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| author | Christian Trefzer <ctrefzer@gmx.de> | 2006-01-14 13:21:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-14 18:27:14 -0800 |
| commit | 4836f5749e55663f884ea25920ff88de7822f0a8 (patch) | |
| tree | 6d25b5da25bc64b92ec73e9cac00fe44bfeef08c | |
| parent | 16ab3adf562fb723d9085c998637f214b10072c5 (diff) | |
| download | linux-3.10-4836f5749e55663f884ea25920ff88de7822f0a8.tar.gz linux-3.10-4836f5749e55663f884ea25920ff88de7822f0a8.tar.bz2 linux-3.10-4836f5749e55663f884ea25920ff88de7822f0a8.zip | |
[PATCH] neofb: take existing display configuration as default
On a Dell Latitude CPi-A I noticed a strangeness wrt. the handling of an
external monitor by the neomagic framebuffer driver, namely when the laptop is
docked in a C/Dock II with the lid shut.
A cold boot would result in the BIOS configuring the video chip to use the
"external monitor only" mode, yet neofb would default to "internal LCD only".
An attempt for a quick fix by using the Fn-F8 keystroke to toggle the display
combination modes resulted in a reproductible hard lock, powering down being
the only solution.
The attached patch makes neofb probe the register for the current display
mode, using that value as a default if nothing was specified as kernel/module
parameter.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/video/neofb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/neofb.c b/drivers/video/neofb.c index e18c9f98a40..747602aa561 100644 --- a/drivers/video/neofb.c +++ b/drivers/video/neofb.c @@ -853,7 +853,7 @@ static int neofb_set_par(struct fb_info *info) /* If the user did not specify any display devices, then... */ if (par->PanelDispCntlReg1 == 0x00) { /* Default to internal (i.e., LCD) only. */ - par->PanelDispCntlReg1 |= 0x02; + par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03; } /* If we are using a fixed mode, then tell the chip we are. */ |