On Fri, May 21, 2021 at 06:03:49AM +0200, Theo Buehler wrote: > On Thu, May 20, 2021 at 12:19:37AM +0200, Mark Kettenis wrote: > > My last change to dsdt.c broke one or two of my cheap little Intel > > "Atom" laptops. Seems my interpretation of the ACPI standard wasn't > > quite right. I went back to the original bug report and I think I > > understand a bit better what the AML in that report is trying to do. > > So here is a diff that fixes things. > > > > Theo, can you try this on that Dell Precision 3640? > > > > Tests on other hardware are welcome, especially on laptops. > > That Dell Precision boots happily with this, as does my x280. >
With Mark's patch Asus E200HA boots OK (disabled acpitz and inteldrm for other problems), attached e200ha-dmesg-patched.txt. Without Mark's patch, -current panics, attached handwritten e200ha-dmesg-current.txt.
OpenBSD 6.9-current (GENERIC.MP) #28: Fri May 21 06:24:33 CEST 2021 ?? ?? [email protected]:/sys/arch/amd64/compile/GENERIC.MP real mem = 2020298752 (1926MB) avail mem = 1935659008 (1845MB) random: good seed from bootblocks mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 3.0 @ 0x7b19e000 (19 entries) bios0: vendor American Megatrends Inc. version "E200HA.303" date 12/21/2016 bios0: ASUSTeK COMPUTER INC. E200HA acpi0 at bios0: ACPI 5.0 acpi0: sleep states S0 S4 S5 acpi0: tables DSDT FACP APIC FPDT FIDT MCFG SSDT SSDT SSDT UEFI HPET SSDT SSDT SSDT SSDT TPM2 LPIT BCFG PRAM BGRT CSRT WDAT MSDM acpi0: wakeup devices acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1440.32 MHz, 06-4c-03 cpu0: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu0: 1MB 64b/line 16-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic clock running at 79MHz cpu0: mwait min=64, max=64, C-substates=0.2.0.0.0.0.3.3, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1439.97 MHz, 06-4c-03 cpu1: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu1: 1MB 64b/line 16-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) cpu2: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1439.98 MHz, 06-4c-03 cpu2: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu2: 1MB 64b/line 16-way L2 cache cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) cpu3: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1439.97 MHz, 06-4c-03 cpu3: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu3: 1MB 64b/line 16-way L2 cache cpu3: smt 0, core 3, package 0 ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 115 pins acpimcfg0 at acpi0 acpimcfg0: addr 0xe0000000, bus 0-255 acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (RP01) acpiprt2 at acpi0: bus -1 (RP02) acpiprt3 at acpi0: bus -1 (RP03) acpiprt4 at acpi0: bus -1 (RP04) acpiec0 at acpi0: not present "INT33A4" at acpi0 not configured dwiic0 at acpi0 I2C1 addr 0x91432000/0x1000 irq 32 iic0 at dwiic0 chvgpio0 at acpi0 GPO0 uid 1 addr 0xfed80000/0x8000 irq 49, 56 pins ihidev0 at iic0 addr 0x68 gpio 93, vendor 0xb05 product 0x8585, PDEC3393 ihidev0: 9 report ids ikbd0 at ihidev0 reportid 1: 8 variable keys, 6 key codes wskbd0 at ikbd0 mux 1 hid at ihidev0 reportid 3 not configured hid at ihidev0 reportid 6 not configured hid at ihidev0 reportid 9 not configured dwiic1 at acpi0 I2C3 addr 0x9142e000/0x1000 irq 34 iic1 at dwiic1 chvgpio1 at acpi0 GPO1 uid 2 addr 0xfed88000/0x8000 irq 48, 59 pins ihidev1 at iic1 addr 0x15 gpio 17, vendor 0xb05 product 0x101, FTE1000 ihidev1: 93 report ids ims0 at ihidev1 reportid 1: 2 buttons, Z dir wsmouse0 at ims0 mux 0 hid at ihidev1 reportid 11 not configured hid at ihidev1 reportid 12 not configured hid at ihidev1 reportid 13 not configured hid at ihidev1 reportid 93 not configured dwiic2 at acpi0 I2C7 addr 0x91426000/0x1000 irq 38 iic2 at dwiic2 tipmic0 at iic2 addr 0x5e gpio 15 chvgpio2 at acpi0 GPO2 uid 3 addr 0xfed90000/0x8000 irq 50, 24 pins acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001 sdhc0 at acpi0 SDHA addr 0x91438000/0x1000 irq 45 sdhc0: SDHC 3.0, 200 MHz base clock sdmmc0 at sdhc0: 8-bit, sd high-speed, mmc high-speed, ddr52, dma sdhc1 at acpi0 SHC1 addr 0x91436000/0x1000 irq 47 sdhc1: SDHC 3.0, 200 MHz base clock sdmmc1 at sdhc1: 4-bit, sd high-speed, mmc high-speed, ddr52, dma "INTL9C60" at acpi0 not configured "INTL9C60" at acpi0 not configured "8086228A" at acpi0 not configured "8086228A" at acpi0 not configured "8086228E" at acpi0 not configured "8086228E" at acpi0 not configured "8086228E" at acpi0 not configured Data modified on freelist: word 782944 of object 0xffff80000003ebe0 size 0x10 previous type ??? (invalid addr 0x6b6d6f259f3b97e1) kernel: protection fault trap, code=0 Stopped at malloc+0x4a6: movq 0x8(%r13),%rbx ddb{0}>
OpenBSD 6.9-current (GENERIC.MP) #28: Fri May 21 09:47:04 CEST 2021 ?? ?? [email protected]:/sys/arch/amd64/compile/GENERIC.MP real mem = 2020298752 (1926MB) avail mem = 1935659008 (1845MB) random: good seed from bootblocks mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 3.0 @ 0x7b19e000 (19 entries) bios0: vendor American Megatrends Inc. version "E200HA.303" date 12/21/2016 bios0: ASUSTeK COMPUTER INC. E200HA acpi0 at bios0: ACPI 5.0 acpi0: sleep states S0 S4 S5 acpi0: tables DSDT FACP APIC FPDT FIDT MCFG SSDT SSDT SSDT UEFI HPET SSDT SSDT SSDT SSDT TPM2 LPIT BCFG PRAM BGRT CSRT WDAT MSDM acpi0: wakeup devices acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1440.32 MHz, 06-4c-03 cpu0: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu0: 1MB 64b/line 16-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic clock running at 79MHz cpu0: mwait min=64, max=64, C-substates=0.2.0.0.0.0.3.3, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1439.97 MHz, 06-4c-03 cpu1: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu1: 1MB 64b/line 16-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) cpu2: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1439.98 MHz, 06-4c-03 cpu2: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu2: 1MB 64b/line 16-way L2 cache cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) cpu3: Intel(R) Atom(TM) x5-Z8300 CPU @ 1.44GHz, 1439.97 MHz, 06-4c-03 cpu3: FPU,VME,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,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,AES,RDRAND,NXE,RDTSCP,LONG,LAHF,3DNOWP,PERF,ITSC,TSC_ADJUST,SMEP,ERMS,MD_CLEAR,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN cpu3: 1MB 64b/line 16-way L2 cache cpu3: smt 0, core 3, package 0 ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 115 pins acpimcfg0 at acpi0 acpimcfg0: addr 0xe0000000, bus 0-255 acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (RP01) acpiprt2 at acpi0: bus -1 (RP02) acpiprt3 at acpi0: bus -1 (RP03) acpiprt4 at acpi0: bus -1 (RP04) acpiec0 at acpi0: not present "INT33A4" at acpi0 not configured dwiic0 at acpi0 I2C1 addr 0x91432000/0x1000 irq 32 iic0 at dwiic0 chvgpio0 at acpi0 GPO0 uid 1 addr 0xfed80000/0x8000 irq 49, 56 pins ihidev0 at iic0 addr 0x68 gpio 93, vendor 0xb05 product 0x8585, PDEC3393 ihidev0: 9 report ids ikbd0 at ihidev0 reportid 1: 8 variable keys, 6 key codes wskbd0 at ikbd0 mux 1 hid at ihidev0 reportid 3 not configured hid at ihidev0 reportid 6 not configured hid at ihidev0 reportid 9 not configured dwiic1 at acpi0 I2C3 addr 0x9142e000/0x1000 irq 34 iic1 at dwiic1 chvgpio1 at acpi0 GPO1 uid 2 addr 0xfed88000/0x8000 irq 48, 59 pins ihidev1 at iic1 addr 0x15 gpio 17, vendor 0xb05 product 0x101, FTE1000 ihidev1: 93 report ids ims0 at ihidev1 reportid 1: 2 buttons, Z dir wsmouse0 at ims0 mux 0 hid at ihidev1 reportid 11 not configured hid at ihidev1 reportid 12 not configured hid at ihidev1 reportid 13 not configured hid at ihidev1 reportid 93 not configured dwiic2 at acpi0 I2C7 addr 0x91426000/0x1000 irq 38 iic2 at dwiic2 tipmic0 at iic2 addr 0x5e gpio 15 chvgpio2 at acpi0 GPO2 uid 3 addr 0xfed90000/0x8000 irq 50, 24 pins acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001 sdhc0 at acpi0 SDHA addr 0x91438000/0x1000 irq 45 sdhc0: SDHC 3.0, 200 MHz base clock sdmmc0 at sdhc0: 8-bit, sd high-speed, mmc high-speed, ddr52, dma sdhc1 at acpi0 SHC1 addr 0x91436000/0x1000 irq 47 sdhc1: SDHC 3.0, 200 MHz base clock sdmmc1 at sdhc1: 4-bit, sd high-speed, mmc high-speed, ddr52, dma "INTL9C60" at acpi0 not configured "INTL9C60" at acpi0 not configured "8086228A" at acpi0 not configured "8086228A" at acpi0 not configured "8086228E" at acpi0 not configured "8086228E" at acpi0 not configured "8086228E" at acpi0 not configured acpibat0 at acpi0: BATC model "SR Real Battery" serial 123456789 type LION oem "Intel SR 1" dwiic3 at acpi0 I2C2 addr 0x91430000/0x1000 irq 33 iic3 at dwiic3 "14F10720" at iic3 addr 0x33 not configured dwiic4 at acpi0 I2C4 addr 0x9142c000/0x1000 irq 35 iic4 at dwiic4 dwiic5 at acpi0 I2C5 addr 0x9142a000/0x1000 irq 36 iic5 at dwiic5 dwiic6 at acpi0 I2C6 addr 0x91428000/0x1000 irq 37 iic6 at dwiic6 "808622A8" at acpi0 not configured acpicmos0 at acpi0 acpibtn0 at acpi0: PWRB acpibtn1 at acpi0: SLPB chvgpio3 at acpi0 GPO3 uid 4 addr 0xfed98000/0x8000 irq 91, 55 pins chvgpio4 at acpi0 GPO4 uid 5 "INT33BD" at acpi0 not configured "ACPI000C" at acpi0 not configured "PNP0C14" at acpi0 not configured "ATK4002" at acpi0 not configured acpiac0 at acpi0: AC unit online acpibtn2 at acpi0: LID_ "INTCFD9" at acpi0 not configured "INT33D3" at acpi0 not configured "INT3400" at acpi0 not configured "INT3403" at acpi0 not configured "INT3406" at acpi0 not configured "MSFT0101" at acpi0 not configured acpicpu0 at acpi0: C3(10@1000 mwait.1@0x64), C2(10@500 mwait.1@0x58), C1(1000@1 mwait.1), PSS acpicpu1 at acpi0: C3(10@1000 mwait.1@0x64), C2(10@500 mwait.1@0x58), C1(1000@1 mwait.1), PSS acpicpu2 at acpi0: C3(10@1000 mwait.1@0x64), C2(10@500 mwait.1@0x58), C1(1000@1 mwait.1), PSS acpicpu3 at acpi0: C3(10@1000 mwait.1@0x64), C2(10@500 mwait.1@0x58), C1(1000@1 mwait.1), PSS acpipwrres0 at acpi0: ID3C, resource for ISP3 acpipwrres1 at acpi0: CLK3, resource for CNXT acpipwrres2 at acpi0: CLK4 acpipwrres3 at acpi0: CLK2 acpipwrres4 at acpi0: CLK0 acpipwrres5 at acpi0: CLK1 acpipwrres6 at acpi0: CLK0 acpipwrres7 at acpi0: CLK1 acpipwrres8 at acpi0: USBC, resource for XHC1, OTG1 acpipwrres9 at acpi0: P28X acpipwrres10 at acpi0: P18X acpipwrres11 at acpi0: P12X acpipwrres12 at acpi0: P28P acpipwrres13 at acpi0: P18P acpipwrres14 at acpi0: P19X acpipwrres15 at acpi0: P06X acpipwrres16 at acpi0: P28T acpipwrres17 at acpi0: P18D acpipwrres18 at acpi0: P18T acpipwrres19 at acpi0: P3P3 acpipwrres20 at acpi0: P12T acpipwrres21 at acpi0: P28W acpipwrres22 at acpi0: P18W acpipwrres23 at acpi0: P12W acpipwrres24 at acpi0: P33W acpipwrres25 at acpi0: P33X acpitz at acpi0 not configured acpivideo0 at acpi0: GFX0 acpivout0 at acpivideo0: DD01 acpivout1 at acpivideo0: DD02 acpivout2 at acpivideo0: DD03 acpivout3 at acpivideo0: DD04 acpivout4 at acpivideo0: DD05 acpivout5 at acpivideo0: DD06 acpivout6 at acpivideo0: DD07 acpivout7 at acpivideo0: DD08 cpu0: using VERW MDS workaround cpu0: Enhanced SpeedStep 1440 MHz: speeds: 1441, 1440, 1360, 1280, 1200, 1120, 1040, 960, 880, 800, 720, 640, 560, 480 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Braswell Host" rev 0x22 "Intel HD Graphics" rev 0x22 at pci0 dev 2 function 0 not configured "Intel Braswell Power" rev 0x22 at pci0 dev 11 function 0 not configured xhci0 at pci0 dev 20 function 0 "Intel Braswell xHCI" rev 0x22: msi, xHCI 1.0 usb0 at xhci0: USB revision 3.0 uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 addr 1 "Intel Braswell TXE" rev 0x22 at pci0 dev 26 function 0 not configured pcib0 at pci0 dev 31 function 0 "Intel Braswell PCU LPC" rev 0x22 isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo com1 at isa0 port 0x2f8/8 irq 3: ns8250, no fifo com2 at isa0 port 0x3e8/8 irq 5: ns8250, no fifo pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd1 at pckbd0: console keyboard pcppi0 at isa0 port 0x61 spkr0 at pcppi0 vmm0 at mainbus0: VMX/EPT (using slow L1TF mitigation) efifb0 at mainbus0: 1366x768, 32bpp wsdisplay0 at efifb0 mux 1: console (std, vt100 emulation), using wskbd1 wskbd0: connecting to wsdisplay0 wsdisplay0: screen 1-5 added (std, vt100 emulation) dt: 443 probes sdmmc1: can't enable card scsibus1 at sdmmc0: 2 targets, initiator 0 sd0 at scsibus1 targ 1 lun 0: <Samsung, BGND3R, 0000> removable sd0: 29820MB, 512 bytes/sector, 61071360 sectors uvideo0 at uhub0 port 1 configuration 1 interface 0 "Chicony Electronics Co.,Ltd. USB2.0 VGA UVC WebCam" rev 2.00/95.56 addr 2 video0 at uvideo0 urtwn0 at uhub0 port 2 configuration 1 interface 0 "Realtek 802.11n NIC" rev 2.00/0.00 addr 3 urtwn0: MAC/BB RTL8188EU, RF 6052 1T1R, address d0:37:45:0f:67:55 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on sd0a (1b40eff0605df0cc.a) swap on sd0b dump on sd0b
