Re: Linux 3.11-rc2 (acpi backlight)

[JÃrg Otte]

2013/7/24 Rafael J. Wysocki <rjw@xxxxxxx>:
> On Tuesday, July 23, 2013 11:46:29 AM Kamal Mostafa wrote:
>> On Mon, 2013-07-22 at 21:54 +0200, Rafael J. Wysocki wrote:
>> > On Monday, July 22, 2013 11:11:54 AM Linus Torvalds wrote:
>> > > On Mon, Jul 22, 2013 at 6:02 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
>> > > >
>> > > > Linus, do you want me to send a pull request reverting 8c5bd7a and efaa14c?
>> > >
>> > > Yes, but [...] I'd suggest doing the revert just in time for
>> > > rc3, but waiting until then to gather info about people who see
>> > > breakage.
>> > >
>> > > Sound like a plan?
>> >
>> > Yes, it does.
>> >
>> > Rafael
>>
>>
>> Hi Rafael-
>>
>> For your reference...
>>
>> As James Hogan reported, those ACPI changes break backlight control on
>> the "Dell XPS13" Ivy Bridge models (the Sandy Bridge XPS13 model is not
>> affected).
>>
>> I confirm that reverting 8c5bd7a and efaa14c fixes it again.
>
> Thanks!
>
> I'd like to collect some information on the systems having problems with those
> two commits (to see if they are similar somehow).
>
> It seems that one common symptom is that brightness cannot be controlled
> through function keys.  Is that correct for all of you?
Yes

>  If so, did you try
> any other way to control brightness, like a GUI-based?
Yes, it has no visible effect.

> Also, can you all please send me (a) the output of dmidecode and (b) the
> contents of /proc/cpuinfo from your systems?


# dmidecode 2.11
# SMBIOS entry point at 0xdae8b000
SMBIOS 2.7 present.
36 structures occupying 1727 bytes.
Table at 0x000E0B70.

Handle 0x0000, DMI type 4, 42 bytes
Processor Information
        Socket Designation: CPU Socket - U3E1
        Type: Central Processor
        Family: Core i7
        Manufacturer: Intel(R) Corporation
        ID: A9 06 03 00 FF FB EB BF
        Signature: Type 0, Family 6, Model 58, Stepping 9
        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 (FXSAVE and FXSTOR instructions supported)
                SSE (Streaming SIMD extensions)
                SSE2 (Streaming SIMD extensions 2)
                SS (Self-snoop)
                HTT (Multi-threading)
                TM (Thermal monitor supported)
                PBE (Pending break enabled)
        Version: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
        Voltage: 0.9 V
        External Clock: 100 MHz
        Max Speed: 2500 MHz
        Current Speed: 2500 MHz
        Status: Populated, Enabled
        Upgrade: Socket rPGA988B
        L1 Cache Handle: 0x0002
        L2 Cache Handle: 0x0003
        L3 Cache Handle: 0x0004
        Serial Number: To Be Filled By O.E.M.
        Asset Tag: To Be Filled By O.E.M.
        Part Number: To Be Filled By O.E.M.
        Core Count: 2
        Core Enabled: 2
        Thread Count: 4
        Characteristics:
                64-bit capable

Handle 0x0001, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L1-Cache
        Configuration: Enabled, Not Socketed, Level 1
        Operational Mode: Write Through
        Location: Internal
        Installed Size: 32 kB
        Maximum Size: 32 kB
        Supported SRAM Types:
                Unknown
        Installed SRAM Type: Unknown
        Speed: Unknown
        Error Correction Type: Parity
        System Type: Data
        Associativity: 8-way Set-associative

Handle 0x0002, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L1-Cache
        Configuration: Enabled, Not Socketed, Level 1
        Operational Mode: Write Through
        Location: Internal
        Installed Size: 32 kB
        Maximum Size: 32 kB
        Supported SRAM Types:
                Unknown
        Installed SRAM Type: Unknown
        Speed: Unknown
        Error Correction Type: Parity
        System Type: Instruction
        Associativity: 8-way Set-associative

Handle 0x0003, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L2-Cache
        Configuration: Enabled, Not Socketed, Level 2
        Operational Mode: Write Through
        Location: Internal
        Installed Size: 256 kB
        Maximum Size: 256 kB
        Supported SRAM Types:
                Unknown
        Installed SRAM Type: Unknown
        Speed: Unknown
        Error Correction Type: Multi-bit ECC
        System Type: Unified
        Associativity: 8-way Set-associative

Handle 0x0004, DMI type 7, 19 bytes
Cache Information
        Socket Designation: L3-Cache
        Configuration: Enabled, Not Socketed, Level 3
        Operational Mode: Write Back
        Location: Internal
        Installed Size: 3072 kB
        Maximum Size: 3072 kB
        Supported SRAM Types:
                Unknown
        Installed SRAM Type: Unknown
        Speed: Unknown
        Error Correction Type: Multi-bit ECC
        System Type: Unified
        Associativity: 12-way Set-associative

Handle 0x0005, DMI type 129, 8 bytes
OEM-specific Type
        Header and Data:
                81 08 05 00 01 01 02 01
        Strings:
                Intel_ASF
                Intel_ASF_001

Handle 0x0006, DMI type 131, 64 bytes
OEM-specific Type
        Header and Data:
                83 40 06 00 31 00 00 00 00 00 00 00 00 00 00 00
                F8 00 59 1E FF FF FF FF 01 20 00 00 00 00 08 00
                93 05 03 00 00 00 00 00 C8 00 FF FF 00 00 00 00
                00 00 00 00 60 00 00 00 76 50 72 6F 00 00 00 00

Handle 0x0007, DMI type 16, 23 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: None
        Maximum Capacity: 32 GB
        Error Information Handle: Not Provided
        Number Of Devices: 4

Handle 0x0008, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0007
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 4096 MB
        Form Factor: SODIMM
        Set: None
        Locator: ChannelA-DIMM0
        Bank Locator: BANK 0
        Type: DDR3
        Type Detail: Synchronous
        Speed: 1600 MHz
        Manufacturer: Hynix/Hyundai
        Serial Number: 31480B56
        Asset Tag: 9876543210
        Part Number: HMT351S6CFR8A-PB
        Rank: Unknown
        Configured Clock Speed: 1600 MHz

Handle 0x0009, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0007
        Error Information Handle: Not Provided
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: None
        Locator: ChannelA-DIMM1
        Bank Locator: BANK 1
        Type: Unknown
        Type Detail: None
        Speed: Unknown
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: 9876543210
        Part Number: Not Specified
        Rank: Unknown
        Configured Clock Speed: Unknown

Handle 0x000A, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0007
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 4096 MB
        Form Factor: SODIMM
        Set: None
        Locator: ChannelB-DIMM0
        Bank Locator: BANK 2
        Type: DDR3
        Type Detail: Synchronous
        Speed: 1600 MHz
        Manufacturer: Kingston
        Serial Number: AE20A7A4
        Asset Tag: 9876543210
        Part Number: 9905428-085.A00G
        Rank: Unknown
        Configured Clock Speed: 1600 MHz

Handle 0x000B, DMI type 17, 34 bytes
Memory Device
        Array Handle: 0x0007
        Error Information Handle: Not Provided
        Total Width: Unknown
        Data Width: Unknown
        Size: No Module Installed
        Form Factor: DIMM
        Set: None
        Locator: ChannelB-DIMM1
        Bank Locator: BANK 3
        Type: Unknown
        Type Detail: None
        Speed: Unknown
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Asset Tag: 9876543210
        Part Number: Not Specified
        Rank: Unknown
        Configured Clock Speed: Unknown

Handle 0x000C, DMI type 20, 35 bytes
Memory Device Mapped Address
        Starting Address: 0x00000000000
        Ending Address: 0x001FFFFFFFF
        Range Size: 8 GB
        Physical Device Handle: 0x0008
        Memory Array Mapped Address Handle: 0x000E
        Partition Row Position: 1
        Interleave Position: 1
        Interleaved Data Depth: 2

Handle 0x000D, DMI type 20, 35 bytes
Memory Device Mapped Address
        Starting Address: 0x00000000000
        Ending Address: 0x001FFFFFFFF
        Range Size: 8 GB
        Physical Device Handle: 0x0009
        Memory Array Mapped Address Handle: 0x000E
        Partition Row Position: 1
        Interleave Position: 2
        Interleaved Data Depth: 2

Handle 0x000E, DMI type 19, 31 bytes
Memory Array Mapped Address
        Starting Address: 0x00000000000
        Ending Address: 0x001FFFFFFFF
        Range Size: 8 GB
        Physical Array Handle: 0x0007
        Partition Width: 4

Handle 0x000F, DMI type 0, 24 bytes
BIOS Information
        Vendor: FUJITSU // Phoenix Technologies Ltd.
        Version: Version 1.09
        Release Date: 05/22/2012
        Address: 0xE0000
        Runtime Size: 128 kB
        ROM Size: 4096 kB
        Characteristics:
                PCI is supported
                PC Card (PCMCIA) is supported
                PNP is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                Boot from CD is supported
                Selectable boot is supported
                EDD is supported
                3.5"/720 kB floppy services are supported (int 13h)
                Print screen service is supported (int 5h)
                8042 keyboard services are supported (int 9h)
                Serial services are supported (int 14h)
                Printer services are supported (int 17h)
                CGA/mono video services are supported (int 10h)
                ACPI is supported
                USB legacy is supported
                BIOS boot specification is supported
                Function key-initiated network boot is supported
                Targeted content distribution is supported
                UEFI is supported
        BIOS Revision: 1.9

Handle 0x0010, DMI type 1, 27 bytes
System Information
        Manufacturer: FUJITSU
        Product Name: LIFEBOOK AH532
        Version:
        Serial Number: YLKV045679
        UUID: ABAF1C3F-6808-E211-9C17-5C9AD8692B39
        Wake-up Type: Power Switch
        SKU Number:
        Family:

Handle 0x0011, DMI type 2, 15 bytes
Base Board Information
        Manufacturer: FUJITSU
        Product Name: FJNBB1C
        Version:
        Serial Number: 578102-01R2602242
        Asset Tag:
        Features:
                Board is a hosting board
        Location In Chassis:
        Chassis Handle: 0x0000
        Type: Motherboard
        Contained Object Handles: 0

Handle 0x0012, DMI type 3, 22 bytes
Chassis Information
        Manufacturer: FUJITSU
        Type: Notebook
        Lock: Not Present
        Version:
        Serial Number: YLKV045679
        Asset Tag:
        Boot-up State: Unknown
        Power Supply State: Unknown
        Thermal State: Unknown
        Security Status: Unknown
        OEM Information: 0x00000000
        Height: Unspecified
        Number Of Power Cords: Unspecified
        Contained Elements: 0
        SKU Number: Not Specified

Handle 0x0013, DMI type 11, 5 bytes
OEM Strings
        String 1: fAjTCRFj91ObS
        String 2: 3gwdwbZfdahV4
        String 3: REFrSQarvBTce

Handle 0x0014, DMI type 12, 5 bytes
System Configuration Options
        Option 1: SMI:00B2C801
        Option 2: TIM:201307241127
        Option 3: HDD:           826KC34UT
        Option 4: MEM:HMT351S6CFR8A-PB  31480B56

Handle 0x0015, DMI type 13, 22 bytes
BIOS Language Information
        Language Description Format: Abbreviated
        Installable Languages: 7
                en-US
                fr-FR
                ja-JP
                ko-KR
                zh-CHT
                zh-CHS
                ru-RU
        Currently Installed Language: en-US

Handle 0x0016, DMI type 22, 26 bytes
Portable Battery
        Location: Internal Battery
        Manufacturer: FUJITSU
        Manufacture Date:
        Serial Number: CP5677170101120602120416006746
        Name: CP567717-01
        Chemistry: Lithium Ion
        Design Capacity: 47520 mWh
        Design Voltage: 10800 mV
        SBDS Version: V1.0
        Maximum Error: Unknown
        OEM-specific Information: 0x00000000

Handle 0x0017, DMI type 32, 11 bytes
System Boot Information
        Status: No errors detected

Handle 0x0018, DMI type 143, 16 bytes
OEM-specific Type
        Header and Data:
                8F 10 18 00 00 5F 46 4A 5F 4F 45 4D 5F 12 00 00

Handle 0x0019, DMI type 143, 8 bytes
OEM-specific Type
        Header and Data:
                8F 08 19 00 01 03 00 00

Handle 0x001A, DMI type 143, 11 bytes
OEM-specific Type
        Header and Data:
                8F 0B 1A 00 02 00 01 00 03 56 05

Handle 0x001B, DMI type 143, 11 bytes
OEM-specific Type
        Header and Data:
                8F 0B 1B 00 02 06 01 15 37 AF 0D

Handle 0x001C, DMI type 143, 11 bytes
OEM-specific Type
        Header and Data:
                8F 0B 1C 00 02 01 01 01 00 00 00

Handle 0x001D, DMI type 143, 11 bytes
OEM-specific Type
        Header and Data:
                8F 0B 1D 00 02 02 01 01 00 00 00

Handle 0x001E, DMI type 143, 11 bytes
OEM-specific Type
        Header and Data:
                8F 0B 1E 00 02 05 01 00 00 00 00

Handle 0x001F, DMI type 136, 6 bytes
OEM-specific Type
        Header and Data:
                88 06 1F 00 5A 5A

Handle 0x0020, DMI type 21, 7 bytes
Built-in Pointing Device
        Type: Other
        Interface: PS/2
        Buttons: 2

Handle 0x0021, DMI type 24, 5 bytes
Hardware Security
        Power-On Password Status: Disabled
        Keyboard Password Status: Not Implemented
        Administrator Password Status: Enabled
        Front Panel Reset Status: Not Implemented

Handle 0x0022, DMI type 15, 105 bytes
System Event Log
        Area Length: 114 bytes
        Header Start Offset: 0x0000
        Header Length: 16 bytes
        Data Start Offset: 0x0010
        Access Method: General-purpose non-volatile data functions
        Access Address: 0x00F0
        Status: Valid, Not Full
        Change Token: 0x00000006
        Header Format: Type 1
        Supported Log Type Descriptors: 41
        Descriptor 1: Single-bit ECC memory error
        Data Format 1: Multiple-event handle
        Descriptor 2: Multi-bit ECC memory error
        Data Format 2: Multiple-event handle
        Descriptor 3: Parity memory error
        Data Format 3: None
        Descriptor 4: Bus timeout
        Data Format 4: None
        Descriptor 5: I/O channel block
        Data Format 5: None
        Descriptor 6: Software NMI
        Data Format 6: None
        Descriptor 7: POST memory resize
        Data Format 7: None
        Descriptor 8: POST error
        Data Format 8: POST results bitmap
        Descriptor 9: PCI parity error
        Data Format 9: None
        Descriptor 10: PCI system error
        Data Format 10: None
        Descriptor 11: CPU failure
        Data Format 11: None
        Descriptor 12: EISA failsafe timer timeout
        Data Format 12: None
        Descriptor 13: Correctable memory log disabled
        Data Format 13: None
        Descriptor 14: Logging disabled
        Data Format 14: None
        Descriptor 15: System limit exceeded
        Data Format 15: None
        Descriptor 16: Asynchronous hardware timer expired
        Data Format 16: None
        Descriptor 17: System configuration information
        Data Format 17: None
        Descriptor 18: Hard disk information
        Data Format 18: None
        Descriptor 19: System reconfigured
        Data Format 19: None
        Descriptor 20: Uncorrectable CPU-complex error
        Data Format 20: None
        Descriptor 21: Log area reset/cleared
        Data Format 21: None
        Descriptor 22: System boot
        Data Format 22: None
        Descriptor 23: OEM-specific
        Data Format 23: None
        Descriptor 24: OEM-specific
        Data Format 24: None
        Descriptor 25: OEM-specific
        Data Format 25: None
        Descriptor 26: OEM-specific
        Data Format 26: None
        Descriptor 27: OEM-specific
        Data Format 27: None
        Descriptor 28: OEM-specific
        Data Format 28: None
        Descriptor 29: OEM-specific
        Data Format 29: None
        Descriptor 30: OEM-specific
        Data Format 30: None
        Descriptor 31: OEM-specific
        Data Format 31: None
        Descriptor 32: OEM-specific
        Data Format 32: None
        Descriptor 33: OEM-specific
        Data Format 33: None
        Descriptor 34: OEM-specific
        Data Format 34: None
        Descriptor 35: OEM-specific
        Data Format 35: None
        Descriptor 36: OEM-specific
        Data Format 36: None
        Descriptor 37: OEM-specific
        Data Format 37: None
        Descriptor 38: OEM-specific
        Data Format 38: None
        Descriptor 39: OEM-specific
        Data Format 39: None
        Descriptor 40: OEM-specific
        Data Format 40: None
        Descriptor 41: OEM-specific
        Data Format 41: None

Handle 0xFEFF, DMI type 127, 4 bytes
End Of Table

~$ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
stepping        : 9
microcode       : 0x12
cpu MHz         : 1875.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor
ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic
popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat
epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
fsgsbase smep erms
bogomips        : 4989.01
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
stepping        : 9
microcode       : 0x12
cpu MHz         : 1625.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 1
initial apicid  : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor
ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic
popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat
epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
fsgsbase smep erms
bogomips        : 4989.01
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 2
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
stepping        : 9
microcode       : 0x12
cpu MHz         : 1700.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 1
cpu cores       : 2
apicid          : 2
initial apicid  : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor
ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic
popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat
epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
fsgsbase smep erms
bogomips        : 4989.01
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
stepping        : 9
microcode       : 0x12
cpu MHz         : 1675.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 1
cpu cores       : 2
apicid          : 3
initial apicid  : 3
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor
ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic
popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat
epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
fsgsbase smep erms
bogomips        : 4989.01
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:
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