I am running the new kernel, 4.17.6. I have carefully started tasks and suspended. With 17.5, when I got to running QEMU, having a VM (F21) running, and Firefox in it accessing some sites, I got the suspend lockup.

I have gotten past that point with 17.6. I won't say all is well with this problem until I survive tomorrow's half-dozen or so suspends as I move between sessions.

The CFRG session was pretty good this time:

https://datatracker.ietf.org/meeting/102/materials/agenda-102-cfrg-03

It was good to see Hugo (creator of HMAC) again after a lot of years only email contact. And more progress from the Keccak team. Plus lots of other good crypto progress. Apple seems to be really serious in their participation.

On 07/16/2018 11:05 AM, Ed Greshko wrote:

On 07/16/18 21:46, Robert Moskowitz wrote:

Just hung again on suspending.  I came up this time on the `7.3 kernel, will see if
this one works.  The last messages were:

Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=filter family=2 entries=95
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=nat family=2 entries=57
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=mangle family=2 entries=41
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=raw family=2 entries=28
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=filter family=10 entries=86
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=nat family=10 entries=52
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=mangle family=10 entries=40
Jul 16 07:59:36 lx121e audit: NETFILTER_CFG table=raw family=10 entries=31
Jul 16 07:59:36 lx121e systemd-sleep[16470]: Suspending system...
Jul 16 07:59:36 lx121e kernel: PM: suspend entry (deep)

From the 'good' suspend I know that next is nm-dispactcher.  I wonder that with
QEMU running and all it has to do to support its virtual network interface if this
is where the hangup is happening?

FWIW, I decided to do some testing on my more "powerful" desktop.  Not a fan of
suspending it in the past due to video issues....long story.

Anyway, my desktop is running
[egreshko@meimei ~]$ uname -r
4.17.5-200.fc28.x86_64

I then started an F28 VM under QEMU.  For sort of proper support of IPv6 I use a
mactap and my links are as follows....

egreshko@meimei ~]$ ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT
group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode
DEFAULT group default qlen 1000
    link/ether 40:61:86:7c:2b:db brd ff:ff:ff:ff:ff:ff
3: wlp4s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode
DORMANT group default qlen 1000
    link/ether e6:87:9b:80:eb:8b brd ff:ff:ff:ff:ff:ff
4: wlp0s29u1u2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode
DORMANT group default qlen 1000
    link/ether cc:e1:d5:3e:88:e7 brd ff:ff:ff:ff:ff:ff
5: macvtap0@enp2s0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc fq_codel
state UP mode DEFAULT group default qlen 500
    link/ether 52:54:00:e9:37:ee brd ff:ff:ff:ff:ff:ff

I then suspended the desktop using "echo mem > /sys/power/state"

The power button on the desktop almost immediately glowed amber and the monitor
showed "blue" indicating it had no input.

I pushed the power button to restore and everything came up well.  (Aside from some
video issues). 

I then did this 6 more times with no problems.

Again, there were only 3 or 4 lines in the journal when I issued the "echo" command. 
The journal then seemed to pick up with suspend info *after* I hit the power button.

So, I would recommend you try the "alternate" method to suspend your system to see if
it helps in any way.

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