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====== Ubuntu - GPU - AMD GPU - Overclocking - Boot parameter ======

It is required to unlock access to adjust clocks and voltages in sysfs by appending the Kernel parameter **amdgpu.ppfeaturemask=0xffffffff**.

<WRAP info>
**NOTE:**  Not all bits are defined, and new features may be added over time.

  * Setting all 32 bits may enable unstable features that cause problems such as screen flicker or broken resume from suspend.
  * It should be sufficient to set the **PP_OVERDRIVE_MASK bit, 0x4000**, in combination with the default **ppfeaturemask**.

To compute a reasonable parameter for your system, execute:

<code bash>
printf 'amdgpu.ppfeaturemask=0x%x\n' "$(($(cat /sys/module/amdgpu/parameters/ppfeaturemask) | 0x4000))"
</code>

returns:

<code bash>
amdgpu.ppfeaturemask=0xfff7ffff
</code>

</WRAP>