No bootable device found After restart ( usually after using for few hours)

tharaka
tharaka Member Posts: 2 New User
edited October 2023 in 2020 Archives
hello , 
   my laptop is  Acer E5-573G-56RG . My os is Ubuntu . my os installed on samsung evo 850 SSD. Recently when I restart after using lap for like hour +  it says something like  "no bootable media found. press enter to choose boot device"  in next screen it shows my custom uefi boot entry   and shows  2 instances of my ssd. but choosing ether dosen't allow me to boot. if turned it off like 30 + mins  and start it work without any problems.  even when  it fails to boot,  when I boot lap with a live usb. I can see all the data in ssd . 
 
   I tried reinstalling os few times. changing secure boot mode.  resetting bios. but nothing work.    I'm guessing something wrong with my ssd but  checking ssd health doesn't return any errors either. like to know your opinion