Hi Marc-André,
>>> --- hw/ac97.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 79 insertions(+), 0 deletions(-) diff --git a/hw/ac97.c b/hw/ac97.c index ba94835..4a7c4ed 100644 --- a/hw/ac97.c +++ b/hw/ac97.c @@ -431,6 +431,63 @@ static void reset_voices (AC97LinkState *s, uint8_t ; ... -- 1.7.6.2 >>> According to my test, my guest OS also can support for volume control even I don't apply the patch to my code. I run my Ubuntu guest OS via the following command: qemu-system-x86_64 -M pc --enable-kvm -m 512 -smp 1 -name Ubuntu -localtime -boot c -drive file=ubuntu.img,if=virtio,index=0 -vga cirrus -chardev stdio,id=mon0 -mon chardev=mon0,mode=readline -chardev socket,id=mon1,host=localhost,port=5554,server,nowait,telnet -mon chardev=mon1,mode=control -soundhw ac97 By the way, my host OS is also Ubuntu 11.04 and I haven't apply your patch [PATCH 04/11] and [PATCH 05/11] for hw/ac97.c to my code. Are there any problems for my test? Best Regards Wayne Gao