[Bug 191564] New: [vt] UEFI boot shows that screen is not cleared as kernel starts
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Wed Jul 2 17:52:34 UTC 2014
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191564
Bug ID: 191564
Summary: [vt] UEFI boot shows that screen is not cleared as
kernel starts
Product: Base System
Version: 11.0-CURRENT
Hardware: amd64
OS: Any
Status: Needs Triage
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs at FreeBSD.org
Reporter: emaste at freebsd.org
Created attachment 144346
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=144346&action=edit
screenshot of UEFI vt(4) boot
The UEFI loader uses UEFI's console services for I/O; the vt_efifb driver takes
over for vt(4)'s framebuffer when the kernel boots, but does not clear the
screen first, so some of the previous output remains on screen until it is
scrolled off.
See the attached screenshot - the loader's output finished with "Start @
0xffff...." at the bottom, and the kernel's output started with "GDB: no debug
ports present" at the top.
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