Ubuntu 20.04 doesn't work with a Manhattan 152785 KVM switch (but 18.04 does)

[Jon Thackray]

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

[Hui Wang (hui.wang)]

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.

[Hui Wang (hui.wang)]

BTW, you said you tested 19.10 and onwards, did you test them on that 20.04 machine (ASuS machine) or the 18.04 machine?

[Jon Thackray (jgt)]

Neither. I tested all the distros on an old machine I have which
currently runs windows 10. The distros were tested by putting the
installation on a DVD and booting from it. Here's what windows claims it
has

Device name feit
Processor Intel(R) Core(TM) i7-2700K CPU @ 3.50GHz 3.50 GHz
Installed RAM 16.0 GB
Device ID 86452CEC-D6C1-46A6-9970-7FE2338F4B02
Product ID 00326-10000-00000-AA334
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

Here's the motherboard info

C:\Users\Jon>wmic baseboard get
product,Manufacturer,version,serialnumber
Manufacturer Product SerialNumber Version
Intel Corporation DH67BL BTBL13400AKJ AAG10189-209

I can't find an easy way to copy the USB info, so here's a screenshot
(attached)

------ Original Message ------
From: "Hui Wang" <email address hidden>
To: <email address hidden>
Sent: 08/06/2021 11:24:28
Subject: [Bug 1930925] Re: Ubuntu 20.04 doesn't work with Logitech, Inc.
Unifying Receiver over a KVM switch

>BTW, you said you tested 19.10 and onwards, did you test them on that
>20.04 machine (ASuS machine) or the 18.04 machine?
>
>--
>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 als...

[Jon Thackray (jgt)]

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...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jon Thackray (jgt)]

I just tried Ubuntu 22.04. Whilst the installer works correctly with the
KVM (so I can for example choose option 1, try or install), the
installation doesn't work (at least, not with the mouse, and without
that I can't get anything that would be sensitive to the keyboard).

By this time next year, there will be no Ubuntu (or Debian I think,
given that Rapsbian doesn't work with the KVM either) distribution I can
use, as at that point 18.04 will be end of support. I shall then start
having to try and learn other distros to see if any of them have
fixed/failed to create this bug.

Jon Thackray
<email address hidden>

0044 1223 276500 (home)
0044 7803 017991 (mobile)
0033 423354068 (France)

------ Original Message ------
From: "Launchpad Bug Tracker" <email address hidden>
To: <email address hidden>
Sent: 03/08/2021 04:57:57
Subject: [Bug 1930925] Re: Ubuntu 20.04 doesn't work with a Manhattan
152785 KVM switch (but 18.04 does)

>Status changed to 'Confirmed' because the bug affects multiple users.
>
>** Changed in: linux (Ubuntu)
> Status: New => Confirmed
>
>--
>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 a Manhattan 152785 KVM switch (but
> 18.04 does)
>
>Status in linux package in Ubuntu:
> Confirmed
>
>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-tesma...

[Jon Thackray (jgt)]

Is there a set of builds between 19.04 and 19.10 that I could binary
chop through? This would allow a developer to narrow down where the bug
was introduced. Checking a build takes about half an hour, so if there
were say one per day between April 2019 and October 2019, that would
require 0.5 * log2 (180) hours, ie about 4 hours.

Jon Thackray
<email address hidden>

0044 1223 276500 (home)
0044 7803 017991 (mobile)
0033 423354068 (France)

------ Original Message ------
From: "Daniel van Vugt" <email address hidden>
To: <email address hidden>
Sent: 22/04/2022 03:00:03
Subject: [Bug 1930925] Re: Ubuntu 20.04 doesn't work with a Manhattan
152785 KVM switch (but 18.04 does)

>** Tags added: jammy
>
>--
>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 a Manhattan 152785 KVM switch (but
> 18.04 does)
>
>Status in linux package in Ubuntu:
> Confirmed
>
>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 launc...

[Jon Thackray (jgt)]

I tried Fedora 35, and found the exact same behaviour (ie the boot
program recognises the keyboard, but the final linux image does not).

Jon Thackray
<email address hidden>

0044 1223 276500 (home)
0044 7803 017991 (mobile)
0033 423354068 (France)

------ Original Message ------
From: "Jon Thackray" <email address hidden>
To: <email address hidden>
Sent: 22/04/2022 08:14:03
Subject: Re: [Bug 1930925] Re: Ubuntu 20.04 doesn't work with a
Manhattan 152785 KVM switch (but 18.04 does)

>Is there a set of builds between 19.04 and 19.10 that I could binary
>chop through? This would allow a developer to narrow down where the bug
>was introduced. Checking a build takes about half an hour, so if there
>were say one per day between April 2019 and October 2019, that would
>require 0.5 * log2 (180) hours, ie about 4 hours.
>
>Jon Thackray
><email address hidden>
>
>0044 1223 276500 (home)
>0044 7803 017991 (mobile)
>0033 423354068 (France)
>
>------ Original Message ------
>From: "Daniel van Vugt" <email address hidden>
>To: <email address hidden>
>Sent: 22/04/2022 03:00:03
>Subject: [Bug 1930925] Re: Ubuntu 20.04 doesn't work with a Manhattan
>152785 KVM switch (but 18.04 does)
>
>>** Tags added: jammy
>>
>>--
>>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 a Manhattan 152785 KVM switch (but
>> 18.04 does)
>>
>>Status in linux package in Ubuntu:
>> Confirmed
>>
>>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 w...