Description of problem: Trying to run the latest memtest86+ on various hardware, even in qemu, the seventh test (Random number sequence) fails and reports errors for each address from 129 MiB on. Version-Release number of selected component (if applicable): memtest86+ 4.20 from Fedora 17 Alpha DVD How reproducible: always Steps to Reproduce: 1. qemu-kvm -m 1024 -cdrom Fedora-17-Alpha-x86_64.DVD.iso 2. choose Troubleshooting => Run memory test Actual results: see the attached screenshot Expected results: no errors Additional info: Initially, I've run this on Intel SandyBridge hardware - Pentium B950 with some Samsung memories, and it failed this way, leading me to unjustified warranty claim ... After that, I've verified the same memtest behaviour on T510 with Core i7 M620, and on some older desktop with Core i5 - real hardware, proven by months of service => seeing the same all the time I've tried in qemu and it fails too.
Created attachment 571941 [details] screenshot of the problem
Created attachment 572002 [details] Temporal workaround Thanks for reporting. It seems to be related to gcc-4.7 update. Temporal workaround patch is attached (it could negatively affect performance). Scratch build: http://koji.fedoraproject.org/koji/taskinfo?taskID=3922148 I am working on better patch.
memtest86+-4.20-6.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/memtest86+-4.20-6.fc17
Proposing as Final blocker, though it's somewhat arguable. Criterion: "All release media must include a standalone memory test utility. A boot menu option to launch this utility must be present and must work correctly. " Also proposing as Beta NTH, it would be good to ensure the memtest in Beta works. -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
Package memtest86+-4.20-6.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing memtest86+-4.20-6.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-4808/memtest86+-4.20-6.fc17 then log in and leave karma (feedback).
*** Bug 807844 has been marked as a duplicate of this bug. ***
Discussed at 2012-03-28 go/no-go meeting, acting as an NTH review meeting. Accepted as NTH: this can't be fixed with an update, and it's obviously visibly bad to have broken memtest on our beta images. -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
memtest86+-4.20-6.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.