Hi,
I'll try describing my problem in detail to hopefully avoid
back-and-forth questions, please excuse my prolixity.
I have a Toshiba L300 21C (output dmidecode attached) with an Insyde H2O
(latest version from Toshiba as of today), which according to their site
is an EFI implementation, but which looks and behaves like a legacy
BIOS, so I assume it's a thin CSM on top of EFI.
Linux booted OK, but had a non-working thermal zone which always replied
a temperature of 0C (though the coretemp module worked ok) and an
apparently non-working fan interface which always seemed ON and didn't
respond to
'echo 3 > /proc/acpi/fan/FAN/state' (kernel logged the usual "failed to
transition to D3" message).
The fan also didn't seem to react to the processor temperature, suddenly
springing to full-power when it reached the 80C trip point (which wasn't
even reported in trip_points) and never switching off again.
These problems manifested with 2.6.2{6,8,9-rc7}.
I suspected there could be some problems in the thermal zone definition
so I tried the DSDT (both original and new version attached).
This was my first attempt at reading the ACPI spec and coding ASL, so
please bear with me if my assumptions are completely off-mark.
Opening the DSDT it became obvious that the FAN declaration was bogus,
always returning ON and not implementing the _ON and _OFF methods.
The next step was debugging the temperature problem, since it seemed to
be an awful big chunk of code to be simply useless, and the fan problem
seemed harder to find now that I didn't know where else to look.
While I was stumbling with the _TMP method and adding debugging output
all around the code, the fan suddenly became responsive during one of
the boot cycles.
I traced it back to reading from any field inside the EC
OperationRegion, through a "Store(\_SB.PCI0.LPC.EC0.FNST, Debug)" (I
started with FNST because it looked like it might mean "fan status", but
reading from other fields also reliably triggered the same behavior).
FNST itself seems to return 0 in all situations I tried, so I still
don't know what it actually stands for.
At this point I also got the _TMP method working, albeit with an
apparent temperature skew of a few degrees in relation to the temps
reported by coretemp, but this wasn't so important as the fan problem.
Debugging blindly a bit further I noticed whenever the fan crossed the
35C/50C/60C/80C barriers (again: not the same as trip_points) the _Q11
method got called and this seemed to adjust the fan speed to whatever
speed was appropriate.
Changing just the "Store(\_SB.PCI0.LPC.EC0.FNST, Debug)" line to read
from some other value not inside the EC made this stop working.
Another interesting characteristic: it stopped working after a full
suspend-resume cycle, but continued to work when put through all the
test levels in /sys/power/pm-test, only stopping when we actually cut
the power and entered S3 proper.
To "fix" this I made the fan's _PSC method call _Q11() and read from the
EC, which seemed to keep things working through suspend-resume.
Right now everything seems to be working almost perfectly, though I have
seen the fan control stop working and only jerk back into action after a
suspend-resume cycle, without being able to reproduce the failure reliably.
I'm totally aware that this is far from a perfect solution and was - in
fact - just a fluke.
My questions are:
- am I right in assuming the EC could be playing behind ACPI's back and
controlling the fan speed by itself, only depending on ACPI to react
when issued the _Q11 event? Or did I completely misunderstand the way
the _Qxx methods are supposed to work?
- should this problem be understood as a failure in the DSDT for not
explicitly initializing something; a failure in ACPI for not implicitly
initializing something or a failure in the hardware/BIOS for depending
on partially non-ACPI behavior to control fan speed?
- what would be the "least wrong" way of solving this problem?
Cheers and thanks for the lesson (if anyone had the patience to read
this whole thing... :) )
--
*Leo Antunes*
Attachment:
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# dmidecode 2.9 SMBIOS 2.4 present. 35 structures occupying 1489 bytes. Table at 0x000E8150. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: INSYDE Version: 1.60 Release Date: 12/23/2008 ROM Size: 1024 kB Characteristics: PCI is supported BIOS is upgradeable BIOS shadowing is allowed Boot from CD is supported Selectable boot is supported BIOS ROM is socketed EDD is supported Japanese floppy for NEC 9800 1.2 MB is supported (int 13h) Japanese floppy for Toshiba 1.2 MB is supported (int 13h) 5.25"/360 KB floppy services are supported (int 13h) 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 KB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) 8042 keyboard services are supported (int 9h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported Targeted content distribution is supported Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: TOSHIBA Product Name: Satellite L300 Version: PSLB8E-0H301VGR Serial Number: 19027396Q UUID: 0A80D6A0-D6C5-11DD-A70E-001E338F4BA5 Wake-up Type: Power Switch SKU Number: Montevina_Fab Family: Intel_Mobile Handle 0x0002, DMI type 2, 16 bytes Base Board Information Manufacturer: TOSHIBA Product Name: Portable PC Version: Base Board Version Serial Number: Base Board Serial Number Asset Tag: Base Board Asset Tag Features: Board is a hosting board Board is replaceable Location In Chassis: Base Board Chassis Location Chassis Handle: 0x0003 Type: Motherboard Contained Object Handles: 0 Handle 0x0003, DMI type 3, 22 bytes Chassis Information Manufacturer: Chassis Manufacturer Type: Notebook Lock: Not Present Version: Chassis Version Serial Number: Chassis Serial Number Asset Tag: No Asset Tag Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000000 Height: Unspecified Number Of Power Cords: 1 Contained Elements: 0 Handle 0x0004, DMI type 5, 20 bytes Memory Controller Information Error Detecting Method: None Error Correcting Capabilities: None Supported Interleave: One-way Interleave Current Interleave: One-way Interleave Maximum Memory Module Size: 4096 MB Maximum Total Memory Size: 8192 MB Supported Speeds: Other Supported Memory Types: Other Memory Module Voltage: Unknown Associated Memory Slots: 2 0x0000 0x0000 Enabled Error Correcting Capabilities: None Handle 0x0005, DMI type 9, 13 bytes System Slot Information Designation: J6B2 Type: x16 PCI Express Current Usage: Available Length: Other ID: 0 Characteristics: PME signal is supported Hot-plug devices are supported Handle 0x0006, DMI type 9, 13 bytes System Slot Information Designation: J6B1 Type: x1 PCI Express Current Usage: Available Length: Other ID: 0 Characteristics: PME signal is supported Hot-plug devices are supported Handle 0x0007, DMI type 9, 13 bytes System Slot Information Designation: J6C2 Type: x1 PCI Express Current Usage: Available Length: Other ID: 1 Characteristics: PME signal is supported Hot-plug devices are supported Handle 0x0008, DMI type 9, 13 bytes System Slot Information Designation: J7B1 Type: x1 PCI Express Current Usage: Available Length: Other ID: 2 Characteristics: PME signal is supported Hot-plug devices are supported Handle 0x0009, DMI type 9, 13 bytes System Slot Information Designation: J8B3 Type: x1 PCI Express Current Usage: Available Length: Other ID: 3 Characteristics: PME signal is supported Hot-plug devices are supported Handle 0x000A, DMI type 9, 13 bytes System Slot Information Designation: J8D1 Type: x1 PCI Express Current Usage: Available Length: Other ID: 4 Characteristics: PME signal is supported Hot-plug devices are supported Handle 0x000B, DMI type 11, 5 bytes OEM Strings String 1: SSLB8E0H301VGR String 2: String 3: String 4: String 5: SSLB8E0H301VGR Handle 0x000C, DMI type 12, 5 bytes System Configuration Options Option 1: NVR:00707002 Option 2: DSN:K61DT8C2BKT4 Option 3: DSN:16HTF25664HY-800E1E81D8954 Option 4: DSN:4D0F3E37 Handle 0x000D, DMI type 15, 29 bytes System Event Log Area Length: 32672 bytes Header Start Offset: 0x0000 Data Start Offset: 0x0000 Access Method: General-purpose non-volatile data functions Access Address: 0x0000 Status: Valid, Not Full Change Token: 0x12345678 Header Format: OEM-specific Supported Log Type Descriptors: 3 Descriptor 1: POST memory resize Data Format 1: None Descriptor 2: POST error Data Format 2: POST results bitmap Descriptor 3: Log area reset/cleared Data Format 3: None Handle 0x000E, DMI type 21, 7 bytes Built-in Pointing Device Type: Touch Pad Interface: PS/2 Buttons: 4 Handle 0x000F, DMI type 27, 14 bytes Cooling Device Type: Fan Status: OK OEM-specific Information: 0x00000000 Nominal Speed: 43690 rpm Handle 0x0010, DMI type 32, 20 bytes System Boot Information Status: No errors detected Handle 0x0011, DMI type 39, 22 bytes System Power Supply Location: OEM_Define0 Name: OEM_Define1 Manufacturer: OEM_Define2 Serial Number: OEM_Define2 Asset Tag: OEM_Define3 Model Part Number: OEM_Define4 Revision: OEM_Define5 Max Power Capacity: 0.075 W Status: Present, OK Type: Regulator Input Voltage Range Switching: Auto-switch Plugged: No Hot Replaceable: No Handle 0x0012, DMI type 129, 5 bytes OEM-specific Type Header and Data: 81 05 12 00 4F Strings: em Test 1 Oem Test 2 Handle 0x0013, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 8 GB Error Information Handle: No Error Number Of Devices: 2 Handle 0x0014, DMI type 6, 12 bytes Memory Module Information Socket Designation: DIMM0 Bank Connections: 0 0 Current Speed: 1 ns Type: None Installed Size: 2048 MB (Single-bank Connection) Enabled Size: 2048 MB (Single-bank Connection) Error Status: OK Handle 0x0015, DMI type 17, 27 bytes Memory Device Array Handle: 0x0013 Error Information Handle: 0x0016 Total Width: 64 bits Data Width: 64 bits Size: 2048 MB Form Factor: SODIMM Set: None Locator: DIMM0 Bank Locator: BANK 0 Type: DDR2 Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: Micron Serial Number: E81D8978 Asset Tag: Unknown Part Number: 787878787878787878787878787878787878 Handle 0x0016, DMI type 18, 23 bytes 32-bit Memory Error Information Type: OK Granularity: Unknown Operation: Unknown Vendor Syndrome: Unknown Memory Array Address: Unknown Device Address: Unknown Resolution: Unknown Handle 0x0017, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0007FFFFFFF Range Size: 2 GB Physical Device Handle: 0x0015 Memory Array Mapped Address Handle: 0x001D Partition Row Position: Unknown Interleave Position: 1 Interleaved Data Depth: 1 Handle 0x0018, DMI type 6, 12 bytes Memory Module Information Socket Designation: DIMM2 Bank Connections: 0 0 Current Speed: 1 ns Type: None Installed Size: 2048 MB (Single-bank Connection) Enabled Size: 2048 MB (Single-bank Connection) Error Status: OK Handle 0x0019, DMI type 17, 27 bytes Memory Device Array Handle: 0x0013 Error Information Handle: 0x001A Total Width: 64 bits Data Width: 64 bits Size: 2048 MB Form Factor: SODIMM Set: None Locator: DIMM2 Bank Locator: BANK 2 Type: DDR2 Type Detail: Synchronous Speed: 667 MHz (1.5 ns) Manufacturer: Micron Serial Number: E7236BD9 Asset Tag: Unknown Part Number: D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9 Handle 0x001A, DMI type 18, 23 bytes 32-bit Memory Error Information Type: OK Granularity: Unknown Operation: Unknown Vendor Syndrome: Unknown Memory Array Address: Unknown Device Address: Unknown Resolution: Unknown Handle 0x001B, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0007FFFFFFF Range Size: 2 GB Physical Device Handle: 0x0019 Memory Array Mapped Address Handle: 0x001D Partition Row Position: Unknown Interleave Position: 2 Interleaved Data Depth: 1 Handle 0x001C, DMI type 18, 23 bytes 32-bit Memory Error Information Type: OK Granularity: Unknown Operation: Unknown Vendor Syndrome: Unknown Memory Array Address: Unknown Device Address: Unknown Resolution: Unknown Handle 0x001D, DMI type 19, 15 bytes Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x000FFFFFFFF Range Size: 4 GB Physical Array Handle: 0x0013 Partition Width: 0 Handle 0x001E, DMI type 4, 35 bytes Processor Information Socket Designation: CPU Type: Central Processor Family: Pentium M Manufacturer: Intel(R) Corporation ID: FD 06 00 00 FF FB EB BF Signature: Type 0, Family 6, Model 15, Stepping 13 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction supported) PAT (Page attribute table) PSE-36 (36-bit page size extension) CLFSH (CLFLUSH instruction supported) DS (Debug store) ACPI (ACPI supported) MMX (MMX technology supported) FXSR (Fast floating-point save and restore) SSE (Streaming SIMD extensions) SSE2 (Streaming SIMD extensions 2) SS (Self-snoop) HTT (Hyper-threading technology) TM (Thermal monitor supported) PBE (Pending break enabled) Version: Intel(R) Pentium(R) Dual CPU T3400 @ 2.16GHz Voltage: 1.6 V External Clock: 667 MHz Max Speed: 2166 MHz Current Speed: 1000 MHz Status: Populated, Enabled Upgrade: <OUT OF SPEC> L1 Cache Handle: 0x0021 L2 Cache Handle: 0x001F L3 Cache Handle: Not Provided Serial Number: Not Specified Asset Tag: FFFF Part Number: Not Specified Handle 0x001F, DMI type 7, 19 bytes Cache Information Socket Designation: Unknown Configuration: Enabled, Not Socketed, Level 2 Operational Mode: Write Back Location: Internal Installed Size: 1024 KB Maximum Size: 1024 KB Supported SRAM Types: Synchronous Installed SRAM Type: Synchronous Speed: Unknown Error Correction Type: Single-bit ECC System Type: Unified Associativity: 4-way Set-associative Handle 0x0020, DMI type 7, 19 bytes Cache Information Socket Designation: Unknown Configuration: Enabled, Not Socketed, Level 1 Operational Mode: Write Back Location: Internal Installed Size: 32 KB Maximum Size: 32 KB Supported SRAM Types: Synchronous Installed SRAM Type: Synchronous Speed: Unknown Error Correction Type: Single-bit ECC System Type: Instruction Associativity: 8-way Set-associative Handle 0x0021, DMI type 7, 19 bytes Cache Information Socket Designation: Unknown Configuration: Enabled, Not Socketed, Level 1 Operational Mode: Write Back Location: Internal Installed Size: 32 KB Maximum Size: 32 KB Supported SRAM Types: Synchronous Installed SRAM Type: Synchronous Speed: Unknown Error Correction Type: Single-bit ECC System Type: Data Associativity: 8-way Set-associative Handle 0x0022, DMI type 127, 4 bytes End Of Table
