I have used following command to program my Acer C720: ./flashrom -p internal:ich_spi_forces=yes -V -N --ifd -i bios -w peppy/coreboot-peppy-seabios-latest.ro m > ferr.txt 2>&1
The eprom chip in this computer is: 25Q64FVSIG and yes I have remover write protection screw. I have received following response from this flashrom command:---------flashrom v1.0 on Linux 4.9.0-8-amd64 (x86_64)flashrom is free software, get the source code at https://flashrom.org flashrom was built with libpci 3.5.2, GCC 6.3.0 20170516, little endianCommand line (9 args): ./flashrom -p internal:ich_spi_forces=yes -V -N --ifd -i bios -w peppy/coreboot-peppy-seabios-latest.romUsing clock_gettime for delay loops (clk_id: 1, resolution: 1ns).Initializing internal programmerFound candidate at: 00000500-00000510Found coreboot table at 0x00000500.Found candidate at: 00000000-00000194Found coreboot table at 0x00000000.coreboot table found at 0x7becf000.coreboot header(24) checksum: 72d0 table(404) checksum: f9e3 entries: 10Vendor ID: GOOGLE, part ID: PeppyUsing Internal DMI decoder.DMI string chassis-type: "Desktop"DMI string system-manufacturer: "GOOGLE"DMI string system-product-name: "Peppy"DMI string system-version: "1.0"DMI string baseboard-manufacturer: "GOOGLE"DMI string baseboard-product-name: "Peppy"DMI string baseboard-version: "1.0"Found chipset "Intel Lynx Point LP Mainstream" with PCI ID 8086:9c45.This chipset is marked as untested. If you are using an up-to-date versionof flashrom *and* were (not) able to successfully update your firmware with it,then please email a report to flashrom@flashrom.org including a verbose (-V) log.Thank you!Enabling flash write... Root Complex Register Block address = 0xfed1c000Error accessing ICH RCRB, 0x4000 bytes at 0x00000000fed1c000/dev/mem mmap failed: Operation not permittedFAILED!FATAL ERROR!Unhandled programmer parameters (possibly due to another failure): ich_spi_forces=yesError: Programmer initialization failed.-------- Also please find attached output of dmidecoed from this C720 computer: I will appreciate any suggestion.
# dmidecode 3.0 Getting SMBIOS data from sysfs. SMBIOS 2.7 present. 10 structures occupying 369 bytes. Table at 0x7BFD7020. Handle 0x0000, DMI type 0, 24 bytes BIOS Information Vendor: coreboot Version: 4.0-6588-g4acd8ea-dirty Release Date: 09/04/2014 ROM Size: 8192 kB Characteristics: PCI is supported PC Card (PCMCIA) is supported BIOS is upgradeable Selectable boot is supported ACPI is supported Targeted content distribution is supported BIOS Revision: 4.0 Firmware Revision: 0.0 Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: GOOGLE Product Name: Peppy Version: 1.0 Serial Number: 123456789 UUID: Not Settable Wake-up Type: Reserved SKU Number: Not Specified Family: Not Specified Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: GOOGLE Product Name: Peppy Version: 1.0 Serial Number: 123456789 Handle 0x0003, DMI type 3, 21 bytes Chassis Information Manufacturer: GOOGLE Type: Desktop Lock: Not Present Version: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Boot-up State: Safe Power Supply State: Safe Thermal State: Safe Security Status: None OEM Information: 0x00000000 Height: Unspecified Number Of Power Cords: Unspecified Contained Elements: 0 Handle 0x0004, DMI type 4, 42 bytes Processor Information Socket Designation: Not Specified Type: Central Processor Family: Pentium Pro Manufacturer: GenuineIntel ID: 51 06 04 00 FF FB EB BF Signature: Type 0, Family 6, Model 69, Stepping 1 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) Celeron(R) 2955U @ 1.40GHz Voltage: Unknown External Clock: Unknown Max Speed: Unknown Current Speed: Unknown Status: Unpopulated Upgrade: Other L1 Cache Handle: Not Provided L2 Cache Handle: Not Provided L3 Cache Handle: Not Provided Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Core Count: 16 Characteristics: None Handle 0x0005, DMI type 32, 11 bytes System Boot Information Status: No errors detected Handle 0x0006, DMI type 41, 11 bytes Onboard Device Reference Designation: lightsensor Type: Other Status: Enabled Type Instance: 51 Bus Address: 0002:44:00.0 Handle 0x0007, DMI type 41, 11 bytes Onboard Device Reference Designation: trackpad Type: Other Status: Enabled Type Instance: 37 Bus Address: 0001:67:00.0 Handle 0x0008, DMI type 41, 11 bytes Onboard Device Reference Designation: touchscreen Type: Other Status: Enabled Type Instance: 38 Bus Address: 0002:4a:00.0 Handle 0x0009, DMI type 127, 4 bytes End Of Table
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