It is my impression that specifying "mtrr_gran_size/mtrr_chunk_size" when "mtrr_cleanup: can not find optimal value" is still useful on some systems. The latest system where I helped identifying good values (according to https://github.com/tomreyn/linux_mtrr_size_fix) was a Gigabyte Z97X-Gaming 3, BIOS F7 09/18/2015 with Intel i5-4690K (incl. GPU) and some dedicated Nvidia graphics chipset running Linux version 5.4.0-40-generic (buildd@lcy01-amd64-011) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #44-Ubuntu SMP Tue Jun 23 00:01:04 UTC 2020 (Ubuntu 5.4.0-40.44-generic 5.4.44) and Nvidia proprietary driver 440.100: https://paste.ubuntu.com/p/VqnhtHmWd4/
Setting specific mtrr_gran_size/mtrr_chunk_size values actually helped the user get reliable graphics on Xorg on this Ubuntu 18.04 (+LTSE stack) system. So it does still seem relevant at times. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1163587 Title: mtrr_cleanup: can not find optimal value, perhaps no longer needed? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1163587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
