Hello,

> 1) Hardware that used to work with 4.4 or 4.8 no longer works with 4.9.

Using it on a Lenovo X250 (i3-5010U), and other desktops.

Experiencing consistently the "no wifi after resume" which was working fine 
with 4.4.x

> 4) General feedback on the 4.9 kernel.

Oh, yeah... I have started experiencing quite annoying internet connectivity 
issues, very, very difficulty to troubleshot. Symptoms are:

- Web browsing fails with ERR_EMPTY_RESPONSE, pages load partially never 
reaching some of the content.
- SSH sessions can hang while exchanging keys, and if the recover can last for 
hours.
- Pinging sys-net from sys-firewall sometimes stops responding, but that does 
not happen consistently with the higher level issues (browsing from any VM can 
be impossible, and still ping works) 

After 4 days of troubleshooting (switching browser versions, browser brands, 
changing templates, replacing openwrt+mwan3 home router with direct connections 
from ISP demarc to the machine, using different ISPs, doing all the same on a 
brand new R3.2 + "--enablerepo=qubes*testing", creating new 
sys-net+sys-firewall based on different templates, and so on...) y have just 
found that taking a failing setup and setting the kernels of all involved VMs 
to 4.4.67-12 makes the problem disappear.

It seems pretty repeatable, and would love to provide debugging info, although 
I do not know where to look for.

> 4.9.29 was just released today, so before I send in a Pull Request, let
> me know how 4.9.28 performs and if changes to the kernel config may need
> to be made.

Let me know if this makes sense and you can help me provide more meaningful 
debug info. Maybe this does not happen to anybody else. Drove me crazy the 
whole weekend, by the way :-)

Cheers,
///Pablo

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