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Hi all,
I was trying to enable the overdrive functionality on my VEGA 64 so I added the following kernel parameter to GRUB:
/etc/default/grub:
GRUB_DEFAULT="Arch Linux Latest"
GRUB_TIMEOUT="5"
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="quiet amdgpu.ppfeaturemask=0xfffd7fff"
GRUB_CMDLINE_LINUX=""
Then I updated grub and rebooted the machine:
printf "0x%08x\n" $(cat /sys/module/amdgpu/parameters/ppfeaturemask)
Returns 0xfffd3fff.
Is the overdrive functionality on now?
Thanks,
B
Last edited by Bednar (2019-04-06 09:43:29)
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https://git.kernel.org/pub/scm/linux/ke … red.h#n129
0xFFFD3FFF & 0x4000 = 0
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I understand that means it isn't. Why is the ppfeaturemask not updated in accordance with the boot parameter set, though?
Thanks.
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Ok, I figured it out. It turns out modifying /etc/default/grub only applied to the linux-lts image. I had to add the kernel parameter manually during Boot to the latest kernel's image.
Thanks
Last edited by Bednar (2019-04-06 09:43:52)
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