suspend/resume on Lenovo X1 (regression from reports on wiki)

[Glen Barber]

On Thu, Aug 29, 2013 at 06:42:28PM +0200, Laura Marie Feeney wrote:
> No xorg.conf is needed and all acpi options are as default.  It
> seems to work correctly both with and without acpi_video and
> acpi_ibm in the kernel.  It's still necessary to compile  out
> 'options VESA' from the kernel, otherwise resume fails entirely.
> 

I can also confirm that removing VESA from the kernel allows my system
to resume properly, both with Xorg and console.

root at nucleus:~ # kldstat 
Id Refs Address            Size     Name
 1   28 0xffffffff80200000 eb6148   kernel
 2    1 0xffffffff810b7000 22ca40   zfs.ko
 3    2 0xffffffff812e4000 5e58     opensolaris.ko
 4    1 0xffffffff81412000 6149f    i915kms.ko
 5    1 0xffffffff81474000 3e5c7    drm2.ko

> I also observe the issue that Gleb Smirnoff mentions below, that the
> xorg server is quite slow after result.  Using 'xterm -sb' and
> moving the scrollbar up and down very fast, I was able to able to
> get the xorg process up to ~20% of CPU.  On casual observation, it
> didn't seem to get worse after several suspend/resume cycles.
> 

I did not see any unusual CPU chewing by X after resume in my case.
I did see something unpleasant with xrandr(1), however.  I have dual
external monitors attached, which I have a login script set the
resolution properly.  With my resolution set to 3840x1080, X is unusable
on resume.  (The screen is fuzzy, but the machine does not crash.)
Without changing the resolution before suspend, X works properly at
resume.

Glen

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