I pursued this further and found that on multiple computers and keyboards including using both USB and PS2 keyboards.
Right-Alt + PrintScrn + REISUB works only while using PS2 keyboards, and it is consistent with multiple computers. The computer I reported this bug on does not have any PS2 ports. Furthermore REISUB works only with PS2 keyboards with LIVE openSUSE- Leap-15.3-DVD-x86_64-Build151.1-Media.iso and not USB keyboards on any computer I tried with it. Thus I take it that this is a kernel problem, and it is not mapping the Right-Alt key. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-screensaver in Ubuntu. https://bugs.launchpad.net/bugs/1929011 Title: Alt + SysRq/ PrintScrn + REISUB R-E-I-S-U-B for emergency reboot Status in gnome-screensaver package in Ubuntu: New Bug description: Left-Alt is always operational & Right-Alt is not at any time & not specific to this report's subject category. True on both desktop & Live ubuntu-20.04.2.0-desktop-amd64.iso. It is natural to use Right-Alt due to a closer distance to the SysRq key. This might help explain why some say REISUB does not work. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-screensaver (not installed) ProcVersionSignature: Ubuntu 5.8.0-53.60~20.04.1-generic 5.8.18 Uname: Linux 5.8.0-53-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.11-0ubuntu27.17 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu May 20 00:27:12 2021 InstallationDate: Installed on 2020-07-14 (309 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-screensaver Symptom: security Title: Screen locking issue UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1929011/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
