Bug 9 - Using tab to edit cmdline doesn't work on EFI
Summary: Using tab to edit cmdline doesn't work on EFI
Status: CONFIRMED
Alias: None
Product: Syslinux
Classification: Unclassified
Component: syslinux (show other bugs)
Version: 6.01
Hardware: PC Linux
: --- major
Assignee: H. Peter Anvin
URL:
Depends on:
Blocks:
 
Reported: 2013-07-18 13:33 PDT by Matt Fleming
Modified: 2014-10-03 21:06 PDT (History)
5 users (show)

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Description Matt Fleming 2013-07-18 13:33:30 PDT 
Trying to edit the cmdline from menu.c32 or vesamenu.c32 (using the TAB key) results in a garbaged display.
Comment 1 Ady 2014-06-17 03:03:34 PDT 
In EFI, in addition to having to use:
 MENU RESOLUTION 1024 768 

in syslinux.cfg for vesamenu.c32 in EFI so to be able to see the command line after pressing TAB from a selected vesamenu item, the
 MENU CLEAR 

directive only moves the cursor to home (upper-left corner of the screen if there is no 'MENU HSHIFT', 'MENU VSHIFT' or similar directives),
but it does not actually clear the screen; e.g. it leaves residual text that was previously present on the screen.

Pressing Ctrl+L behaves the same as MENU CLEAR, leaving remnants.

The combination of an inadequate screen resolution in vesamenu EFI with the leftovers produces the "dirty display".

Regards,
Ady.