Date: Sat, 12 Sep 2020 21:09:19 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 248659] random system freezes Message-ID: <bug-248659-227-ddhKVgiBnI@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-248659-227@https.bugs.freebsd.org/bugzilla/> References: <bug-248659-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248659 rkoberman@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rkoberman@gmail.com --- Comment #3 from rkoberman@gmail.com --- Seeing the same issue on my Lenovo L15 running current on a Comet Lake CPU. Problem occurs in single-user mode and is mitigated by keyboard activity. T= his is a regression as the problem does not occur on 12.1-RELEASE-P8. Problem h= as occurred twice during boot, most recently after lo0 came up but before em0 = or rtwn were started. Happens when system is busy (compiles on all cores) or i= dle. GENERIC-NODEBUG kernel except using SCHED_4BSD. Will shortly build GENERIC-SCHED_4BSD. System gets very warm after the freeze and then cools, probably due to the firmware slowing the processor. This seems to indicate a possible loop in t= he kernel. As long as I keep the keyboard reasonably active, the system does not seem = to hang. While several times the freeze occurred when I was not closely watchi= ng the system, I am not aware of the system staying up longer than 10 minutes. When running in graphic mode (X11/MATE), it has frozen when I was typing on= at least one occasion. This could have been simple bad luck. Seems somewhat mo= re stable when in graphic mode.=20 >From dmesg: FreeBSD 13.0-CURRENT #2 r365481M: Tue Sep 8 20:16:02 PDT 2020 root@ptavv:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG amd64 FreeBSD clang version 11.0.0 (git@github.com:llvm/llvm-project.git llvmorg-11.0.0-rc2-0-g414f32a9e86)reeBSD clang version 11.0.0 (git@github.com:llvm/llvm-project.git llvmorg-11.0.0-rc2-0-g414f32a9e86) VT(efifb): resolution 1920x1080 CPU: Intel(R) Core(TM) i5-10210U CPU @ 1.60GHz (2112.11-MHz K8-class CPU) Origin=3D"GenuineIntel" Id=3D0xa0660 Family=3D0x6 Model=3D0xa6 Steppi= ng=3D0 =20 Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,= MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> =20 Features2=3D0x7ffafbbf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,S= DBG,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,= XSAVE,OSXSAVE,AVX,F16C,RDRAND> AMD Features=3D0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM> AMD Features2=3D0x121<LAHF,ABM,Prefetch> Structured Extended Features=3D0x29c67af<FSGSBASE,TSCADJ,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,N= FPUSG,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PROCTRACE> Structured Extended Features3=3D0xbc000400<MD_CLEAR,IBPB,STIBP,L1DFL,ARCH_CAP,SSBD> XSAVE Features=3D0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES> IA32_ARCH_CAPS=3D0x2b<RDCL_NO,IBRS_ALL,SKIP_L1DFL_VME,MDS_NO> VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID TSC: P-state invariant, performance statistics real memory =3D 4294967296 (4096 MB) avail memory =3D 3746226176 (3572 MB) Event timer "LAPIC" quality 600 ACPI APIC Table: <LENOVO TP-R17 > --=20 You are receiving this mail because: You are the assignee for the bug.=
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