Hello! Recently upgraded to Kubuntu 18.04 on my ASUS desktop, and I'll say this upfront: I've never been happier to run a flavor of Ubuntu on it. Everything just worked out of the box, I only spent extra time setting up and installing my favorite open-source art programs, (All of which run faster than they do on Windows!) and my AMD APU's open-source driver now seems to perform 98% on par with its propriety Windows counterpart. If it weren't for one program I still need crashing on Wine, this would have been the year I ditched Windows on my main PC.
Only one thing really went wrong during the (very fast) installation process via a live USB made with Rufus. I don't think GRUB detected my Windows install correctly, while installing and configuring itself during the installation. Any attempts to boot to Windows 8.1 result in a black screen. (At least my monitor doesn't go to sleep for the lack of a signal, so this isn't too disastrous, right? ) I tried adding a custom boot entry in GRUB to see if I could fix this myself, but all I get is a short error message that kicks me back to GRUB.
I haven't seriously dove deep into GRUB's functionality since I needed to disable IRQ polling in Hardy Heron, to work around an APM power management bug that sent too little power to my Ethernet card, so in short, I'm a little stumped. (Hard to believe 8.04 wasn't yesterday!) Because of that, I have so little idea of what I'm doing, I don't even know what I should be looking up to help myself.
How I did the installation:
From what I have researched, it seems like installing Ubuntu alongside Windows 8.1 or Windows 10 only works flawlessly the first time around; performing a clean reinstall of a newer version of Ubuntu, in order to upgrade, sometimes results in a broken Windows boot entry. So, I'm not entirely alone on this one, but I suspect this is an edge case regardless.-Pointed the Kubuntu installer to my EFI partition on /sda2
-Wiped the ext4 partition I had Ubuntu 14.04 installed onto, and used that as the partition for the new OS
-Deleted the old swap partition and made a new one, just to be on the safe side
-Nervously triple checked the mount points of each partition relevant to installing Kubuntu
-Did not touch, format, or shrink the Windows partition
-Did not make a /usr partition separate from the OS's main partition
-Left SecureBoot alone and did not disable it, since I didn't need to disable it last time
-All boot entries on the GRUB menu look the same as before; even the working Kubuntu entry still says Ubuntu
Note: I don't know if it makes any real difference, but my 14.04 install was originally vanilla Ubuntu, then I installed KDE at a later point. This time, I installed a live USB of Kubuntu 18.04 instead
Is there a way to fix my boot entry for Windows without letting the Boot Repair tool completely reinstall GRUB? I'm greatly concerned that would be overkill, if not run the risk of also breaking my Kubuntu boot entry.
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