Not only GPUs, but also WiFi cards. Got 8265 on Thinkpad T480 and 5G speeds are awful. When you're trying to download via 5G network something big - connection interrupts and won't come back until NetworkManager is restarted, also there are plenty of errors in dmesg. All fine on 5.0.x and LTS kernel (4.19.x), only 5.1.x are affected.
Check youor mesages and look for EDC asset. There is a fix teed up which may help your case. I have seen this "EDC assert" issue with 8265 [1] and the fix is given in comment #42. I have tested it on kernel 5.2-rc7 and works fine. This impacts all pre-9000 intel wifi cards. This will NOT make it into 5.2, as Emmanual G points out, as its late in the cycle; presumably will be in 5.2.1 and 5.3. A work around you might try is to add this iwlwifi option - then reboot. # cat >> /etc/modprobe.d/iwlwifi.conf options iwlwifi swcrypto=1 regards, gene [1] https://bugzilla.kernel.org/show_bug.cgi?id=203315