[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Frediano Ziglio]

wddm dod 0.17 version released which fixes the issue guest side.

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Frediano Ziglio]

Similar issue, seems not caused by save/restore/migration but is still 
detecting offset problems with resource deallocation.
See https://lists.freedesktop.org/archives/spice-devel/2017-April/037248.html.

Still working on some updates for the driver.

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Frediano Ziglio]

Next version of the driver will solve the problem (already fixed in
master).

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Gerd Hoffmann]

Will be fixed in the windows driver, yes.

But throwing core dumps isn't exactly nice, even in case the guest is
buggy, thats why the qemu workaround, so we simply refuse to live-
migrate instead of crashing.

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Marc Pignat]

Did I miss something or this is a bug in the windows qxl driver and
should be fixed there?

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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Re: [Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Gerd Hoffmann]

On Mo, 2017-04-10 at 11:56 +, Frediano Ziglio wrote:
> Is this problem limited to commands or also to data attached to the commands?

Everything which contains QXLReleaseInfo and is released via release
ring.

> To me looks like a limitation Qemu should remove on the long run.

That is an option, but it is tricky backward-compatibility wise.
What was the reason to move the commands to bar1?

cheers,
  Gerd

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Frediano Ziglio]

Is this problem limited to commands or also to data attached to the commands?
To me looks like a limitation Qemu should remove on the long run.

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[elmarco]

Your approach works ok Gerd with a migration blocker. Are you going to
send a patch?

I am afraid we would have to make this code permanent though, since
there has been several releases of this driver already, and it's much
nicer to block migration than to crash a VM.

I have reached out to wddm driver about the bug.

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Gerd Hoffmann]

Not sure we want a failure mode for pre_save().

If we go for option (a) (from comment 9), I'd add a check when reading
the commands from the ring, not at migration time, so we don't run enter
a state where pre_save() can fail in the first place.  Because that will
break the windows drivers we might add a warning only for 2.9, then for
2.10 raise an error irq.  Something like this:

--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -639,6 +639,24 @@ static int interface_get_command(QXLInstance *sin, struct 
QXLCommandExt *ext)
 qxl->guest_primary.commands++;
 qxl_track_command(qxl, ext);
 qxl_log_command(qxl, "cmd", ext);
+{
+void *msg = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
+if (msg < (void *)qxl->vga.vram_ptr ||
+msg > ((void *)qxl->vga.vram_ptr + qxl->vga.vram_size)) {
+#if 1
+/* temporary, for 2.9 */
+static int once;
+if (!once) {
+fprintf(stderr, "qxl: guest bug: command not in ram bar, "
+"guest not migratable\n");
+once = true;
+}
+#else
+qxl_set_guest_bug(qxl, "command not in ram bar");
+return false;
+#endif
+}
+}
 trace_qxl_ring_command_get(qxl->id, qxl_mode_to_string(qxl->mode));
 return true;
 default:

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Dr. David Alan Gilbert]

An untested hack that might fail cleaner might be:

  error_report("Broken driver . migration failed");
  qemu_file_set_error(migrate_get_current()->to_dst_file, -EINVAL);

(untested, probably needs checking it works with savevm).

I must go around and add a return value to pre_save().

We probably also need to make sure some migration testing gets added to
the driver dev

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Gerd Hoffmann]

Well.  qxl commands are expected to live in bar 0 (same bar where the
rings are too).  vram bar was added as surface storage.

Now the windows drivers started to us vram for qxl commands.  Problem is
we simply can't live-migrate such a guest.  At least not without
changing the vmstate format.  Which isn't something I would attempt just
a few days before release.

We can't throw an error in qxl_pre_save either (and fail migration
instead of aborting).

I don't see an easy way out for 2.9.

Long term options are (a) revert the driver change, and probably add
some checks to qxl to make sure guests don't use vram for commands, or
(b) extend qxl vmstate so we can handle that case.

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Peter Maydell]

** Changed in: qemu
   Status: Fix Released => Confirmed

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[elmarco]

damn launchpad, wrong bug and I can't change it back. Please someone
move it back to New/Confirmed

** Changed in: qemu
   Status: New => Fix Released

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Fix Released

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[elmarco]

Crash reproduced immediately after setting up a win10 VM with qxl driver
10.0.0.15000.

Gerd, are you looking into fixing it? Is it acceptable to crash qemu if
the driver is faulty?

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Gerd Hoffmann]

I put my money on that one:

https://cgit.freedesktop.org/spice/win32/qxl-wddm-
dod/commit/?id=f6e099db39e7d0787f294d5fd0dce328b5210faa

commit f6e099db39e7d0787f294d5fd0dce328b5210faa
Author: Sameeh Jubran 
Date:   Sun Sep 11 16:05:24 2016 +0300

Use the second bar (VRAM) for qxl command buffer.

Based on a patch by Sandy Stutsman 

Signed-off-by: Sameeh Jubran 
Acked-by: Frediano Ziglio 

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Dr. David Alan Gilbert]

I can see a bunch of similar looking failures in Fedora's automatic
backtrace stats system

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Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[rubenvb]

I'm running into this issue as well:
Arch Linux
Qemu 2.8.0
spice guest tools: 0.132
QXL driver version (as reported by Windows Device Manager): 10.0.0.15000

Everything else works great. It would save me a lot of rebooting if this could 
get fixed.
If there is anything I can do or try, I'll be glad to help.

Relevant log of VM boot and crash on selecting suspend action in virt-
manager:

2017-04-06 16:59:24.681+: starting up libvirt version: 3.1.0, qemu version: 
2.8.0, hostname: arch-vaio.localdomain
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin 
QEMU_AUDIO_DRV=spice /usr/bin/qemu-system-x86_64 -name 
guest=Windows,debug-threads=on -S -object 
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-9-Windows/master-key.aes
 -machine pc-i440fx-2.7,accel=kvm,usb=off,vmport=off,dump-guest-core=off -cpu 
core2duo,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -m 2048 -realtime 
mlock=off -smp 2,sockets=1,cores=2,threads=1 -uuid 
f14684d3-5f81-4743-8512-e516d85ca2c9 -no-user-config -nodefaults -chardev 
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-9-Windows/monitor.sock,server,nowait
 -mon chardev=charmonitor,id=monitor,mode=control -rtc 
base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet 
-no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot 
strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device 
ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive 
file=/mnt/media/Qemu/windows10.qcow2,format=qcow2,if=none,id=drive-virtio-disk0 
-device 
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
 -drive 
file=/usr/share/spice-guest-tools/spice-guest-tools.iso,format=raw,if=none,id=drive-ide0-0-1,readonly=on
 -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -netdev 
user,id=hostnet0 -device 
rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:44:08:31,bus=pci.0,addr=0x3 
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 
-chardev spicevmc,id=charchannel0,name=vdagent -device 
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
 -device usb-tablet,id=input2,bus=usb.0,port=3 -spice 
port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on
 -device 
qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pci.0,addr=0x2
 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device 
hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev 
spicevmc,id=charredir0,name=usbredir -device 
usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=1 -chardev 
spicevmc,id=charredir1,name=usbredir -device 
usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=2 -device 
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on
char device redirected to /dev/pts/6 (label charserial0)
main_channel_link: add main channel client
red_dispatcher_set_cursor_peer: 
inputs_connect: inputs channel client create
main_channel_handle_parsed: agent start
ehci warning: guest updated active QH
qemu-system-x86_64: /build/qemu/src/qemu-2.8.0/hw/display/qxl.c:2173: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
2017-04-06 17:00:32.819+: shutting down, reason=crashed

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https://bugs.launchpad.net/bugs/1635339

Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[DocMAX]

I tried other QXL drivers: 22.33.46.473.
These work (but have a older date: 2015-07-28.

17.54.59.923 have the date 2016-04-21.
I got them from this package:

http://depot.flexvdi.com/guest-tools/flexvdi-guest-tools-2.2.11.iso

Those provide something, which lets my window resize freely.

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1635339

Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1635339/+subscriptions

[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[DocMAX]

QXL driver version is 17.54.59.923

Commandline (git compiled today) is:

/usr/sbin/qemu-system-x86_64 -name guest=dc,debug-threads=on -S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-dc
/master-key.aes -machine pc-i440fx-2.7,accel=kvm,usb=off,vmport=off
,dump-guest-core=off -cpu Haswell-
noTSX,+vme,+ds,+acpi,+ss,+ht,+tm,+pbe,+dtes64,+monitor,+ds_cpl,+vmx,+est,+tm2,+xtpr,+pdcm,+osxsave,+f16c,+rdrand,+arat,+tsc_adjust,+xsaveopt,+pdpe1gb,+abm
-drive
file=/usr/share/ovmf/x64/ovmf_code_x64.bin,if=pflash,format=raw,unit=0,readonly=on
-drive
file=/var/lib/libvirt/qemu/nvram/dc_VARS.fd,if=pflash,format=raw,unit=1
-m 2048 -realtime mlock=off -smp 4,sockets=1,cores=4,threads=1 -uuid
647fd6b2-9a88-4219-af46-052f68a539a5 -no-user-config -nodefaults
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-1-dc/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet
-no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1
-boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7
-device ich9-usb-
uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6
-device ich9-usb-
uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 -device ich9
-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 -device
virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive
file=/mnt/shared/server/root/var/lib/libvirt/images/hdd/dc.qcow2,format=qcow2,if=none,id
=drive-virtio-disk0 -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-
disk0,bootindex=1 -netdev tap,fd=27,id=hostnet0,vhost=on,vhostfd=29
-device virtio-net-
pci,netdev=hostnet0,id=net0,mac=52:54:00:58:ce:4e,bus=pci.0,addr=0x3
-chardev pty,id=charserial0 -device isa-
serial,chardev=charserial0,id=serial0 -chardev
spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-
serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
-spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off
,seamless-migration=on -device qxl-
vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pci.0,addr=0x2
-device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-
duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev
spicevmc,id=charredir0,name=usbredir -device usb-
redir,chardev=charredir0,id=redir0,bus=usb.0,port=1 -chardev
spicevmc,id=charredir1,name=usbredir -device usb-
redir,chardev=charredir1,id=redir1,bus=usb.0,port=2 -device virtio-
balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1635339

Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1635339/+subscriptions

[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Dr. David Alan Gilbert]

Hmm docmax on #qemu just complained about a similar error;   although
they were on win2016, and using qemu-2.7 and the latest git versions,
and that assert has been in there for years.

Can you please add the full qemu command line you're using, and the
version of the spice/qxl drivers you're using inside the windows VM.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1635339

Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  New

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+: shutting down

  Please let me know what other information would be relevant!

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1635339/+subscriptions