If you are searching for this string because of a system error, it is likely related to one of two scenarios:
A. ACPI Driver Errors If you see a "Device Instance ID" similar to this in a Blue Screen of Death (BSOD) dump or an error log, it suggests the OS is having trouble communicating with the CPU's power features.
B. "GenuineIntel" vs. "GenuineI64" Confusion
In some rare Windows 10/11 upgrade scenarios, systems with this older Family 6 Model 58 architecture may fail updates if specific power management drivers are not present. The OS checks for GenuineIntel to validate that the CPU supports required instruction sets (like SSE4.1/4.2, which Ivy Bridge supports). acpi genuineintel---intel64-family-6-model-58
As of kernel 6.x, Ivy Bridge (model 58) is considered legacy but still supported:
If you see the malformed string on a modern kernel, it is harmless if no functional issues exist. If you’re maintaining a distribution or embedded system based on Ivy Bridge, you can safely ignore cosmetic printk anomalies. If you are searching for this string because
For Linux, you can often ignore cosmetic malformations. If performance is impacted (e.g., only one C-state available), try:
acpi genuineintel---intel64-family-6-model-58 If you see the malformed string on a
When an ACPI-compliant OS (like Linux, Windows, or BSD) parses the DSDT/SSDT tables, it reads the _HID (Hardware ID) or _CID (Compatible ID) for the CPU device. The string ACPI0007 is standard, but OEM firmware sometimes uses raw vendor strings.
model 58 : The processor model number (0x3A).