Control: forwarded 1111027 [🔎] tfwuhg7fxlvb3iix2k4qqh74dcmwgcipprlehy7zlaz3btmtym@2x2vsccw5yzs">https://lore.kernel.org/lkml/[🔎] tfwuhg7fxlvb3iix2k4qqh74dcmwgcipprlehy7zlaz3btmtym@2x2vsccw5yzs Hello Rafael, Thorsten (on Cc:) reported a bug against the 6.12.38 Debian kernel running on an HP Microserver Gen8 after upgrading from an older Debian release (which uses a kernel based on 6.1.y). The problem is that the machine sometimes just hangs, requiring to unplug the PSU to revive it. A key hint seems to me a kernel message: [Fr Sep 5 21:12:34 2025] NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0. (sometimes also "reason 61") that happens just before the hang. See https://bugs.debian.org/1111027 for all the details. I asked Thomas on irc if that rings a bell for him and he forwarded me to you. Do you have an idea for a reason for this message and the corresponding(?) machine hang? The bug reporter up to now was very cooperative for debug measures (e.g. a BIOS update). I would expect him to be open to support you if questions should arise or a patch should be tested. A complication however is that the trigger for the problem is unknown and it takes up to several days to happen. Thanks in advance for your feedback, Uwe
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