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I am running a dual boot Windows 7/Ubuntu 13.10 on a HP dv7t-4100 PC, with grub2 reinstalled through boot-repair in Linux.

Occasionally I cannot boot into Linux - and even have trouble in Windows.

When I boot Linux in recovery mode, it freezes at the line:

smpboot: Booting Node 0, Processors #1

immediately preceding that line I see:

perf_event_intel: CPU erratum AAJ80 worked around 
perf_event_intel: CPUID merkedevent: 'bus cycles' unavailable

I read that there is known bug in Intel's i7 Nehalem processors, I think that is the "CPU erratum AAJ80 worked around"

I added "reboot-bios" to GRUB_CMDLINE_LINUX_DEFAULT and I think it's working a little better.

I do not want to add max-cpus=1

Sometimes it seems that by booting into Windows AND installing updates fixes the problem.

After a successful boot lscpu shows all 8 cpus.

I am thinking about ditching grub for coreboot (instead of UEFI) but such a fundamental change makes me nervous. There is apparrently a UEFI driver by HP for my model.

Also, I read about the grub-coreboot-bin package for Ubuntu, but I'm not sure what it does?

Also I cannot find my laptop model, motherboard or chipset in the list of supported devices for coreboot v4, v3 or v1, which adds my anxiety unless someone can tell me it will work.

[note: I could not add the "coreboot" tag I don't have enuf cred]

lspci:

00:00.0 Host bridge: Intel Corporation Core Processor DMI (rev 11)
00:03.0 PCI bridge: Intel Corporation Core Processor PCI Express Root Port 1 (rev 11)
00:08.0 System peripheral: Intel Corporation Core Processor System Management Registers (rev 11)
00:08.1 System peripheral: Intel Corporation Core Processor Semaphore and Scratchpad Registers (rev 11)
00:08.2 System peripheral: Intel Corporation Core Processor System Control and Status Registers (rev 11)
00:08.3 System peripheral: Intel Corporation Core Processor Miscellaneous Registers (rev 11)
00:10.0 System peripheral: Intel Corporation Core Processor QPI Link (rev 11)
00:10.1 System peripheral: Intel Corporation Core Processor QPI Routing and Protocol Registers (rev 11)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Madison [Mobility Radeon HD 5650/5750 / 6530M/6550M]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Redwood HDMI Audio [Radeon HD 5000 Series]
02:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)
7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-Core Registers (rev 04)
7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 04)
7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 04)
7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 04)
7f:03.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller (rev 04)
7f:03.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Target Address Decoder (rev 04)
7f:03.4 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Test Registers (rev 04)
7f:04.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Control Registers (rev 04)
7f:04.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Address Registers (rev 04)
7f:04.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Rank Registers (rev 04)
7f:04.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Thermal Control Registers (rev 04)
7f:05.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Control Registers (rev 04)
7f:05.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Address Registers (rev 04)
7f:05.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Rank Registers (rev 04)
7f:05.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Thermal Control Registers (rev 04)

dmidecode:

# dmidecode 2.12
SMBIOS 2.6 present.
33 structures occupying 1675 bytes.
Table at 0x000E94C0.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
    Vendor: Hewlett-Packard
    Version: F.29
    Release Date: 11/07/2011
    ROM Size: 1536 kB
    Characteristics:
        PCI is supported
        BIOS is upgradeable
        BIOS shadowing is allowed
        Boot from CD is supported
        Selectable boot is supported
        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
        BIOS boot specification is supported
        Targeted content distribution is supported
    BIOS Revision: 15.41
    Firmware Revision: 101.56

Handle 0x0001, DMI type 1, 27 bytes
System Information
    Manufacturer: Hewlett-Packard
    Product Name: HP Pavilion dv7 Notebook PC
    Version: 0589110000242B20010020100
    Serial Number: CNF0486MK9
    UUID: 30464E43-3834-4D36-4B39-78ACC043F21F
    Wake-up Type: Power Switch
    SKU Number: WW181AV
    Family: 103C_5335KV

Handle 0x0002, DMI type 2, 16 bytes
Base Board Information
    Manufacturer: Hewlett-Packard
    Product Name: 1449
    Version: 65.38
    Serial Number: PL61Z011ZZR05D     
    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: Hewlett-Packard
    Type: Notebook
    Lock: Not Present
    Version: N/A
    Serial Number: None
    Asset Tag:                     
    Boot-up State: Safe
    Power Supply State: Safe
    Thermal State: Safe
    Security Status: None
    OEM Information: 0x0000022B
    Height: Unspecified
    Number Of Power Cords: 1
    Contained Elements: 0
    SKU Number: Not Specified

Handle 0x0004, DMI type 9, 17 bytes
System Slot Information
    Designation: PCI Express Graphic X16
    Type: x16 PCI Express x16
    Current Usage: Available
    Length: Other
    ID: 0
    Characteristics:
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0000:00:01.0

Handle 0x0005, DMI type 9, 17 bytes
System Slot Information
    Designation: PCI Express X1-0
    Type: x1 PCI Express x1
    Current Usage: Available
    Length: Other
    ID: 0
    Characteristics:
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0000:00:1c.0

Handle 0x0006, DMI type 9, 17 bytes
System Slot Information
    Designation: PCI Express X1-1
    Type: x1 PCI Express x1
    Current Usage: Available
    Length: Other
    ID: 1
    Characteristics:
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0000:00:1c.1

Handle 0x0007, DMI type 10, 6 bytes
On Board Device Information
    Type: Video
    Status: Enabled
    Description: Video Graphics Controller

Handle 0x0008, DMI type 10, 6 bytes
On Board Device Information
    Type: Ethernet
    Status: Enabled
    Description: Realtek Lan Controller

Handle 0x0009, DMI type 11, 5 bytes
OEM Strings
    String 1: $HP$
    String 2: LOC#ABA
    String 3: ABS 70/71 79 7A 7B 7C
    String 4: CNB1 0589110000242B20010020100
    String 5: HP_Mute_LED_0_0

Handle 0x000A, DMI type 12, 5 bytes
System Configuration Options
    Option 1: String1 for Type12 Equipment Manufacturer
    Option 2: String2 for Type12 Equipment Manufacturer
    Option 3: String3 for Type12 Equipment Manufacturer
    Option 4: String4 for Type12 Equipment Manufacturer

Handle 0x000B, DMI type 15, 29 bytes
System Event Log
    Area Length: 0 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 0x000C, DMI type 21, 7 bytes
Built-in Pointing Device
    Type: Touch Pad
    Interface: PS/2
    Buttons: 4

Handle 0x000D, DMI type 22, 26 bytes
Portable Battery
    Location: In the back
    Manufacturer: 13DP-SDI51
    Name: MU06055
    Chemistry: Lithium Ion
    Design Capacity: 5100 mWh
    Design Voltage: 10800 mV
    SBDS Version: 3.1
    Maximum Error: 1%
    SBDS Serial Number: 454C
    SBDS Manufacture Date: 2010-11-23
    OEM-specific Information: 0xFFFFFFFF

Handle 0x000E, DMI type 32, 20 bytes
System Boot Information
    Status: No errors detected

Handle 0x000F, DMI type 41, 11 bytes
Onboard Device
    Reference Designation: ATI Mobility Radeon HD 5650
    Type: Video
    Status: Enabled
    Type Instance: 1
    Bus Address: 0000:01:00.0

Handle 0x0010, DMI type 41, 11 bytes
Onboard Device
    Reference Designation: Intel(R) Centrino(R) Advanced-N 1000 AGN
    Type: Other
    Status: Enabled
    Type Instance: 1
    Bus Address: 0000:02:00.0

Handle 0x0011, DMI type 131, 64 bytes
OEM-specific Type
    Header and Data:
        83 40 11 00 37 00 00 00 00 00 32 D1 06 00 00 00
        F8 00 09 3B 00 00 00 00 01 20 00 00 01 00 06 00
        15 04 01 00 00 00 00 00 C8 00 FF FF 00 00 00 FF
        00 00 00 00 76 00 00 00 76 50 72 6F 00 00 00 00

Handle 0x0012, DMI type 4, 42 bytes
Processor Information
    Socket Designation: CPU
    Type: Central Processor
    Family: Core 2 Duo
    Manufacturer: Intel(R) Corporation
    ID: E5 06 01 00 FF FB EB BF
    Signature: Type 0, Family 6, Model 30, Stepping 5
    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) i7 CPU       Q 720  @ 1.60GHz
    Voltage: 1.2 V
    External Clock: 1066 MHz
    Max Speed: 1600 MHz
    Current Speed: 1600 MHz
    Status: Populated, Enabled
    Upgrade: ZIF Socket
    L1 Cache Handle: 0x0016
    L2 Cache Handle: 0x0015
    L3 Cache Handle: 0x0013
    Serial Number: Not Specified
    Asset Tag: FFFF
    Part Number: Not Specified
    Core Count: 4
    Core Enabled: 4
    Thread Count: 8
    Characteristics:
        64-bit capable

Handle 0x0013, DMI type 7, 19 bytes
Cache Information
    Socket Designation: L3 Cache
    Configuration: Enabled, Not Socketed, Level 3
    Operational Mode: Write Through
    Location: Internal
    Installed Size: 6144 kB
    Maximum Size: 6144 kB
    Supported SRAM Types:
        Synchronous
    Installed SRAM Type: Synchronous
    Speed: Unknown
    Error Correction Type: Single-bit ECC
    System Type: Unified
    Associativity: 12-way Set-associative

Handle 0x0014, 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:
        Synchronous
    Installed SRAM Type: Synchronous
    Speed: Unknown
    Error Correction Type: Single-bit ECC
    System Type: Data
    Associativity: 8-way Set-associative

Handle 0x0015, 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:
        Synchronous
    Installed SRAM Type: Synchronous
    Speed: Unknown
    Error Correction Type: Single-bit ECC
    System Type: Unified
    Associativity: 8-way Set-associative

Handle 0x0016, 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:
        Synchronous
    Installed SRAM Type: Synchronous
    Speed: Unknown
    Error Correction Type: Single-bit ECC
    System Type: Instruction
    Associativity: 4-way Set-associative

Handle 0x0017, 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 0x0018, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x0017
    Error Information Handle: 0x0019
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: SODIMM
    Set: None
    Locator: Bottom - Slot 1
    Bank Locator: BANK 0
    Type: DDR3
    Type Detail: Synchronous
    Speed: 1333 MHz
    Manufacturer: Nanya
    Serial Number: C575026F
    Asset Tag: Unknown
    Part Number: NT4GC64B8HB0NS-CG 
    Rank: 2

Handle 0x0019, 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 0x001A, DMI type 20, 19 bytes
Memory Device Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x000FFFFFFFF
    Range Size: 4 GB
    Physical Device Handle: 0x0018
    Memory Array Mapped Address Handle: 0x001F
    Partition Row Position: 2
    Interleave Position: 1
    Interleaved Data Depth: 1

Handle 0x001B, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x0017
    Error Information Handle: 0x001C
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: SODIMM
    Set: None
    Locator: Bottom - Slot 2
    Bank Locator: BANK 1
    Type: DDR3
    Type Detail: Synchronous
    Speed: 1333 MHz
    Manufacturer: Nanya
    Serial Number: BB85026F
    Asset Tag: Unknown
    Part Number: NT4GC64B8HB0NS-CG 
    Rank: 2

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 20, 19 bytes
Memory Device Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x000FFFFFFFF
    Range Size: 4 GB
    Physical Device Handle: 0x001B
    Memory Array Mapped Address Handle: 0x001F
    Partition Row Position: 2
    Interleave Position: 2
    Interleaved Data Depth: 1

Handle 0x001E, 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 0x001F, DMI type 19, 15 bytes
Memory Array Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x001FFFFFFFF
    Range Size: 8 GB
    Physical Array Handle: 0x0017
    Partition Width: 2

Handle 0x0020, DMI type 127, 4 bytes
End Of Table

biosdecode:

# biosdecode 2.12
ACPI 2.0 present.
    OEM Identifier: HPQOEM
    RSD Table 32-bit Address: 0xBBFFE0AC
    XSD Table 64-bit Address: 0x00000000BBFFE120
PNP BIOS 1.0 present.
    Event Notification: Not Supported
    Real Mode 16-bit Code Address: F000:B9BF
    Real Mode 16-bit Data Address: 0040:0000
    16-bit Protected Mode Code Address: 0x000FB9CA
    16-bit Protected Mode Data Address: 0x00000400
    OEM Device Identifier: SST2400
SMBIOS 2.6 present.
    Structure Table Length: 1675 bytes
    Structure Table Address: 0x000E94C0
    Number Of Structures: 33
    Maximum Structure Size: 174 bytes
PCI Interrupt Routing 1.0 present.
    Router ID: 00:1f.0
    Exclusive IRQs: None
    Compatible Router: 8086:122e
    Slot Entry 1: ID 01:00, on-board
    Slot Entry 2: ID 03:00, on-board
    Slot Entry 3: ID 0a:00, on-board
    Slot Entry 4: ID 0b:00, on-board
    Slot Entry 5: ID 00:01, on-board
    Slot Entry 6: ID 00:02, on-board
    Slot Entry 7: ID 00:03, on-board
    Slot Entry 8: ID 00:04, on-board
    Slot Entry 9: ID 00:05, on-board
    Slot Entry 10: ID 00:06, on-board
    Slot Entry 11: ID 00:1a, on-board
    Slot Entry 12: ID 00:1b, on-board
    Slot Entry 13: ID 00:1c, on-board
    Slot Entry 14: ID 00:1d, on-board
    Slot Entry 15: ID 00:1f, on-board
    Slot Entry 16: ID 02:00, on-board
    Slot Entry 17: ID 03:00, on-board
    Slot Entry 18: ID 04:00, on-board
    Slot Entry 19: ID 05:00, on-board
    Slot Entry 20: ID 06:00, on-board
    Slot Entry 21: ID 07:00, on-board
    Slot Entry 22: ID 08:00, on-board
    Slot Entry 23: ID 09:00, on-board
    Slot Entry 24: ID 00:00, on-board
    Slot Entry 25: ID 00:00, on-board
    Slot Entry 26: ID 00:00, on-board
    Slot Entry 27: ID 00:00, on-board
    Slot Entry 28: ID 00:00, on-board
    Slot Entry 29: ID 00:00, on-board
    Slot Entry 30: ID 00:00, on-board
    Slot Entry 31: ID 00:00, on-board
    Slot Entry 32: ID 00:00, on-board
    Slot Entry 33: ID 00:00, on-board
    Slot Entry 34: ID 00:00, on-board
    Slot Entry 35: ID 00:00, on-board
    Slot Entry 36: ID 00:00, on-board
    Slot Entry 37: ID 00:00, on-board
    Slot Entry 38: ID 00:00, on-board
share|improve this question
    
May be related to this bug? bugzilla.kernel.org/show_bug.cgi?id=60635 –  House Zet Feb 17 at 6:58
    
@ House Zet - only because "It's a bug in the Compatibility Support Module that emulates a BIOS environment. EFI boot makes it see all CPUs and boot." That is why I'm asking about coreboot and EFI. FYI, the link is a bug reported on Macbook Air, not a PC. –  decibel.places Feb 17 at 18:51
    
Another way I recover is to boot from the Ubuntu Boot Repair disk - even creating a pastebin file seems to fix the problem - here is the latest boot repair log - paste.ubuntu.com/6961780 –  decibel.places Feb 19 at 20:17
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