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
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 : Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 03) 00:02.0 VGA compatible controller : Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) 00:02.1 Display controller : 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
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 ?
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