Suspend/resume broken on Lenovo laptops (Fedora 21 beta)

[Andrew Lutomirski]

On Mon, Nov 17, 2014 at 2:09 PM, valent.turkovic at gmail.com
<valent.turkovic at gmail.com> wrote:
> On Mon, Nov 17, 2014 at 1:04 AM, Andrew Lutomirski <luto at mit.edu> wrote:
>> On Sun, Nov 16, 2014 at 4:01 PM, valent.turkovic at gmail.com
>> <valent.turkovic at gmail.com> wrote:
>>> Just a quick update - i got suspend/resume to once randomly work in
>>> LXDE environment, but after that again everytime it failed.
>>>
>>> Then I tried using "debugging" kernel on GRUB menu, and now each time
>>> I tried suspend/resume in all environments (GNOME 3, LXDE, Cinnamon,
>>> XFCE) it worked every time as expected.
>>
>> This smells like a no_console_suspend and/or whatever the new drm or
>> i915 fast suspend/resume thing is.  Are there interesting boot
>> parameters that differ between working and non-working configurations?
>>
>> --Andy
>
> Andy do you have any ideas how to disable "i915 fast suspend/resume" ?

Try i915.fastboot=0, I think.  Although that seems to be the default,
so I may be off-base here.

You could also try intel_iommu=on and/or intel_iommu=off -- there are
historical issues there.

TBH, though, given the luks involvement, this could be some nasty
plymouth interaction.  Fiddling with quiet and rhgb could help.

Also, booting with no_console_suspend might give a better error message.

--Andy