On Wed, Nov 08, 2017 at 04:44:37PM +0800, Heyi Guo wrote: > > > 在 11/8/2017 4:34 PM, Ni, Ruiyu 写道: > > No. > > Even a terminal tool can recognize F10, it still needs to translate it into > > "ESC [ V" > > and send the three bytes to firmware. > Got it. But the 2 seconds timeout is not for this situation, right? If > terminal tool could translate and send the key sequence, I think it can > complete 3 bytes transfer in a very short time, isn't it? E.g. 9600 baud / 8 > = 1200 Bytes/s (ignore control bits). > > So 2 seconds timeout is still for user to enter the sequence "ESC [ V" > manually?
No. Alot of software has this kind of delay because it is recommended in some classic unix documentation to avoid mis-interpreting incomplete terminal control sequences coming from slow terminals. Where a "slow terminal" which actually would need such a long delay is a physical terminal from the 70ies of the last century, or a virtual terminal hooked up over a *really* slow network connection. Reducing the delay from 2 seconds to roughly 0.2 seconds should be pretty safe, things are not that slow any more these days :) HTH, Gerd _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
