From d38b102cb9f3c269391d026d2022f10a6e1b1f11 Mon Sep 17 00:00:00 2001 From: Rahul Saxena Date: Fri, 8 Feb 2013 16:15:25 -0800 Subject: meta-cedartrail: Update README with workaround for Yocto Bugzilla #3607 The PVR driver has an issue that for some systems it causes it to incorrectly assume that an LVDS display is connected while in fact a VGA display is connected and vice versa. The README file is updated with the work-around for this issue. Signed-off-by: Rahul Saxena Signed-off-by: Tom Zanussi --- meta-cedartrail/README | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) (limited to 'meta-cedartrail/README') diff --git a/meta-cedartrail/README b/meta-cedartrail/README index 0d166b22..e394faf6 100755 --- a/meta-cedartrail/README +++ b/meta-cedartrail/README @@ -51,7 +51,7 @@ Table of Contents I. Building the meta-cedartrail BSP layer II. Booting the images in /binary - +III. Miscellaneous Notes I. Building the meta-cedartrail BSP layer ========================================= @@ -188,3 +188,28 @@ EXTRA_IMAGE_FEATURES = "debug-tweaks" and change above line to.. EXTRA_IMAGE_FEATURES = "debug-tweaks tools-testapps" + + +Work Around for VGA and LVDS Display issue in PVR driver +-------------------------------------------------------- + +The PVR driver has a issue that for some systems it causes +it to incorrectly assume that a LVDS display is connected +while infact a VGA display is connected and Vice Versa. +If your VGA or LVDS display does not work with +"cedartrail" MACHINE, then if you have connected a VGA display, +add the following to the kernel command line: + +video=LVDS-1:d video=VGA-1:e + +If you have connected a LVDS display, add the following to +the kernel command line: + +video=LVDS-1:e video=VGA-1:d + +The kernel boot command line can be updated before BSP build by +editing the "APPEND +=..." line in conf/machine/cedartrail.conf file. + +The kernel command line can also be edited after a image is built by +editing the syslinux.cfg file in the USB flash device on which +the image is installed. -- cgit v1.2.3-54-g00ecf