Windows XP displays black screen when smp option is used

Bug #1914294 reported by John Arbuckle
This bug affects 1 person
Affects Status Importance Assigned to Milestone

Bug Description

When I use Windows XP with the -smp option, the screen goes black. The only thing I can see is a cursor. I have tried -smp 2, -smp cores=4, and -smp cores=2.

My info:

M1 Mac
Mac OS 11.1
QEMU 5.2 at cf7ca7d5b9faca13f1f8e3ea92cfb2f741eb0c0e.

32-bit Windows XP SP3 build 2600.

Revision history for this message
John Arbuckle (programmingkidx) wrote :

Command line to reproduce this issue:
qemu-system-i386 -m 700 -hda <Windows XP HD image file> -smp 2

Last commit tested with this problem: 1214d55d1c41fbab3a9973a05085b8760647e411

Revision history for this message
John Arbuckle (programmingkidx) wrote :

I restarted QEMU without the '-smp 2' option and Windows XP started working again. The only problem is the host CPU usage will stay at 100% even with the guest CPU load being close to 0%. The only way to fix this problem that I know currently is to reinstall Windows XP.

Revision history for this message
John Arbuckle (programmingkidx) wrote :

To fix this problem open Windows XP's System Restore and restore from a point before using the smp option.

Revision history for this message
Thomas Huth (th-huth) wrote :

The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.

If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".

If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:

1) If you already have an account on, please open a new ticket
for this problem in our new tracker here:

and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.

2) If you don't have an account on and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" or "Confirmed" within the next 60 days (other-
wise it will get closed as "Expired"). We will then eventually migrate
the ticket automatically to the new system (but you won't be the reporter
of the bug in the new system and thus you won't get notified on changes

Thank you and sorry for the inconvenience.

Changed in qemu:
status: New → Incomplete
Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for QEMU because there has been no activity for 60 days.]

Changed in qemu:
status: Incomplete → Expired
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