From 1c55f18717304100a5f624c923f7cb6511b4116d Mon Sep 17 00:00:00 2001 From: Ingo Brueckl Date: Wed, 10 Dec 2008 23:35:00 +0100 Subject: console ASCII glyph 1:1 mapping For the console, there is a 1:1 mapping of glyphs which cannot be found in the current font. This seems to be meant as a kind of 'emergency fallback' for fonts without unicode mapping which otherwise would display nothing readable on the screen. At the moment it affects all chars for which no substitution character is defined. In particular this means that for all chars (>= 128) where there is no iso88591-1/unicode character (e.g. control character area) you'll get the very strange 1:1 mapping of the (cp437) graphics card glyphs. I'm pretty sure that the 1:1 mapping should only affect strict ASCII code characters, i.e. chars < 128. The patch limits the mapping as it probably was meant anyway. Signed-off-by: Ingo Brueckl Acked-by: H. Peter Anvin Cc: Egmont Koblinger Signed-off-by: Linus Torvalds --- drivers/char/vt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/vt.c b/drivers/char/vt.c index a5af6072e2b..008176edbd6 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -2274,7 +2274,7 @@ rescan_last_byte: continue; /* nothing to display */ } /* Glyph not found */ - if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { + if ((!(vc->vc_utf && !vc->vc_disp_ctrl) && c < 128) && !(c & ~charmask)) { /* In legacy mode use the glyph we get by a 1:1 mapping. This would make absolutely no sense with Unicode in mind, but do this for ASCII characters since a font may lack -- cgit v1.2.3