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BSOD/Lockups, Unexpected Kernel Mode Trap 0x7f
Hi everyone
I built my PC in September 2015, full specs should be on my profile didn't have problems initially with it, the problem started about a year ago.
I get freezes randomly when gaming (and only when gaming it seems), initially the PC would totally lock up with the picture frozen on the screen, no mouse/kb response, and often with hideous audio where it had crashed whilst playing a sound. I had to hold the power button in for a few seconds to resolve this.I could not find anything in the event log, except a notification that the PC had shutdown unexpectedly (logged upon reboot). I reinstalled Windows 10 and it seemed to be OK for a while, but recently the problem came back and got worse. I reinstalled Windows 10 again, but this didn't help this time.
I checked all drivers were up to date (they were) and also updated the BIOS. The temperatures at the points it crashed didn't seem that high, GPU was 65-70 degrees and CPU was 35-40 degrees.I had installed a sound card (Soundblaster ZX) around the time the problems started so I figured maybe it was that. So I uninstalled it, and did a fresh Windows 10 install.I installed bare minimum (drivers for mobo, gpu and windows updates) and played one of the more demanding games that seemed particularly to cause the crashes.
It ran ok for 3 hours one night, and 2 hours the next. I thought at this point I had fixed it, but then it crashed again. This time however I did get a blue screen. The error listed was "Unexpected Kernel Mode Trap 0x7f". It said it would collate info and has a progress indicator but this never changed, so I had to hard reset.
Looking into this message some people on this website suggested RAM problems, so I ran the Windows memory diagnostic, which found nothing. I have run MemTest86 for a full 8 passes and it found zero errors (didn't think to take a photo of it unfortunately as it found nothing so didn't think it would help). I also ran the Intel Processor Diagnostic tool, everything passed OK. Crucial SSD software reports SMART test all OK.
I attach the diagnostic files from running dm_log_collector. Any advice would be appreciated
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Attachment 142576
Thanks, Matt
Last edited by mattad0r; 05 Jul 2017 at 10:58.