[Bug 2154536] Re: Firefox crashes system and reboots on certain webpages

Hi gjbauer, Thanks for taking the time to submit a bug report and help improve Ubuntu! Since based on your testing this is resolved in upstream Linux, it would help to narrow down the fix to a specific fix version. Please try mainline builds from here: https://kernel.ubuntu.com/mainline/?C=N;O=D. Instructions for using mainline builds can be found on this wiki page: https://wiki.ubuntu.com/Kernel/MainlineBuilds. I would recommend trying the v7.1 build to see if it is resolved in the v7.1 release tag, and v7.0.14 to see if recent v7.0.x stable updates might include the fix. There is also a new Ubuntu kernel tag Ubuntu-7.0.0-28.28 that contains several v7.0.x upstream stable update patchsets, which may resolve your issue. A build of this kernel exists in the following PPA: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa. If you try this pre-release build, be sure to remove the PPA from your system when you are finished testing. Please also include the head commit of the upstream 7.1.0+ build you found resolved the issue to further narrow down the fix. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2154536 Title: Firefox crashes system and reboots on certain webpages Status in firefox package in Ubuntu: New Status in linux package in Ubuntu: Incomplete Bug description: When I tried to open certain web pages on Firefox on an ARM64 machine (a ThinkPad X13s Gen 1 with a Snapdragon 8cx Gen 3 SoC), the screen would go black and the system would reboot. I have not tried it on chromium yet, but if that browser works, I will be using it until a patch is made. This happened to me twice on the following webpages https://swaywm.org and https://www.ti.com/tool/MSP-EXP430FR5994 ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: firefox 1:1snap1-0ubuntu8 ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0 Uname: Linux 7.0.0-15-generic aarch64 ApportVersion: 2.34.0-0ubuntu2 Architecture: arm64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu May 28 22:22:42 2026 InstallationDate: Installed on 2026-05-28 (1 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release arm64 (20260423.1) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/usr/bin/zsh TERM=xterm-256color XDG_RUNTIME_DIR=<set> SnapChanges: no changes found SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2154536/+subscriptions