Re: [Qemu-devel] bad USB tablet update rate on qemu-1.0

[Erik Rull]

Andreas Färber wrote:
> Am 19.01.2012 17:40, schrieb Erik Rull:
> > Erik Rull wrote:
> > > Erik Rull wrote:
> > > > Erik Rull wrote:
> > > > > Anthony Liguori wrote:
> > > > > > On 12/19/2011 03:33 PM, Erik Rull wrote:
> > > > > > > Hi all,
> > > > > > >
> > > > > > > coming from qemu 0.14 the usbdevice tablet update rate gets really
> > > > > > > bad in
> > > > > > > qemu-1.0 with the same guest.
> > > > > >
> > > > > > What's the specific guest?
> > > > > >
> > > > > > Regards,
> > > > > >
> > > > > > Anthony Liguori
> > > > >
> > > > > It's a Windows XP guest. It was fine in 0.14
> > > > >
> > > > > Thanks.
> > > > >
> > > > > Best regards,
> > > > >
> > > > > Erik
> > > >
> > > > Any progress here? I tested it on another CPU board there it was worse -
> > > > only 1-2 cursor updates per second :-(
> > > > I tried to use the wacom-tablet but didn't find a driver that works.
> > > >
> > > > Best regards,
> > > >
> > > > Erik
> > >
> > > Hi all,
> > >
> > > today I tested some stuff with VNC for remote access of the VM - there
> > > the
> > > update rate of the USB tablet (mouse cursor) was really great. So the
> > > question is now:
> > > - Same host operating system for 0.14 and 1.0
> > > - Same command line parameters beside the vnc option
> > > Why is the native mouse on the qemu 0.14 system good for both vnc and
> > > native and on the qemu 1.0 system only good for vnc and bad for the
> > > native
> > > hardware mouse?
> > >
> > > Maybe this helps finding the source of evil...
> > > If you have ideas what to change / patches to test, just let me know.
> > >
> > > Best regards,
> > >
> > > Erik
> >
> > Hi all,
> >
> > I additionally tested -std vga to exclude that it might be related to
> > the cirrus emulation - but same result. So there seems to be a
> > difference between the captured cursor for the native X-Windows window
> > and the VNC window that occured somewhere between 0.14 and 1.0.
>
> Then try `git bisect start v1.0 v0.14.0' to find out when exactly the
> perceived behavior changed. :)
>
> Andreas

Hi Andreas,

thanks for the hint, I haven't used git up to now. Very interesting feature.
I just did a clone of the current qemu-kvm (which I use) and started to 
bisect, but got an error, where I don't know how to proceed:
address@hidden:~/qemu-test/qemu-kvm$ git bisect good qemu-kvm-0.14.0
You need to start by "git bisect start"
Do you want me to do it for you [Y/n]?
address@hidden:~/qemu-test/qemu-kvm$ git bisect bad qemu-kvm-1.0
Bisecting: 2043 revisions left to test after this
fatal: Entry 'roms/seabios' not uptodate. Cannot merge.
address@hidden:~/qemu-test/qemu-kvm$

Any ideas?
I did a git pull, but I just got the response that it is already up to date...

Best regards,

Erik