Hi everyone,

I’m having an issue with the option “Ignore vendor programmed fuses that limit max. DRAM frequency”. When I enable said option my laptop will turn on but the screen stays black and “nothing” happens. The only option to recover the laptop is to install a 1600MHz stick, that will limit the other 2133MHz stick to 1600MHz and to reflash a coreboot build with above mentioned option turned off.

My laptop is a Lenovo Thinkpad T430 without a dGPU (i.e. only Intel HD4000 iGPU). As far as I can recall the memory worked at its maximum frequency (2133MHz) fine when using the Lenovo OEM BIOS.

I’m using coreboot v4.12 with SeaBIOS v1.13.0 and use libgfxinit. I also tried using the VGA option ROM but to no avail.

I've appended the output of dmidecode -t memory and dmidecode -t processor and uname -r below.

Does anyone else has this issue?

How do I debug this issue?

Evgeny Zinoviev pointed me some time ago to the optional use of the mrc.bin for the X220 [1] and someone trying to use the mrc.bin for the T430 [2]. Could I somehow use the mrc.bin approach for the X220 in [2] in conjunction with [1] and [3] to allow the optional use of the mrc.bin for the T430?

Kind regards

lhochstetter

[1] https://review.coreboot.org/c/coreboot/+/37153
[2] https://review.coreboot.org/c/coreboot/+/23489
[3] https://review.coreboot.org/c/coreboot/+/32500

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uname -r:

4.19.0-11-amd64 (Debian 4.19.146-1)

Here is the output of dmidecode -t memory and dmidecode -t processor:

# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.

Handle 0x000A, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0000
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: SODIMM
        Set: None
        Locator: Channel-0-DIMM-0
        Bank Locator: BANK 0
        Type: DDR3
        Type Detail: Synchronous
        Speed: 800 MT/s
        Manufacturer: Kingston
        Serial Number: 4a2d6e3a
        Asset Tag: Not Specified
        Part Number: KHX2133C11S3L/8G
        Rank: 2
        Configured Memory Speed: 800 MT/s
        Minimum Voltage: Unknown
        Maximum Voltage: Unknown
        Configured Voltage: Unknown

Handle 0x000B, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0000
        Error Information Handle: Not Provided
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8192 MB
        Form Factor: SODIMM
        Set: None
        Locator: Channel-1-DIMM-0
        Bank Locator: BANK 0
        Type: DDR3
        Type Detail: Synchronous
        Speed: 800 MT/s
        Manufacturer: Kingston
        Serial Number: 4b2d703a
        Asset Tag: Not Specified
        Part Number: KHX2133C11S3L/8G
        Rank: 2
        Configured Memory Speed: 800 MT/s
        Minimum Voltage: Unknown
        Maximum Voltage: Unknown
        Configured Voltage: Unknown

Handle 0x0004, DMI type 4, 42 bytes
Processor Information
        Socket Designation: Not Specified
        Type: Central Processor
        Family: Pentium Pro
        Manufacturer: GenuineIntel
        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) i7-3840QM CPU @ 2.80GHz
        Voltage: Unknown
        External Clock: Unknown
        Max Speed: Unknown
        Current Speed: Unknown
        Status: Unpopulated
        Upgrade: Unknown
        L1 Cache Handle: 0x0006
        L2 Cache Handle: 0x0007
        L3 Cache Handle: 0x0008
        Serial Number: Not Specified
        Asset Tag: Not Specified
        Part Number: Not Specified
        Core Count: 4
        Core Enabled: 4
        Characteristics: None