On 22/03/2016 16:55, Ian Lepore wrote: > On Tue, 2016-03-22 at 13:46 +0000, Edward Tomasz Napierala wrote: >> Author: trasz >> Date: Tue Mar 22 13:46:01 2016 >> New Revision: 297190 >> URL: https://svnweb.freebsd.org/changeset/base/297190 >> >> Log: >> Wait for root mount tokens before showing the root mount prompt. >> This restores the pre-r290196 behaviour, eliminating the need to manually >> press '.' a couple of times to get USB to finish probing. >> >> Note that there's still something wrong with the console (character >> echoing doesn't quite work), and there's also a reported problem with >> BHyVe, but those two don't seem related to the problem above. > > Just a datapoint on the echoing... it works fine on a serial console, > it's been years since I've seen glitches at the mountroot prompt. So > the problem may be in vt or kbdmux.
I confirm this is a known issue with vt(4): it uses a callout to refresh the screen, but for reasons unknown to me, the callout is not called anymore on mountroot prompt. I tried to debug this but failed. Since then, I didn't have time to work on this again. So maybe callouts are disabled in this situation. If there is a way to detect that, then vt(4) can go back to a "synchronous mode" where it refreshes the screen after each typed character, like it does when ddb is active. I will repeat this in the bug report. -- Jean-Sébastien Pédron
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