SOLVED: Ubuntu 16.04 LTS cannot shut down

M. Fioretti mfioretti at
Fri Jul 1 16:14:06 UTC 2016

On 2016-06-30 18:14, M. Fioretti wrote:
> Greetings,
> the title says it all. I installed this version of Ubuntu on an HP 
> Pavilion G6
> laptop, and the only thing that doesn't work, and makes Ubuntu unusable 
> for now,
>  is the fact that it does NOT shut down.

Thanks a THOUSAND to all who answered, especially (IIRC) Colin, who 
first thought it may be an issue. After that, I hunted down the messages about radeon errors, 
and now
the laptop shuts down, logs out and reboots properly. The corresponding 
grub configuration,
with the radeon parameters, included, is below.

Right now (finger crossed!!!) this doesn't seem to have caused graphic 
degradation, or any other problem. Wish me good luck.

Last but not least, many more thanks in advance to whoever will be so 
kind to

1) explain what the heck the several parameters I added mean.
    I know enough Linux, hardware and C to discover and test stuff like 
    myself, when properly directed and time permits it, but I'm not so up 
to date,
    honestly, to understand all that is happening here

2) tell me if/how the grub changes below could be optimized. Is there 
any of those
    extra parameters that in your opinion I should remove because it's 
    or set differently, etc.. I can't promise I'll try and report it 
soon, because
    now I can finally give up sleep to prepare on that laptop the 
business trip
    I have starting next Sunday :-) But I'll write down everything.

Thanks again, and here is the grub file,


[marco]$ cat grub.radeon.1
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.modeset=1 radeon.drm=1 
radeon.runpm=0 acpi=force"
GRUB_CMDLINE_LINUX="bluetooth.blacklist=yes xhci_hcd.blacklist=yes"

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that 
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)

# Uncomment to disable graphical terminal (grub-pc only)

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via 
# you can see them in real GRUB with the command `vbeinfo'

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to 

# Uncomment to disable generation of recovery mode menu entries

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"


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