Once upon a time, Jeffrey Walton <noloader@xxxxxxxxx> said: > On Sun, Jun 30, 2024 at 12:52 PM Chris Adams <linux@xxxxxxxxxxx> wrote: > > After some recent updates, I seem to get an illegal instruction the > > first time or two I start Chrome/Chromium after boot. If I close it and > > reopen it a time or two, it'll work like normal from that point on, > > until I reboot again. It's the weirdest thing, I can't think of > > anything I've ever seen act like this before. > > > > Not sure if this is a problem with Chrome/Chromium, some library > > dependency, or even the kernel. It's happening for me on both Fedora 39 > > and 40 (both x86_64). dmesg shows: > > > > [ 127.676343] traps: chromium-browse[3675] trap int3 ip:55bcd5b053c6 sp:7fff6061e350 error:0 in chromium-browser[55bccfde1000+d8af000] > > It's hard to say whether a problem exists based on the information provided. > > In the case of crypto libraries, a common strategy at startup is to > perform cpu feature testing by trying an instruction in an ISA (like > SSE4.2, SecureKey or AVX2), and trapping a potential cpu fault. If the > fault is raised, the ISA is not available. Then the library sets up > its function calls based on availability. > > Video drivers probably perform similar probes at startup. > > So to investigate further, we probably need to see a disassembly > around the offending code, the name of the offending function, and the > callstack. I'm rusty on that kind of thing TBH, haven't needed to do that in many a year, so I'd need some instructions. It's just weird to me that it goes away on its own after 2-3 tries. I will say it doesn't appear to be video related at least; I'm hitting this trying to build an RPM in mock that runs Chromium headless in %test (so no video involved at all). -- Chris Adams <linux@xxxxxxxxxxx> -- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
