Since 4c993d8a we failed to set this important capability, which allows starting a domain with QXL video card. We set DEVICE_QXL capability bit instead, which is not necessary wrong. Anyway, if qemu supports the new '-device qxl' it supports older '-vga qxl' as well. The latter is used for the primary (the first) qxl video card, the former for other video cards. --- Other approach is to set QEMU_CAPS_VGA_QXL unconditionally as supported by all qemu-1.2+ in qemuCapsInitQMPBasic(). But I think this one is slightly nicer. src/qemu/qemu_capabilities.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index f49a31c..e16bc70 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -2018,6 +2018,9 @@ qemuCapsProbeQMPObjects(qemuCapsPtr caps, /* Prefer -chardev spicevmc (detected earlier) over -device spicevmc */ if (qemuCapsGet(caps, QEMU_CAPS_CHARDEV_SPICEVMC)) qemuCapsClear(caps, QEMU_CAPS_DEVICE_SPICEVMC); + /* If qemu supports newer -device qxl it supports -vga qxl as well */ + if (qemuCapsGet(caps, QEMU_CAPS_DEVICE_QXL)) + qemuCapsSet(caps, QEMU_CAPS_VGA_QXL);

On 01/04/2013 05:00 PM, Michal Privoznik wrote: > Since 4c993d8a we failed to set this important capability, which > allows starting a domain with QXL video card. We set DEVICE_QXL > capability bit instead, which is not necessary wrong. Anyway, if > qemu supports the new '-device qxl' it supports older '-vga qxl' > as well. The latter is used for the primary (the first) qxl video > card, the former for other video cards. > --- > > Other approach is to set QEMU_CAPS_VGA_QXL unconditionally > as supported by all qemu-1.2+ in qemuCapsInitQMPBasic(). > But I think this one is slightly nicer. > > src/qemu/qemu_capabilities.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c > index f49a31c..e16bc70 100644 > --- a/src/qemu/qemu_capabilities.c > +++ b/src/qemu/qemu_capabilities.c > @@ -2018,6 +2018,9 @@ qemuCapsProbeQMPObjects(qemuCapsPtr caps, > /* Prefer -chardev spicevmc (detected earlier) over -device > spicevmc */ > if (qemuCapsGet(caps, QEMU_CAPS_CHARDEV_SPICEVMC)) > qemuCapsClear(caps, QEMU_CAPS_DEVICE_SPICEVMC); > + /* If qemu supports newer -device qxl it supports -vga qxl as > well */ > + if (qemuCapsGet(caps, QEMU_CAPS_DEVICE_QXL)) > + qemuCapsSet(caps, QEMU_CAPS_VGA_QXL); > return 0; > } I don't think it is necessary to add this code. because we have set the caps flag in qemuCapsParseHelpStr() if (strstr(p, "|qxl")) qemuCapsSet(caps, QEMU_CAPS_VGA_QXL);

The problem here is about collecting cap flags via QMP, we need to set QEMU_CAPS_VGA_QXL unconditionally but still in discussion. Patch from Doug Goldstein in [libvirt] [PATCH] The -vga CLI arg accepts qxl in qemu 1.2+ always The -vga command always accepts qxl in 1.2 and newer. --- src/qemu/qemu_capabilities.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index f49a31c..c3ab488 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -2282,6 +2282,7 @@ qemuCapsInitQMPBasic(qemuCapsPtr caps) qemuCapsSet(caps, QEMU_CAPS_NO_USER_CONFIG); qemuCapsSet(caps, QEMU_CAPS_NETDEV_BRIDGE); qemuCapsSet(caps, QEMU_CAPS_SECCOMP_SANDBOX); + qemuCapsSet(caps, QEMU_CAPS_VGA_QXL); }