Re: [gentoo-user] pm-suspend problem

[Mick]

On Wednesday 14 Oct 2015 18:09:04 Philip Webb wrote:

> -- script snipped --
>
> Thanks lots ! -- I looked up [1], which has useful extra advice.
>
> However, it occurs to me that my keyboard (Sanyo 1989) is PS/2 ,
> so the script will help only to enable restart via the mouse.
> There's a PS/2 setting on the mobo, which I've enabled,
> but might there also be something in the kernel which needs enabling ?

PS/2 should just work™.  It plugs straight into the MoBo chipset IRQs (via 
LAPIC these days) and does not rely on userspace applications.


> Lots of people seem to have problems with suspend/restart
> & it seems to be somewhat random & vary with different makes of mobo,
> so any further suggestions here may help others in future too.

Yes, I've had my fair share depending on MoBos, especially older builds.  I 
even had laptops with dodgy suspend to RAM performance:  it wouldn't suspend 
at all, or it would and then not wake up properly (screen wouldn't come on 
again).

In my experience suspend to RAM could break from one kernel to another on 
buggy MoBos, or between different video card kernel drivers (for radeon at 
least).

Note: some modern MoBos have S4 disabled at the BIOS by default, to make sure 
that USB ports continue to charge mobile phones and tablets.

-- 
Regards,
Mick