#1 2015-10-19 23:06:32

plasmasnomen

Member

Registered: 2015-10-19

Posts: 5

Lenovo E540 will not wake from sleep - Hydrogen

I have a Lenovo E540 and every time the device goes to sleep, it will not wake up. Regardless of any input or combination thereof, the sleep indicator light continues to "snooze".

I was also curious as to whether or not it was linked to an error message I've been receiving upon boot.

thinkpad_acpi unsupported brightness interface

When I had Jessie installed on the device, disabling USB3 support in the bios solved my sleep issue. With Hydrogen, it didn't help.

I can post the results of any commands if needed.

tknomanzr

BL Die Hard

From: Around the Bend

Registered: 2015-09-29

Posts: 1,057

Re: Lenovo E540 will not wake from sleep - Hydrogen

Please post the output of:

lspci | grep VGA

You have a backlight issue going on, it seems.

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plasmasnomen

Member

Registered: 2015-10-19

Posts: 5

Re: Lenovo E540 will not wake from sleep - Hydrogen

I did notice a difference between having USB3 support enabled in the bios. With it enabled, I get no back light, and the sleep indicator fades slowly from on to off upon attempted wake. With USB3 support disabled, when I attempt to wake the computer the indicator flashes on and off repeatedly and the back light turns on but all I get is a black screen. Anyway, here's the requested output:

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)

tknomanzr

BL Die Hard

From: Around the Bend

Registered: 2015-09-29

Posts: 1,057

Re: Lenovo E540 will not wake from sleep - Hydrogen

I would check systemctl to see if more than one backlight entry exists. If so, then mask the one that is currently running and then enable the one that is not and see if that fixes it. I haven't run into this with intel gpu's yet but I know ATI gpu's often need this treatment.
So the commands would look roughly like this:

sudo systemctl mask someBacklight.service
sudo systemctl enable theOtherBacklight.service

Another thing to try is to see if your backlight keys on your keyboard work and turn the brightness back up (mine usually don't work).

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plasmasnomen

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Registered: 2015-10-19

Posts: 5

Re: Lenovo E540 will not wake from sleep - Hydrogen

This is all gibberish to me, but if it helps, my backlight keys worked out of the box. If I boot with an external monitor plugged in, at the login screen they don't work, the laptop screen is dark, and I have to hit super+P to be able to see my login prompt on the external monitor. Once I get to my desktop, the keys will work again.

systemctl | grep backlight
sys-devices-pci0000:00-0000:00:02.0-drm-card0-card0\x2deDP\x2d1-intel_backlight.device              loaded active plugged   /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight
systemd-backlight@backlight:intel_backlight.service                                                 loaded active exited    Load/Save Screen Backlight Brightness of backlight:intel_backlight
system-systemd\x2dbacklight.slice                                                                   loaded active active    system-systemd\x2dbacklight.slice

the full systemctl log can be found here ( http://cjriccitelli.com/files/systemctl.log.html )

redcollective

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From: The Wilds

Registered: 2015-09-29

Posts: 111

Re: Lenovo E540 will not wake from sleep - Hydrogen

Known issue:

https://forums.lenovo.com/t5/ThinkPad-1 … -p/1868488

Does this look like a match?

bios update release noted on page 5 of that thread.

red

Last edited by redcollective (2015-10-20 16:30:24)

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plasmasnomen

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Registered: 2015-10-19

Posts: 5

Re: Lenovo E540 will not wake from sleep - Hydrogen

Updating my bios did not solve the problem. My computer goes to sleep, and the light snoozes. Upon attempted wake, the light blinks on and off steadily and eventually goes solid again. However, all I get is a black (backlit) screen.

Head_on_a_Stick

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From: London

Registered: 2015-09-29

Posts: 9,084

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Re: Lenovo E540 will not wake from sleep - Hydrogen

Did you try disabling USB3 from your firmware (BIOS) options?
https://bugs.launchpad.net/ubuntu/+sour … ug/1340376

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plasmasnomen

Member

Registered: 2015-10-19

Posts: 5

Re: Lenovo E540 will not wake from sleep - Hydrogen

As mentioned earlier in the thread, disabling USB3 support did not solve the sleep issue. I did try that workaround again after updating the bios, but no dice.