Download linux-image-unsigned-6.8.0-1001-oem_6.8.0-1001.1+psr2_amd64.deb and linux-modules-6.8.0-1001-oem_6.8.0-1001.1+psr2_amd64.deb to a local folder (like /tmp/test), then $cd /tmp/test; $sudo dpkg -i *.deb, reboot the sytem, in the grub, select linux-6.8.0-1001 to boot up (don't forget remove i915.enable_psr=0)
Download linux-image- unsigned- 6.8.0-1001- oem_6.8. 0-1001. 1+psr2_ amd64.deb and linux-modules- 6.8.0-1001- oem_6.8. 0-1001. 1+psr2_ amd64.deb to a local folder (like /tmp/test), then $cd /tmp/test; $sudo dpkg -i *.deb, reboot the sytem, in the grub, select linux-6.8.0-1001 to boot up (don't forget remove i915.enable_psr=0)