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Old 10-27-2017, 02:54 PM   #1
kontrabarta
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Registered: Oct 2017
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GRUB doesn't start after Dualboot Debian installation alongside Win10 - all attempts to fix failed


Hey everyone,
I already installed some Linux/Win Dualboot systems sucessfully in the past, but with this one I'm stuck.

On the hdd Windows 10 was already installed. I shrinked the partition with the standard win-tool and installed Debian Minimal. Afterwards the installed debian didn't start, no GRUB appeared. Just Win started as usual. So I can't access Debian.

I tried quite a lot to fix it:

As the pc works with UEFI, I first tried to change the UEFI boot order, but there is no Debian entry. As well I tried to disable secure boot, but it seems not yet to be implemented on the Lenovo Thinkcenter M81, so there is no such option to disable in the UEFI.

Second I booted the Debian Minimal cd in its rescue mode and let it reinstall GRUB in two diffrent modes. Nothing changed.
Back in Windows I installed EasyUEFI, a programm that lets you see and manipulate the boot order/entries of the UEFI. Debian appeared, but a change of the boot order didn't bring a change either.

Finally I started the live cd of BootRepair, a programm that tries to fix GRUB automatically. It told me to enter some CHROOT lines into the terminal but afterwards complained: "GRUB is still present. Please try again." So as this didn't work, I used the other option of the programm and let it collect some information on the partitions for me. You can find it under paste.ubuntu.com/25828935.

Can you help me please? Although usually I manage dualboot installations, I'm not really into Linux and if you write me e.g. some terminal stuff, I'd be glad if it's understandable for a beginner like me... ;-) THANK YOU!
 
Old 10-30-2017, 09:10 AM   #2
colorpurple21859
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Registered: Jan 2008
Location: florida panhandle
Distribution: slackware64-current, fedora,Xubuntu, others
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what directories and files are on the efi partition?
 
  


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