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#1 2012-04-07 01:22:16

taesoo
Member
Registered: 2012-04-07
Posts: 4

W520: problem of resume from S3

Hi fork,

background: W520, two ssd (one bay replacing optical), 16G + 4G = 20G, VT enabled, +nox2apic, no de, xmonad/laptop-mode/smapi/thinckpad_acpi

Shortly, it often fails to resume from sleep, flashing lights and stuck in infinite loop.
(like this one: http://www.youtube.com/watch?v=48Mi4tqUaZc)

- don't get any suspicious hash of device drivers with pm_trace enabled kernel (suspend works fine always)
- 8/10 happens when I put it into sleeve (interesting)
- testing with graphic cards:
   discrete, integrated: nvidia/intel/nouveou are same
   bumblee+nouveou/nvidia: less likely happens (1/10), but happens
   * bumblee works out of box, but I'd like to use single X:0, instead of separete X:8.
   * xrandr doesn't support multiple gpu to bind single X:0
   * xinerama work! but not support on-the-fly detection, which is not an option.

I am comfortable with dealing with kernel sources, or doing some reverse-engineering, but I can't find more clues to make it work .. is there anybody uses W520?

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#2 2012-04-07 01:34:33

taesoo
Member
Registered: 2012-04-07
Posts: 4

Re: W520: problem of resume from S3

One might be interested in bumblebee experiments:
- bumblebee/nouveau performs 1/3 fps compared to bumblebee/nvidia
- bumblebee/nvidia gives >1h extra battery life
- integrated (i915) only option gives ~10h battery life

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