https://bugzilla.kernel.org/show_bug.cgi?id=210549
Bug ID: 210549
Summary: Dell Precision 3540: acpi_init takes 600 ms
Product: ACPI
Version: 2.5
Kernel Version: 5.9.11
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ACPICA-Core
Assignee: acpi_acpica-c...@kernel-bugs.osdl.org
Reporter: pmenzel+bugzilla.kernel....@molgen.mpg.de
Regression: No
Created attachment 294035
--> https://bugzilla.kernel.org/attachment.cgi?id=294035&action=edit
Linux 5.9.11 messages (output of `dmesg`)
On the Dell Precision 3540/0M14W7, BIOS 1.9.1 07/06/2020, `acpi_init()` takes
over 600 ms. That is 85 % of the Linux kernel start up to unpacking the initrd.
```
[ 0.000000] microcode: microcode updated early to revision 0xde, date =
2020-05-18
[ 0.000000] Linux version 5.9.0-4-amd64 (debian-ker...@lists.debian.org)
(gcc-10 (Debian 10.2.0-19) 10.2.0, GNU ld (GNU Binutils for Debian) 2.35.1) #1
SMP Debian 5.9.11-1 (2020-11-27)
[…]
[ 0.143609] ACPI: Added _OSI(Module Device)
[ 0.143609] ACPI: Added _OSI(Processor Device)
[ 0.143609] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.143609] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.143609] ACPI: Added _OSI(Linux-Dell-Video)
[ 0.143609] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 0.143609] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[ 0.187737] ACPI: 12 ACPI AML tables successfully acquired and loaded
[ 0.251625] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[ 0.260957] ACPI: Dynamic OEM Table Load:
[ 0.260963] ACPI: SSDT 0xFFFF90A081E92500 0000F4 (v02 PmRef Cpu0Psd
00003000 INTL 20160527)
[ 0.262517] ACPI: \_SB_.PR00: _OSC native thermal LVT Acked
[ 0.263717] ACPI: Dynamic OEM Table Load:
[ 0.263724] ACPI: SSDT 0xFFFF90A081EAEC00 000400 (v02 PmRef Cpu0Cst
00003001 INTL 20160527)
[ 0.265231] ACPI: Dynamic OEM Table Load:
[ 0.265236] ACPI: SSDT 0xFFFF909B0739C000 000560 (v02 PmRef Cpu0Ist
00003000 INTL 20160527)
[ 0.266688] ACPI: Dynamic OEM Table Load:
[ 0.266691] ACPI: SSDT 0xFFFF90A081EFDC00 00011B (v02 PmRef Cpu0Hwp
00003000 INTL 20160527)
[ 0.267949] ACPI: Dynamic OEM Table Load:
[ 0.267955] ACPI: SSDT 0xFFFF909B0739D000 000724 (v02 PmRef HwpLvt
00003000 INTL 20160527)
[ 0.269506] ACPI: Dynamic OEM Table Load:
[ 0.269511] ACPI: SSDT 0xFFFF909B07399800 0005FC (v02 PmRef ApIst
00003000 INTL 20160527)
[ 0.270736] ACPI: Dynamic OEM Table Load:
[ 0.270740] ACPI: SSDT 0xFFFF90A081EABC00 000317 (v02 PmRef ApHwp
00003000 INTL 20160527)
[ 0.271957] ACPI: Dynamic OEM Table Load:
[ 0.271962] ACPI: SSDT 0xFFFF909B07D57000 000AB0 (v02 PmRef ApPsd
00003000 INTL 20160527)
[ 0.273645] ACPI: Dynamic OEM Table Load:
[ 0.273649] ACPI: SSDT 0xFFFF90A081EAB800 00030A (v02 PmRef ApCst
00003000 INTL 20160527)
[ 0.277047] ACPI: EC: EC started
[ 0.277047] ACPI: EC: interrupt blocked
[ 0.290401] ACPI: EC: EC_CMD/EC_SC=0x934, EC_DATA=0x930
[ 0.290403] ACPI: \_SB_.PCI0.LPCB.ECDV: Boot DSDT EC used to handle
transactions
[ 0.290404] ACPI: Interpreter enabled
[ 0.290440] ACPI: (supports S0 S3 S4 S5)
[ 0.290441] ACPI: Using IOAPIC for interrupt routing
[…]
[ 0.743154] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 10 11 12 14 15) *0
[ 0.756402] ACPI: EC: interrupt unblocked
[ 0.756402] ACPI: EC: event unblocked
[ 0.756409] ACPI: EC: EC_CMD/EC_SC=0x934, EC_DATA=0x930
[ 0.756409] ACPI: EC: GPE=0x6e
[ 0.756411] ACPI: \_SB_.PCI0.LPCB.ECDV: Boot DSDT EC initialization complete
[ 0.756411] ACPI: \_SB_.PCI0.LPCB.ECDV: EC: Used to handle transactions and
events
[…]
[ 0.795501] Trying to unpack rootfs image as initramfs...
```
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