Date: Tue, 10 Mar 2020 19:53:57 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 243225] "mpr0: Out of chain frames" boot hang after clang 9.0.1 import (probably timing, not compiler related) Message-ID: <bug-243225-227-rRrROxC8Ij@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-243225-227@https.bugs.freebsd.org/bugzilla/> References: <bug-243225-227@https.bugs.freebsd.org/bugzilla/>
index | next in thread | previous in thread | raw e-mail
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243225 --- Comment #3 from Terry Kennedy <terry-freebsd@glaver.org> --- (In reply to Peter Eriksson from comment #2) X2APIC has been off on this system since it was installed - I see the same USB symptoms that you reported if I enable it. But I get the mpr(4) errors in either case. I updated the BIOS and OS Collector (which isn't used on FreeBSD) - everything else was already up-to-date = and repeated the tests, with the same result. Since I suspect this is timing-related, I enabled Hyperthreading (which I normally force off in the BIOS) and the system booted (at least this one time) without the mpr(4) hang. Again, this system had been working for some time, but then started hanging with the "out of chain frames" at boot time. Dell support moved the controller to a different slot, which "fixed" the problem, at least until the clang 9.x import, which apparently changed the timing enough to make the problem show up again. I think all of the above points to some timing issue in the mpr(4) driver. Hopefully someone with knowledge of that driver's inner workings will see this and comment. I can continue to make the system available (via iDRAC port, so the developer can reset it, change BIOS settings, etc.) if needed for someone to diagnose this issue. -- You are receiving this mail because: You are the assignee for the bug.help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-243225-227-rRrROxC8Ij>