Tower computer using PS2 mouse causes total crash after install of upgrade.

[Jim]

Info Bug app collected and sent is wrong...I installed a fresh copy of Ubuntu 20.04 2 months ago not 900+ days ago. Full install. I had been using 18.04 for years. Mobo is 6-7 year old ASUS mobo using AMD Quad core CPU, I use the built in video chip. Mobo was just cleaned and re-heat sink compound applied just a month ago so no dust or overheating issue.

What Happened: Saw there was an upgrade ready, shut down all running apps and told it to install. Didn't pay attention but as it reached the end of the install crashed.

Actual problem: During upgrade, screen went black. Went into a boot loop. Unplugged my PS2 mouse (mobo has a built in port) and was able to boot. Millions still use the PS2 mouse and Keyboard because of the superior profile of the connector compared to a USB. During this problem, moved to a USB mouse.

During testing: Shut off computer and reinstalled PS2 mouse. Booted. Mouse WORKED at first burgundy screen. Stopped working at 2nd burgundy screen. Then the bug SHUT OFF THE CPU!!! This is a very bad bug as this is the kind of pathway hackers (especially teenagers) love to exploit. Inexperienced and less than competent repair people would generally change the entire mobo which would change the keyboard and mouse most likely as few new mobos have the PS2 setup. And the consumer would have been ripped off basically.

Crash is fatal...computer goes into a boot loop when there is a PS2 mouse installed. Did not test with a PS2 keyboard though. I have one somewhere. Works fine if the mouse it replaced with a USB mouse. NOT a favored fix method.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.28
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: X-Cinnamon
Date: Sun Dec 6 09:29:49 2020
InstallationDate: Installed on 2018-05-09 (942 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LD_PRELOAD=<set>
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: Upgraded to focal on 2020-11-05 (31 days ago)
VarLogDistupgradeTermlog:

[Jim (jimhitek)]

I had been using the PS2 mouse without issue for years, from Ubuntu 16.04 thru 18.04 and for the 1st two months with 20.04. Up until this most recent upgrade.

[Alex Murray (alexmurray)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.