https://bugzilla.kernel.org/show_bug.cgi?id=48101





--- Comment #28 from fpgahardwareengineer <mypersonalmailb...@mail.com>  
2013-01-01 10:02:57 ---
(In reply to comment #26)

Hi Greg,

> As Alan has pointed out, if you are relying on a distro to provide your kernel
> for you, please contact them, they are really the only ones that can help you
> out, we can't do anything with their older kernel releases.
> 
> We can only help you if you are using the latest kernel.org releases, or the
> -stable kernel releases from kernel.org.
> 
> As for "USB Legacy mode", why are you using that?  I wouldn't recommend using
> it as many BIOSes can not handle this properly with suspend/resume as you have
> noticed.  Does everything work properly if you disable that option?


I know you are a "big dog" regarding the development of Linux kernel, but as an
avid amateur Linux hardware tester (I own 30+ mainboards and many different
graphics cards in my apartment.), I can say that activating "USB emulation"
"USB keyboard/mouse emulation" "USB keyboard for DOS" or whatever terminology
used to active USB keyboard/mouse port 60H/64H emulation in BIOS setup does not
cause ACPI S3 State related freezes for the most part.
Most ACPI S3 State freezes are Linux device driver bug related, and in
particular, graphics cards related from my extensive experience dealing with
this issue for 2 years.
The only expections I know are ASUS mainboards that happened to have NVIDIA
nForce 430i (MCP51) chipset like ASUS P5N-E SLI and ASUS A8N-LA mainboards.

http://www.asus.com/Motherboards/Intel_Socket_775/P5NE_SLI
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00647121&dlc=en

I use USB emulation so that I don't lose keyboard control in some programs.
If I am correct, when Ubuntu boots from a DVD, it will need USB emulation for
the keyboard to work since USB is not fully initialized at that point.
At least that is what I read somewhere.

Regards,

fpgahardwareengineer

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