The Short Story
Asus X205TA, 32bit grub, 64bit Ubuntu 15.04, kernel 4.0.5-generic
Problem: Partially installed grub-efi-amd64-signed causes error messages.
Question: What should be done about that?
The Long Story
I installed Ubuntu 14.10 on my X205TA following these instructions. However, I did leave Windows 8.1 intact and successfully set up dual-boot instead of deleting it.
After successfully installing Ubuntu I set up wifi and the SD-card reader following this Debian wiki page. In the process I installed the 4.0.5-generic kernel downloaded from the Ubuntu Kernel Team server.
Everything worked - except sound and bluetooth. Which is okay with me.
I then upgraded to Ubuntu 15.04 using
The update worked, but reported that it failed to install grub-efi-amd64-signed.
then resulted in a freeze at the Ubuntu loading screen. Ctr-Alt-F2 did not work. I pressed the power button to turn off the device and then immediately turned it on again. I selected the 3.19 kernel and Ubuntu booted. Booting after that worked with the 4.0.5 kernel as well.
sudo apt-get upgrade produces
Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... The following packages were automatically installed and are no longer required: gcc-4.9-base:i386 linux-headers-3.16.0-23 linux-headers-3.16.0-23-generic linux-image-3.16.0-23-generic linux-image-extra-3.16.0-23-generic linux-signed-image-3.16.0-23-generic Use 'apt-get autoremove' to remove them. Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] y Setting up grub-efi-amd64-signed (1.46.1+2.02~beta2-22ubuntu1.1) ... grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory. dpkg: error processing package grub-efi-amd64-signed (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: grub-efi-amd64-signed E: Sub-process /usr/bin/dpkg returned an error code (1)
Apart from this error message nothing has changed after the upgrade, except that my brightness setting is now remembered after reboots and that suspend does not work any more.
The question is:
What should I do about this error? Can it safely be ignored (32bit grub works just fine)? Or should I remove grub-efi-amd64-signed? Re-install it? And why do I even have it installed - the X205TA only supports 32bit EFI after all.