I installed ubuntu 16.04 LTS a week after official release using the mini ISO, then ubuntu-desktop without recommended packages. Since then, just installing packages on a need to basis.
After trying to wake the computer from sleep by using the touchpad, the light on the power button stops blinking and I hear the sound of the hard drive coming online. But :
- the screen stays completely off, no backlight.
- the laptop doesn't respond to any keyboard presses.
- Everytime I use The magic SysRq to restart the laptop. Long pressing the power button works too.
This problem wasn't present when using ubuntu 14.04 LTS
The proposed solutions in all the possible duplicates on this website didn't solve my problem. One big difference is that my laptop screen is off not just blank.
Possible helpful informations. All got after system reboot.
HARDWARE DETAILS :
Computer Model :
Hewlett-Packard Compaq Presario C700 Notebook PC/30D9, BIOS F.35 03/29/2010
uname -a
Linux CPC700 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
lspci -nn :
00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 03)
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03)
00:02.1 Display controller [0380]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (secondary) [8086:2a03] (rev 03)
sudo lshw -class display
*-display:0
description: VGA compatible controller
product: Mobile GM965/GL960 Integrated Graphics Controller (primary)
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:26 memory:91000000-910fffff memory:80000000-8fffffff ioport:30d0(size=8)
*-display:1 UNCLAIMED
description: Display controller
product: Mobile GM965/GL960 Integrated Graphics Controller (secondary)
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: latency=0
resources: memory:91100000-911fffff
EDIT 1
I think this is a bug, because it doesn't happen all the time anymore. I would file it as such on launchpad but I don't know which packages cause the problem. How can I go on to find them in my specific case ?
EDIT 2
With the setting "When the lid is closed : do nothing".
- The system doesn't go to sleep when I close the lid.
- Content of listens (acpi_listen > ~/listens) :
button/lid LID close
button/lid LID open
Best Answer
After confirming in the comments that the
pm-suspend
command works properly with your laptop, we can now tell it to use that command exclusively to suspend it.Open a terminal and type in
gksudo gedit /etc/default/acpi-support
Enter your admin password when prompted.
Look for the line that says
SUSPEND_METHODS="dbus-pm dbus-hal pm-utils"
Change the line to read
SUSPEND_METHODS="pm-utils"
Save and close the editor, and then reboot your laptop.
Create suspend scripts:
In terminal, type in
sudo nano /etc/acpi/events/laptop-lid-close
Paste this into the script (right-click terminal window and click "Paste"):
To save the file in
nano
, press CTRL+O then ENTER. (That is the letter O, not zero.) Then press CTRL+X to exit.Make the file executable with
sudo chmod +x /etc/acpi/events/laptop-lid-close
Now make the next script that will be executed by the one you just made. In terminal, type
sudo nano /etc/acpi/lidclose.sh
Paste this into the file:
Save and close with CTRL+O, ENTER, CTRL+X. Make it executable with
sudo chmod +x /etc/acpi/lidclose.sh
Now restart
acpid
withsudo service acpid restart
.Now try closing the lid, wait a few seconds and reopen it. If it doesn't suspend, reboot your computer and try it again.