[Bug 39100] New: VDAgent fails to respond

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39100

           Summary: VDAgent fails to respond
           Product: Spice
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Windows (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: win32 vd_agent
        AssignedTo: spice-bugs at lists.freedesktop.org
        ReportedBy: jsullivan at opensourcedevel.com


Created an attachment (id=48921)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48921)
First set of vdagent logs

We are often unable to connect to our SPICE guest or the session seems to die. 
We then connect as administrator via RDP and restart the RHEV Spice Agent and
all is well again.

More specifically, often, when we try to access the guest via SPICE, we simply
get a black screen and then a connection timeout.  We connect to the guest via
RDP as admin, restart RHEV Spice Agent service and we are then able to login. 
Every once in a while, the SPICE client stops responding.  We restart the RHEV
Spice Agent service as described and we are now able to work again.  There is
nothing in event logs to indicate there was a problem.

The guests are Windows Server 2008 and Windows 7 - both 64 bits.  The host is
Fedora 15 and the clients are spicec 0.8.1 running on Debian Squeeze.

I thought our qemu configuration must be off or the needed
options were not support in our version (0.8.8).  However, that does not
appear to be the case:

   <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09'
function='0x0'/>
    </controller>
[ports='16' seems to be missing - I tried adding it but it was ignored and
subsequently removed]
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>

When I dump the XML to native, I get:
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x9
-chardev spicevmc,id=charchannel0,name=vdagent
-device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0

The virtio-serial driver is installed.  We have specifically set power save to
performance and set suspend video to never.  That appeared to make it better
but then it happened again.  I was not able to open a spice session -
just a black screen followed by "Error: unhandled exception: vdagent
timeout".  I double checked the Power Settings while unable to login and
they were indeed on high performance with suspend video and put computer to
sleep set to never.

I can also add that the keyboard was extremely lagged in SPICE.  I was
using it without disabling effects so I exited and went in via RDP and
noticed no lag.  I also ran background pings to see if we had problems
on the connection and it was quite healthy.  I then tried SPICE again
disabling all effects.  That's when I noticed I could not get in.  I
restarted RHEV Spice Agent and was now able to get in with effects
disabled but it was still very lagged.  It had clearly disabled effects;
the difference in the font rendering was quite noticeable.  I exited
again and tried via RDP and there was no lag.  I then tried connecting
again and once again got only the black screen.

It was at that point that I grabbed the attached logs (vdagentlogs.zip).  I
then restarted the agent again, went in via SPICE without disabling effects and
the response is much better now although keyboarding is still noticeably
less crisp than RDP.

I'll attach two later sets of logs taken while unable to connect via SPICE. 
One is from yesterday and the other is from this morning.  The interesting
thing about the one from this morning is that it looks like vdservice.log did
was not modified since I logged out last night.

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