Re: Boot failure on XPS 13/9380 (but bsd.rd works)

[chohag]

I'd quite like to debug this problem. I'm looking through the code
now to find out where I can inject some sort of printf-like statement
to glean some information about what it's [not] doing and may eventually
even get somewhere.

I'll continue to do this regardless because I'm bored and I just
spent a crapload of money on this thing and I'll be damned if it's
going to not work on me and I want to use _this_ OS goddamnit, but
if anyone can point me to resources to read or other hints about
how to debug code running at such a low level before the OS has had
a chance to take over, they would be greatly appreciated. I've been
coddled for a long time and working on the bare metal like this is
alien to me.

Thanks,

Matthew

ps. Apologies if the list threading is screwed up. I can't reply
to my own messages apparently.

Boot failure on XPS 13/9380 (but bsd.rd works)

[chohag]

As per the subject, bsd.rd boots and the installation proceeded as
usual. Another laptop saved from ever booting the mess it came
preinstalled with. Yay.

Subsequently rebooting results in the following (bsd.sp does the
same with different addresses):

probing: pc0 mem[632K 475M 255M 208M 137M 150080M]
disk: hd0
>> OpenBSD/amd64 BOOTX64 3.46
boot>
booting hd0a:/bsd: 12748104+2941960+34+0+708608 [986153/


I tried booting the 6.5 installer to see if I could find a point
between in which it broke but it stops every time after the kernel's
penultimate line (between 'scsibus2 at softraid0: 256 targets' and
reporting the root device).

Interestingly 6.6 also did this once which was seemingly related
to having warm-booted immediately prior but it only did it the once
whereas 6.5 seems to be consistent. Nevertheless I wasn't paying
attention to what the 6.6 installer was doing at the time so I'll
look into that some more.

I traced the boot process through to loadfile in libsa so I know
that it's stuck while reading the ELF symbols (it gets at least as
far as the first PROGRESS line after "Now load the symbol sections
themselves") but that's probably obvious to whoever knows the boot
code. Personally I haven't much clue what should be happening and
it's clearly not happening as it should anyway so I don't know what
to poke at to get more clues to fall out.

The below was extracted by running sendbug -P from within the
installed OS (chroot) while running the 6.6 bsd.rd and then doing
whatever crazy thing I'm going to need to do to get them onto here.
It complained about a lack of /var/db/acpi/* so if they're useful
and can be generated from the ramdisk kernel then I can get them
too. The dmesg is from the installer's /var.

Matthew


OpenBSD 6.6 (RAMDISK_CD) #349: Sat Oct 12 11:03:52 MDT 2019
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_CD
real mem = 16924401664 (16140MB)
avail mem = 16407494656 (15647MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.2 @ 0xe (101 entries)
bios0: vendor Dell Inc. version "1.5.0" date 06/03/2019
bios0: Dell Inc. XPS 13 9380
acpi0 at bios0: ACPI 6.1
acpi0: tables DSDT FACP APIC FPDT FIDT MCFG SSDT BOOT SSDT HPET SSDT SSDT UEFI 
LPIT SSDT SSDT DBGP DBG2 SSDT SSDT MSDM SLIC DMAR SSDT NHLT TPM2 BGRT
acpimadt0 at acpi0 addr 0xfee0: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz, 7517.90 MHz, 06-8e-0c
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,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: apic clock running at 24MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE
cpu at mainbus0: not configured
cpu at mainbus0: not configured
cpu at mainbus0: not configured
ioapic0 at mainbus0: apid 2 pa 0xfec0, version 20, 120 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG0)
acpiprt2 at acpi0: bus -1 (PEG1)
acpiprt3 at acpi0: bus -1 (PEG2)
acpiprt4 at acpi0: bus -1 (RP01)
acpiprt5 at acpi0: bus -1 (RP02)
acpiprt6 at acpi0: bus -1 (RP03)
acpiprt7 at acpi0: bus -1 (RP04)
acpiprt8 at acpi0: bus 1 (RP05)
acpiprt9 at acpi0: bus -1 (RP06)
acpiprt10 at acpi0: bus 2 (RP07)
acpiprt11 at acpi0: bus -1 (RP08)
acpiprt12 at acpi0: bus -1 (RP09)
acpiprt13 at acpi0: bus -1 (RP10)
acpiprt14 at acpi0: bus -1 (RP11)
acpiprt15 at acpi0: bus -1 (RP12)
acpiprt16 at acpi0: bus 3 (RP13)
acpiprt17 at acpi0: bus -1 (RP14)
acpiprt18 at acpi0: bus -1 (RP15)
acpiprt19 at acpi0: bus -1 (RP16)
acpiprt20 at acpi0: bus -1 (RP17)
acpiprt21 at acpi0: bus -1 (RP18)
acpiprt22 at acpi0: bus -1 (RP19)
acpiprt23 at acpi0: bus -1 (RP20)
acpiprt24 at acpi0: bus -1 (RP21)
acpiprt25 at acpi0: bus -1 (RP22)
acpiprt26 at acpi0: bus -1 (RP23)
acpiprt27 at acpi0: bus -1 (RP24)
acpiec0 at acpi0
acpiec at acpi0 not configured
acpipwrres at acpi0 not configured
acpipwrres at acpi0 not configured
acpipwrres at acpi0 not configured
acpipwrres at acpi0 not configured
acpipwrres at acpi0 not configured
acpipwrres at acpi0 not configured
acpicpu at acpi0 not configured
acpitz at acpi0 not configured
acpipwrres at acpi0 not configured
"PNP0A08" at acpi0 not configured
acpicmos0 at acpi0
"INT3403" at acpi0 not configured
"INT3403" at acpi0 not configured
"INT3403" at acpi0 not configured
"INT3403" at acpi0 not configured
"INT3403" at acpi0 not configured
"INT34BB" at acpi0 not configured
"ELAN2930" at acpi0 not configured
"DELL08AF" at acpi0 not configured
"INT3403" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured