From d3b0db6dfea6b3a9ee0d96aceb796bdcafa84314 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Wed, 12 Jul 2017 14:43:45 +0200 Subject: [PATCH] vnc: Set default kbd delay to 10ms The current VNC default keyboard delay is 1ms. With that we're constantly typing faster than the guest receives keyboard events from an XHCI attached USB HID device. The default keyboard delay time in the input layer however is 10ms. I don't know how that number came to be, but empirical tests on some OpenQA driven ARM systems show that 10ms really is a reasonable default number for the delay. This patch moves the VNC delay also to 10ms. That way our default is much safer (good!) and also consistent with the input layer default (also good!). Signed-off-by: Alexander Graf Reviewed-by: Daniel P. Berrange Message-id: 1499863425-103133-1-git-send-email-agraf@suse.de Signed-off-by: Gerd Hoffmann --- qemu-options.hx | 2 +- ui/vnc.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/qemu-options.hx b/qemu-options.hx index 76b1c67737..6909285e85 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1753,7 +1753,7 @@ 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 +Default is 10. 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. diff --git a/ui/vnc.c b/ui/vnc.c index 26136f5d29..eb91559b6b 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -3808,7 +3808,7 @@ void vnc_display_open(const char *id, Error **errp) } lock_key_sync = qemu_opt_get_bool(opts, "lock-key-sync", true); - key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 1); + key_delay_ms = qemu_opt_get_number(opts, "key-delay-ms", 10); sasl = qemu_opt_get_bool(opts, "sasl", false); #ifndef CONFIG_VNC_SASL if (sasl) {