https://bugzilla.kernel.org/show_bug.cgi?id=203431
Bug ID: 203431
Summary: Dell Inspiron 5485 (Ryzen 3700U) doesn't boot without
acpi=off
Product: ACPI
Version: 2.5
Kernel Version: 5.0.9
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Processors
Assignee: acpi_config-process...@kernel-bugs.osdl.org
Reporter: adam.grigol...@balcora.net
Regression: No
A very new laptop,
Same issue shows up with every kernel tried,
kernel versions tested 4.19, 4.20, 5.0.7, 5.0.8, 5.0.9, 5.1-rc4
All results in a null pointer dereference.
traceback pointing at setup_boot_APIC_clock.
If booted with nolapic, it does get a little further, but dies as well, but
differently (and still apparently related to the CPU's by the seems); I'll get
some further information of the actual error here and post it).
A little bit of digging through ACPI has shown some oddities.
the APIC table describes 16 lapics and 16 nmi's for only 8 cpus.
(The LAPIC entries after id7 have enabled = 0).
As well as this, the CPU has an entirely new model (Family 23 / Model 24).
As well as this;
Even with ACPI disabled, some instability occurs, especially in the ath10k_usb
module, which seems to become a little flakey without
"nospec_store_bypass_disable" in kernel params.
Also, nomodeset is required, but this may be because the ACPI tables aren't
loaded (assumed based on acpi tables in the dumps that look related to GPU).
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