With a kernel and world from r313943 sources (circa Feb 19, 2017), kldload of either drm2.ko or i915kms.ko will lock up the system. There is no keyboard response, screen output, or panic. Just a locked up system. A kernel from r313027 and its modules boots fine. 'kldload drm2.ko' yields the following in /var/log/messages: agp0: <Intel GM965 SVGA controller> on vgapci0 agp0: aperture size is 256M, detected 7676k stolen memory info: [drm] Initialized drm 1.1.0 20060810 'kldload drm2.ko' yields the following in /var/log/messages: drmn0: <Intel i965GM> on vgapci0 intel_iicbb0 on drmn0 iicbus0: <Philips I2C bus> on iicbb0 addr 0xf2 iic0: <I2C generic I/O> on iicbus0 iicbus1: <Philips I2C bus> on intel_gmbus0 iic1: <I2C generic I/O> on iicbus1 intel_iicbb1 on drmn0 iicbus2: <Philips I2C bus> on iicbb1 addr 0xf2 iic2: <I2C generic I/O> on iicbus2 iicbus3: <Philips I2C bus> on intel_gmbus1 iic3: <I2C generic I/O> on iicbus3 intel_iicbb2 on drmn0 iicbus4: <Philips I2C bus> on iicbb2 addr 0xf2 iic4: <I2C generic I/O> on iicbus4 iicbus5: <Philips I2C bus> on intel_gmbus2 iic5: <I2C generic I/O> on iicbus5 intel_iicbb3 on drmn0 iicbus6: <Philips I2C bus> on iicbb3 addr 0xf2 iic6: <I2C generic I/O> on iicbus6 iicbus7: <Philips I2C bus> on intel_gmbus3 iic7: <I2C generic I/O> on iicbus7 intel_iicbb4 on drmn0 iicbus8: <Philips I2C bus> on iicbb4 addr 0xf2 iic8: <I2C generic I/O> on iicbus8 iicbus9: <Philips I2C bus> on intel_gmbus4 iic9: <I2C generic I/O> on iicbus9 intel_iicbb5 on drmn0 iicbus10: <Philips I2C bus> on iicbb5 addr 0xf2 iic10: <I2C generic I/O> on iicbus10 iicbus11: <Philips I2C bus> on intel_gmbus5 iic11: <I2C generic I/O> on iicbus11 info: [drm] MSI enabled 1 message(s) info: [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). info: [drm] Driver supports precise vblank timestamp query. composite sync not supported intel_sdvo_ddc_proxy397632 on drmn0 intel_sdvo_ddc_proxy397632: detached intel_sdvo_ddc_proxy397664 on drmn0 intel_sdvo_ddc_proxy397664: detached drmn0: taking over the fictitious range 0xe0000000-0xf0000000 info: [drm] initialized overlay support info: [drm] Connector LVDS-1: get mode from tunables: info: [drm] - kern.vt.fb.modes.LVDS-1 info: [drm] - kern.vt.fb.default_mode info: [drm] Connector VGA-1: get mode from tunables: info: [drm] - kern.vt.fb.modes.VGA-1 info: [drm] - kern.vt.fb.default_mode info: [drm] Connector SVIDEO-1: get mode from tunables: info: [drm] - kern.vt.fb.modes.SVIDEO-1 info: [drm] - kern.vt.fb.default_mode composite sync not supported fbd0 on drmn0 VT: Replacing driver "vga" with new "fb". info: [drm] Initialized i915 1.6.0 20080730 for drmn0 on minor 0 A diff of dmesg.boot for the good kernel and bad kernel shows --- /root/dmesg.good 2017-02-20 13:30:06.707702000 -0800 +++ /root/dmesg.bad 2017-02-20 13:42:10.271942000 -0800 _at__at_ -2,11 +2,11 _at__at_ Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. -FreeBSD 12.0-CURRENT #3 r313027: Mon Feb 20 11:59:15 PST 2017 +FreeBSD 12.0-CURRENT #1 r313943: Sun Feb 19 09:18:03 PST 2017 root_at_laptop-kargl:/mnt/obj/mnt/src/sys/MOBILE i386 FreeBSD clang version 3.9.1 (tags/RELEASE_391/final 289601) (based on LLVM 3.9.1) VT(vga): text 80x25 -CPU: Intel(R) Core(TM)2 Duo CPU T7250 _at_ 2.00GHz (1995.05-MHz 686-class CPU) +CPU: Intel(R) Core(TM)2 Duo CPU T7250 _at_ 2.00GHz (1995.04-MHz 686-class CPU) Origin="GenuineIntel" Id=0x6fd Family=0x6 Model=0xf Stepping=13 Features=0xbfebfbff<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> Features2=0xe3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM> _at__at_ -15,7 +15,7 _at__at_ VT-x: (disabled in BIOS) HLT,PAUSE TSC: P-state invariant, performance statistics real memory = 4294967296 (4096 MB) -avail memory = 3663994880 (3494 MB) +avail memory = 3665018880 (3495 MB) Event timer "LAPIC" quality 100 ACPI APIC Table: <DELL M08 > FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs _at__at_ -24,7 +24,7 _at__at_ ioapic0 <Version 2.0> irqs 0-23 on motherboard random: entropy device external interface kbd1 at kbdmux0 -module_register_init: MOD_LOAD (vesa, 0xc0bf7440, 0) error 19 +module_register_init: MOD_LOAD (vesa, 0xc0ae6db0, 0) error 19 nexus0 vtvga0: <VT VGA driver> on motherboard acpi0: <DELL M08 > on motherboard _at__at_ -42,7 +42,7 _at__at_ attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 2 on acpi0 Timecounter "i8254" frequency 1193182 Hz quality 0 Event timer "i8254" frequency 1193182 Hz quality 100 -Timecounter "ACPI-safe" frequency 3579545 Hz quality 850 +Timecounter "ACPI-fast" frequency 3579545 Hz quality 900 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0 pcib0: <ACPI Host-PCI bridge> on acpi0 pcib0: failed to parse resources: AE_AML_NO_RESOURCE_END_TAG The module_register_init difference seems suspicious. -- Steve 20161221 https://www.youtube.com/watch?v=IbCHE-hONowReceived on Mon Feb 20 2017 - 22:52:25 UTC
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