On 24 Jun 2012, at 21:31, Chris Tapp wrote: > Hi Paul, > > On 24 Jun 2012, at 16:25, Paul Eggleton wrote: > >> On Monday 18 June 2012 22:16:44 Chris Tapp wrote: >>> If I build the RPi kernel (SRCREV 3fc65f9f291fb19cad434968a4a0f66ab749e637) >>> then the board boots as expected. >>> >>> However, if a modify the .config (either manually after -c configure, or by >>> -c menuconfig) so that CONFIG_SND, CONFIG_SND_TIMER, CONFIG_SND_PCM and >>> CONFIG_BCM2835 are set to 'y' (i.e. changed from modules) then the kernel >>> no longer boots. >>> >>> Has anyone else tried to do this? I'm trying to get a kernel that has ALSA >>> working out-of-the-box. >> >> Well, FWIW I can't even get a kernel with the default configuration built >> from >> meta-raspberrypi to boot - I even tried copying it to a Debian SD-card and >> it >> doesn't boot there either. All I get is a black screen or with the newer >> firmware I get the four-colour display which apparently indicates it >> couldn't >> load the kernel. >> >> Any suggestions would be welcome... > > > Firstly: > 1) Are you using the SRCREVs as supplied, or have you updated them? > 2) Which version of the bootfiles are you using? > > Everything is in such a state of flux at the moment that it does seem to be > difficult to be sure what works one day will work if you upgrade anything to > use the latest versions. I can get some combinations to work, the most > up-to-date being: > > 1) Use the bootfiles with SRCREV = "9308c7ed387e5422883753f7fb71a75506abd1f8" > 2) Build the kernel using SRCREV = "3fc65f9f291fb19cad434968a4a0f66ab749e637" > > Later kernels should be 'better', but I've not yet got any to boot. I use the > serial port to monitor the boot and this shows nothing. Not seen if the color > bars show as I've not looked - will do next time I have a play.
Yep, the later kernels just give the four-colour display. I wonder what's changed this time round? > BTW - you need to update the .conf file for the machine to use ttyAMA0 if you > want to use the serial port for kernel debug. > > There have been a lot of changes to the kernel / bootfiles that mean you must > update both to get a working image. Some of these relate to where the image > is loaded, some to how the screen is activated (my config.txt entries to set > the HDMI video mode stopped working at one point). It seems as if nothing is > really fixed at the moment and you need to be prepared to 'do some digging' > if you change anything. When I get a moment I want to suggest that a list of > matched SRCREVs for 'stable' builds that have been verified can be kept > somewhere. > > Chris Tapp > > opensou...@keylevel.com > www.keylevel.com > > > > _______________________________________________ > yocto mailing list > yocto@yoctoproject.org > https://lists.yoctoproject.org/listinfo/yocto Chris Tapp opensou...@keylevel.com www.keylevel.com _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
