Just to add some more information to this discussion, it appears that I'm now getting a similar error:
inteldrm0: gpu hung! no reset function for chipset. error: [drm:pid3099::inteldrm_lastclose] *ERROR* failed to idle hardware: 5 error: [drm:pid8658:inteldrm_lastclose] *ERROR* failed to idle hardware: 5 error: [drm:pid8658:i915_gem_entervt_ioctl] *ERROR* Reenabling wedged hardwarg, good luck inteldrm0: gpu hung! no reset function for chipset. dmesg as follows: OpenBSD 4.8 (GENERIC) #136: Mon Aug 16 09:06:23 MDT 2010 dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel(R) Pentium(R) 4 CPU 2.00GHz ("GenuineIntel" 686-class) 2 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM real mem = 527986688 (503MB) avail mem = 509390848 (485MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 05/28/02, BIOS32 rev. 0 @ 0xeba30, SMBIOS rev. 2.3 @ 0xfd486 (46 entries) bios0: vendor Compaq version "686O2 v1.08" date 05/28/2002 bios0: Compaq Evo D510 SFF acpi0 at bios0: rev 0 acpi0: sleep states S0 S1 S3 S4 S5 acpi0: tables DSDT FACP SSDT SSDT SSDT SSDT SSDT SSDT SSDT APIC SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT acpi0: wakeup devices PCI0(S4) HUB_(S4) COM1(S4) COM2(S4) USB1(S3) USB2(S3) USB3(S3) EUSB(S3) PBTN(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: apic clock running at 99MHz ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins ioapic0: misconfigured as apic 0, remapped to apid 8 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus 5 (HUB_) acpicpu0 at acpi0 acpibtn0 at acpi0: PBTN bios0: ROM list: 0xc0000/0xac00! 0xcac00/0x1800 0xe1c00/0x9000! pci0 at mainbus0 bus 0: configuration mode 1 (bios) pchb0 at pci0 dev 0 function 0 "Intel 82845G Host" rev 0x01 vga1 at pci0 dev 2 function 0 "Intel 82845G Video" rev 0x01 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) intagp0 at vga1 agp0 at intagp0: aperture at 0xf0000000, size 0x8000000 inteldrm0 at vga1: apic 8 int 16 (irq 11) drm0 at inteldrm0 uhci0 at pci0 dev 29 function 0 "Intel 82801DB USB" rev 0x01: apic 8 int 16 (irq 11) uhci1 at pci0 dev 29 function 1 "Intel 82801DB USB" rev 0x01: apic 8 int 19 (irq 5) ehci0 at pci0 dev 29 function 7 "Intel 82801DB USB" rev 0x01: apic 8 int 23 (irq 10) usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb0 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0x81 pci1 at ppb0 bus 5 fxp0 at pci1 dev 8 function 0 "Intel PRO/100 VM" rev 0x81, i82562: apic 8 int 20 (irq 5), address 00:08:02:39:b0:8e inphy0 at fxp0 phy 1: i82562EM 10/100 PHY, rev. 0 bktr0 at pci1 dev 9 function 0 "Brooktree BT878" rev 0x11: apic 8 int 18 (irq 10) bktr0: ATI TV-Wonder/VE, Philips NTSC tuner. "Brooktree BT878 Audio" rev 0x11 at pci1 dev 9 function 1 not configured ichpcib0 at pci0 dev 31 function 0 "Intel 82801DB LPC" rev 0x01 pciide0 at pci0 dev 31 function 1 "Intel 82801DB IDE" rev 0x01: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility wd0 at pciide0 channel 0 drive 0: <WDC WD400JB-00JJC0> wd0: 16-sector PIO, LBA, 38166MB, 78165360 sectors wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 atapiscsi0 at pciide0 channel 1 drive 0 scsibus0 at atapiscsi0: 2 targets cd0 at scsibus0 targ 0 lun 0: <HL-DT-ST, CD-RW GCE-8240B, 1.07> ATAPI 5/cdrom removable cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 auich0 at pci0 dev 31 function 5 "Intel 82801DB AC97" rev 0x01: apic 8 int 17 (irq 5), ICH4 AC97 ac97: codec id 0x41445372 (Analog Devices AD1981A) ac97: codec features headphone, 20 bit DAC, No 3D Stereo audio0 at auich0 usb1 at uhci0: USB revision 1.0 uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb2 at uhci1: USB revision 1.0 uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1 isa0 at ichpcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo pckbc0 at isa0 port 0x60/5 pckbd0 at pckbc0 (kbd slot) pckbc0: using irq 1 for kbd slot wskbd0 at pckbd0: console keyboard, using wsdisplay0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 lpt0 at isa0 port 0x378/4 irq 7 npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 fdc0 at isa0 port 0x3f0/6 irq 6 drq 2 mtrr: Pentium Pro MTRR support uplcom0 at uhub2 port 1 "Prolific Technology Inc. USB-Serial Controller" rev 1.10/3.00 addr 2 ucom0 at uplcom0 ugen0 at uhub1 port 1 "APC Back-UPS ES 550 FW:843.K1 .D USB FW:K1" rev 1.10/1.06 addr 2 uhidev0 at uhub2 port 2 configuration 1 interface 0 "Logitech USB RECEIVER" rev 1.10/25.10 addr 3 uhidev0: iclass 3/1 ums0 at uhidev0: 16 buttons, Z dir wsmouse0 at ums0 mux 0 softraid0 at root root on wd0a swap on wd0b dump on wd0b WARNING: / was not properly unmounted