Installation from USB:
During acer boot keep pressing F2 - it will launch Boot Utility.
In [Main] tab select "F12 Boot Menu" to be [Enabled]. This allows us to select booting from USB device only for installation. By default it will always try to start from disk drive which is what we want.
In [Boot] menu choose "Boot Mode" to be [UEFI]. You can go with legacy but UEFI works just fine.
Plug in USB drive, Save Boot settings and reboot. Keep pressing F12 until you see "Boot Manager" menu.
Choose your USB drive (in my case it is USB HDD: General UDisk) and press Enter.
You will probably see something related to "security issue" with a blue menu and a hash tool utility.
From archlinux forum "You also need to enrol the hash of /arch/boot/...../vmlinuz" (
https://bbs.archlinux.org/viewtopic.php?id=166994)
After restart it will start with throwing a lot of exceptions:
"Jul 09 16:13:38 Wheatley kernel: nouveau E[ PFIFO][0000:01:00.0] SCHED_ERROR [ UNK06 ]"
This is not a stopping issue and we will fix that later.
For me first initialization just restarted laptop without a reason and returned back to boot menu but second time I saw prompt:
"root@archiso ~#" - success
(installation and configuration of Arch...)
When we exit chroot, unmount all partitions and restart laptop without USB stick we will get "security error" -> "linux boot manager has been blocked by the current security policy"
Working solution described here(
http://community.acer.com/t5/Legacy...r-has-been-blocked-by-the-current/td-p/268548) says:
Use F2 during boot to get into "Boot Menu". Set supervisor Password, this will allow us to change "Security Boot" in "Boot" Tab to [Disabled]. Now after restart we should see boot menu and then prompt.