the problem seems to me that memory allocation issue with higher resolution monitor.
When issue happening, the grub shell not able to read some files (depends on current memory usage). For instance, I create 20M, 30M, 40M, 50M ... 80M, 90M, 100M, 101M, 102M ... 110M, 120M, 130M, etc... files and try to read them in grub shell. The "ls -al" only list the part of files. sometimes: "20M, 30M, 40M, 50M ... 80M, 90M, 100M, 101M, 102M" sometimes: "20M, 30M, 40M, 50M ... 80M, 90M" sometimes: "20M, 30M, 40M, 50M ... 80M" when force "ls -al test-130M", it will show "out-of-memory" it looks to me that depends the current memory usage. Based on my test, this issue is likely relate to EFI or grub (or initramfs config) instead of kernel. For the people be blocked by this issue, the best practice should change the initramfs compression method to reduce the file size as what ybdjkfd shared in comment#41. ** Also affects: initramfs-tools (Ubuntu) Importance: Undecided Status: New ** Also affects: grub2-signed (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1842320 Title: Out of Memory on boot with 5.2.0 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1842320/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs