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vnc: add configurable keyboard delay

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Limits the rate kbd events from the vnc server are forwarded to the
guest, so input devices which are typically low-bandwidth can keep
up even on bulky input.

v2: update documentation too.
v3: spell fixes.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Yang Hongyang <hongyang.yang@easystack.cn>
Message-id: 1464762150-25817-1-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2016-06-01 08:22:30 +02:00
parent 8efa5f29f8
commit c5ce833344
3 changed files with 20 additions and 2 deletions
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8
qemu-options.hx
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@ -1410,6 +1410,14 @@ everybody else. 'ignore' completely ignores the shared flag and
allows everybody connect unconditionally. Doesn't conform to the rfb
spec but is traditional QEMU behavior.
@item key-delay-ms
Set keyboard delay, for key down and key up events, in milliseconds.
Default is 1. Keyboards are low-bandwidth devices, so this slowdown
can help the device and guest to keep up and not lose events in case
events are arriving in bulk. Possible causes for the latter are flaky
network connections, or scripts for automated testing.
@end table
ETEXI