Dennis HilkLinux diagnosticsDE

Intel graphics

Intel Tiger Lake graphics

Tiger Lake appears in i915 and Xe tables; the runtime owner determines which initialization and hang interpretation applies.

Editorial source review: Share public profileOpen in the identification tool
On this page
  1. Overview & identity
  2. Driver & binding
  3. Firmware
  4. Read-only diagnostics
  5. Limitations & related issues
  6. References

Overview & identity

8086:9a49 is in the Tiger Lake family macros shared by the i915 and Xe PCI tables in the snapshot. That shared entry is evidence for candidate implementations, not evidence that both can own the same function simultaneously. The product or notebook label remains broader than an exact board identity.

Curated identifiers
pci 8086:9a49

A numeric match establishes a candidate family within the reviewed evidence. Marketing names, board variants, subsystem conditions and successful operation remain separate questions.

Driver & binding

Read the actual driver link before applying an i915-specific hang interpretation. Driver selection can depend on kernel build and probe policy even when both tables include the family. The i915 DMC filename below is a source-backed example for that implementation, not a command to make Xe request it.

  • i915 — kernel driver/module candidate
  • xe — kernel driver/module candidate

Detected, bound, operational: learn the difference

Firmware

Device/revision dependent

The listed DMC paths are explicitly constructed or declared in the reviewed i915 display source. DMC supports display power management; GuC/HuC images serve different graphics functions and have separate policy. Use the exact current kernel message and actual bound driver; the examples do not form a complete firmware manifest.

Checked examples or filename branches, not a complete installation list:

  • i915/tgl_dmc_ver2_12.bin

Inspect firmware packaging on your distribution

Read-only diagnostics

Run one displayed command at a time. Replace uppercase placeholders with the affected device, interface or module from your own output. Commands are never executed here. Read-only output can still contain private identifiers.

Identify this Intel graphics function

lspci -nnk -s BDF

Replace BDF with the display function address. This summary normally needs no sudo. Keep 8086:9a49 and the “Kernel driver in use” observation together; the candidate module list does not establish the selected driver.

Read the active graphics implementation

readlink /sys/bus/pci/devices/BDF/driver

BDF must include the full PCI domain. The read-only driver link normally requires no sudo. Its last component identifies the active implementation; no link is a binding observation, not proof that the platform is unsupported.

Associate DRM nodes with the PCI address

ls -l /sys/bus/pci/devices/BDF/drm

This read-only directory listing normally needs no sudo. Associate any card/render names with this function rather than assuming card0 is the desired GPU. A missing directory can follow disabled hardware, unbound graphics or failed probe; a listed render node does not prove an application uses acceleration.

Separate engine, display and firmware messages

journalctl -k -b --no-pager

Read the current boot and retain the first i915 or Xe error associated with this address. A GPU hang, DMC warning and EDID rejection describe different subsystems. Journal group permissions may restrict reading; a permissions error is not a GPU result.

Limitations & related issues

Table presence does not prove default binding, full feature parity or successful firmware loading for the running kernel. A renderer failure needs the userspace device selection and driver error, not only the broad Tiger Lake name.

These guides are linked for relevant observations, not as known defects of every device in this family.

Choose a hardware diagnostic workflow · Inspect a log excerpt in Fix Lab

References

Source review records a checked implementation or document, not a reproduced hardware test. Version-specific tables do not establish a minimum kernel or guaranteed operation.