sony-vaio-z-series team mailing list archive

[Adam Williamson <awilliam@xxxxxxxxxx>]

Hi, folks. I'm still trucking with my VPCZ1112GD (alongside its
still-inferior-in-some-ways Dell XPS 13 'replacement'), and have been
irked for some months with it taking an awfully long time to shut down /
reboot. I've noticed two threads in the archive which sound similar:

https://lists.launchpad.net/sony-vaio-z-series/msg02964.html
https://lists.launchpad.net/sony-vaio-z-series/msg02868.html

they all talk about shutdown 'hanging', but I suspect the reporters may
not have waited long enough to find out it actually *does* finally shut
down successfully, after a wait of two minutes or so.

Anyway, this week, I did a bit of poking about, and found out that, for
me, shutdown/reboot works perfectly if I pass the kernel parameter
'reboot=pci'. I filed a bug upstream:

https://bugzilla.kernel.org/show_bug.cgi?id=61721

and a kernel dev has proposed a patch which basically special-cases the
system to use PCI rebooting. However, the proposed patch uses my precise
model name, VPCZ1112GD, so it wouldn't work for any other Z variants: I
don't think the dev is familiar with the intricacies of Z model numbers.
It would probably be helpful, if others are indeed still having issues
with slow shutdown/reboot, if you can test if 'reboot=pci' helps, and if
so, post in the bug report and include your precise model number or,
better, 'dmidecode' output. I suspect the fix should apply to at least
Z11, Z13 and probably just all Z1* models, but it'd be good to have data
to confirm that. That might get us an upstream fix. Thanks folks!
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net
http://www.happyassassin.net