From 84f48228237037737b615946699071d5b88ccb4c Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Mon, 26 Jan 2009 14:58:28 -0800 Subject: Fixup bogus VBT modes when detected Several VBT modes out in the wild have H or VSyncEnd values greater than the H or VTotal value. This clearly ends up creating a bad mode, causing some panels to either ignore the timing or display some sort of corrupt image. Check for these cases and fix them up by default, making things work for several Dell and Sony machines. Fixes FDO bug #17292. (cherry picked from commit 57a02b50c60c10a25ff0f3cd93af9f37fa0d1b11) --- src/i830_bios.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/i830_bios.c b/src/i830_bios.c index 72408f0f..6baacd48 100644 --- a/src/i830_bios.c +++ b/src/i830_bios.c @@ -135,6 +135,12 @@ parse_panel_data(I830Ptr pI830, struct bdb_header *bdb) fixed_mode->Clock = _PIXEL_CLOCK(timing_ptr) / 1000; fixed_mode->type = M_T_PREFERRED; + /* Some VBTs have bogus h/vtotal values */ + if (fixed_mode->HSyncEnd > fixed_mode->HTotal) + fixed_mode->HTotal = fixed_mode->HSyncEnd + 1; + if (fixed_mode->VSyncEnd > fixed_mode->VTotal) + fixed_mode->VTotal = fixed_mode->VSyncEnd + 1; + xf86SetModeDefaultName(fixed_mode); pI830->lvds_fixed_mode = fixed_mode; -- cgit v1.2.3