Mouse pointer missing in qemu

[Greg]

Hi,

I am running a Chromium OS image under kvm/qemu using the instructions at http://www.chromium.org/chromium-os/developer-guide. Unfortunately however, my mouse pointer is missing. Does anyone know how to resolve this issue? I don't see anything in the guide mentioning that anything specific is needed to get the mouse to work.

Regards,

Greg Kerr

[Mike Frysinger]

what board are you targeting ?  are you running ToT or a branch ?

if it's amd64-generic, and you're using ToT, it might be freon related, but that should have been fixed now ... i explicitly asked about vm behavior :).

-mike

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[Greg Kerr]

Thanks for following up. Indeed I am running amd64-generic from ToT with the following command:

sudo kvm -m 1024 -vga cirrus -pidfile /tmp/kvm.pid -net nic,model=virtio -net user,hostfwd=tcp::9222-:22 -hda build/images/amd64-generic/R50-7844.0.2016_01_19_1449-a1/chromiumos_qemu_image.bin

Regards,

Greg

[Mike Frysinger]

[ +hshi, +spang ]

let's loop in some guys who should know, or should know who should know ;)

-mike

[Michael Spang]

[2nd try from the correct account]

On Wed, Jan 20, 2016 at 2:09 PM Michael Spang <sp...@google.com> wrote:

I think cirrus doesn't implement cursor modesetting at all. So there's no cursor.

One workaround is, use the keyboard to navigate over to the shelf menu, and enable either magnifier or large mouse cursor under accessibility. Those will both put you into cursor compositing mode.

Some future directions that'd make this better

- Use the virtio drm driver instead of cirrus. However even our newest kernel is too old.

- Add a chrome flag to force composited cursor, and pass this flag when running in a VM.

Michael

On Tue, Jan 19, 2016 at 6:00 PM Haixia Shi <hs...@chromium.org> wrote:

CC marcheu and zachr

Does qemu drm support cursor?

[Denis Loginov]

I'm experiencing this issue as well. Have you been able to resolve it?

[Zach Reizner]

QEMU emulates a cirrus graphics card and Chrome OS uses that card via the cirrus drm driver. That driver is missing hardware cursor support, and Chrome OS doesn't try to emulate cursor behavior in software. The cursor has been missing since the switch to Freon in VMs around November 2014.