK COMPUTER INC.
>   dmi.board.version: Rev 1.xx
>   dmi.chassis.asset.tag: Default string
>   dmi.chassis.type: 3
>   dmi.chassis.vendor: Default string
>   dmi.chassis.version: Default string
>   dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0820:bd04/27/2021:br8.20:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEH570M-PLUS:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
>   dmi.product.family: To be filled by O.E.M.
>   dmi.product.name: System Product Name
>   dmi.product.sku: SKU
>   dmi.product.version: System Version
>   dmi.sys.vendor: ASUS
>   version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1
>   version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
>   version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
>   version.libgl1-mesa-glx: libgl1-mesa-glx N/A
>   version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2
>   version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
>   version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
>   version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
>   version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
>
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