Laptop sometimes hard reboots when scrolling in Twitter

This is one of the weirdest issues I have ever had: When scrolling in Twitter in a browser, the laptop suddenly does a hard restart. This can happen multiple times a day or it can take a few days before it happens. I cannot provoke the error reliably. It started around September 2024. * The laptop passes RAM test (24h) * It happens both in Firefox and in Brave * Scrolling can be done by touchpad or page-down. Same issue. * Same issue when using Intel or nVidia driver * No issue scrolling in, say, Instagram or in programs like LibreOffice * Laptop passes CPU stress test (8 hours of: s-tui stress; glxgears; VLC playing 2 video streams at 8Mbps each) * Running kernel 6.8.0-40 gives same issue It is not due to cooling: The boot can happen a high load or a low load. Is there any stress test I can run on the graphics cards? My best guess is that the scrolling sometimes triggers some sort of bug in the cards. Maybe a new optimization introduced in August in X.org triggers this? Can I run a test of all X.org commands? Can I ask X.org to be "less optimized"? OS: Ubuntu GNU/Linux 24.04 Graphics cards: ~~~ 01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 740M] (rev a1) 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) ~~~ journalctl -b -1 looks like it would if the power just disappeared: 100% normal and then nothing.