Shutdown, restart and suspend problems on Acer E5 511 (Sandy Bridge) 14.04 and 15.04

Lot's of similar problems out there. Basically I have tried most or all of the suggestions offed but to no avail.

Specifically. I installed Unity 15.04 on two Acer E5 511 C1WE laptops and it seems to work great in UEFI with secure boot turned off, a bit shaky in legacy, seems more flickery and unstable in boot up, but it still works fine, both modes on both laptops suffer from the same problem as follows:

Shutdown, restart and suspend all require me to hard restart, screen goes dark and I get this message:

[ OK ] Started Light Display Manager.
[ OK ] Started ACPI event daemon. Starting ACPI event daemon... Starting Network Manager Script Dispatcher Service....
[ OK ] Started Network Manager Script Dispatcher Service.

system then tries to reboot and hangs. I hard Shutdown with the button.When I restart typically it will hang again, sometimes even twice before I get a clean boot. I get GRUB options and sometimes not?

I have two identical laptops here and I am getting consistent results from both so I can count out it just being this unit.

Anyway I would be happy to provide more info. I am quietly hopping that this will get sorted soon in an update, as it seems to be a broad sweeping issue. But as a recent convert to Ubuntu I can't assume that?

Thanks!

1 Answer

I can offer no guarantees on this, but you might look into the reboot= kernel option. As documented in the kernel source tree's Documentation/kernel-parameters.txt file:

reboot= [KNL] Format (x86 or x86_64): [w[arm] | c[old] | h[ard] | s[oft] | g[pio]] \ [[,]s[mp]#### \ [[,]b[ios] | a[cpi] | k[bd] | t[riple] | e[fi] | p[ci]] \ [[,]f[orce] Where reboot_mode is one of warm (soft) or cold (hard) or gpio, reboot_type is one of bios, acpi, kbd, triple, efi, or pci, reboot_force is either force or not specified, reboot_cpu is s[mp]#### with #### being the processor to be used for rebooting.

To use these options, you'll need to edit your GRUB (or other boot loader) configuration. You can do this on a one-time basis in GRUB by hitting e rather than Enter to launch your kernel. This will give you a simple text editor in which you can change the kernel options. If you find something that works, use GRUB Customizer to set it up permanently.

If you use something other than GRUB, you'll need to consult the program's documentation to learn how to make changes. (Most make it easier than GRUB to customize settings, at least if you're comfortable editing configuration files.)