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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1949029

Title:
  SSD disappears on Reboot but on cold boot is detected

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I have a dual boot system (Windows 10 and Ubuntu 21)
  Lenovo Z50-70

  I upgraded my storage to Samsung 870 QVO 1TB.

  When I reboot the machine via Windows, the machine reboots normally
  and SSD is detected. However, when I reboot the machine via Ubuntu,
  the machine will reboot but it won't detect my SSD.

  I have upgraded to the latest Ubuntu distro and have the latest
  kernels, etc... I have validated that my installation and boot
  partitions are correct.

  Other people who faced an issue similar to mine were using SSDs with
  NVME. However, my SSD is SATA based, not NVME so neither applying the
  fix I found about setting nvme latency nor upgrading distro have
  solved the problem.

  On Windows, I had initially the same problem but on Windows after
  selecting AHCI Standard SATA mode, the issue was solved. On Ubuntu,
  I'm already in AHCI mode but the problem persists. I did few times
  grub boot repair to validate if it was something messed up with my
  boot configurations but turned out that it's not.

  I'm able to use Ubuntu 21 at the moment. However, I'm unable to
  perform a reboot. Every time I have to shut down the machine and then
  manually push the laptop's button to launch it again because if I
  accidentally hit reboot via Ubuntu, the machine will not find SSD and
  on next boot, the BIOS falls back into Windows Boot Manager and I have
  to run grub boot repair all over again via live USB.

  I hope that you will find a solution for this problem soon.

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