Re: Laptop recommendations?

Ian Smith <[email protected]> writes:

> On Mon, 27 Jun 2011, Bengt Ahlgren wrote:
>  > Ian Smith <[email protected]> writes:
> [..]
>  > > How well does suspend/resume work on these?  An absolute must for me.
>  > >
>  > > My Thinkpad T23s always resumed 100% reliably through 6.x and 7.x, still 
>  > > does at 7.4-R, but since 8.0-R through to 8.2-R they completely freeze
>  > > for an even 60 seconds on resume, after which I often get a bunch of 
>  > > 'time went backwards' errors - sometimes on every process running - so 
>  > > I've never felt able to really trust it after resuming.  Noone seems to 
>  > > know about that issue; probably no developers have i386 laptops anymore.
>  > 
>  > Me too for a Thinkpad X40 (running 8.2-R).  I tracked down the stall on
>  > resume to uhci.ko.  Without that module loaded, there was no stall.
>  > Other usb modules did not make any difference.  I unfortunately did not
>  > have time to investigate it further.  My laptop comes to life reliably
>  > after the stall.
>
> I'm VERY happy to report that building a kernel from 8.2-R GENERIC only 
> excluding device uhci (and ohci and ehci that the T23 don't use anyway), 
> loading uhci at boot, unloading it in rc.suspend and loading it again in 
> rc.resume does completly fix the 60 second stall problem on my T23.
>
> It doesn't mind if I forget and leave a USB memstick attached through 
> suspend/resume, though of course it gets confused if a slice was mounted 
> .. even then, it doesn't panic or require more than umount; mount.
>
> Thanks heaps for this.  I'll report back on an old thread in -stable, 
> find and cc a couple of other people who confirmed the same stall issue, 
> at least one being on a Thinkpad, T43 I think.
>
> It should help having narrowed this problem down to uhci, maybe a proper 
> fix can be found before 9.0 is released, but meanwhile I'm just stoked.

See:

http://lists.freebsd.org/pipermail/freebsd-usb/2011-June/010341.html

for a patch that solves the uhci stall for me!

Also discussed here:

http://lists.freebsd.org/pipermail/freebsd-stable/2011-September/064002.html

Bengt
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