On Sat, Jul 11, 2009 at 5:36 PM, Kevin O'Connor<[email protected]> wrote: > On Sat, Jul 11, 2009 at 02:18:06PM +0300, Marius Cirsta wrote: >>After I give >> the command to load the kernel I get some text for a very brief period >> ( I'm unable to read it ) and then I get a strange image with dots and >> random colours. The thing it though that it's not random , it's the >> same every time. I suspect a memory location or something is being >> shown. It then freezes with the same random pattern. > > What's you're seeing is the kernel image being written to the video > framebuffer. >
Yes, that's what I suspected too. > It's unclear if this causes the kernel to crash or if the kernel is > crashing for some unrelated issue. > >> I'm not very good at this , just a beginner but my question is. Is >> this a problem with Harret or the kernel I'm using, where should I >> focus my efforts. Should I try to establish a network connection to >> Harret and will that give me more messages ? Will that give me the >> kernel output ? > > I'd say this is kernel territory. I don't think network output will > help much - it will only show what's in the log you've already > captured. A serial port (to get kernel debugging) would be very > helpful. > > I think some people have tried increasing RAMADDR (and decreasing > RAMSIZE) so that haret loads the kernel after the framebuffer. You > could try that, but I think it may also require changing the kernel to > know about the new address as well. > Well I did that but and the error message about the overlapping isn't there anymore. What is still a problem is that the same random noise appears on the screen. I think it's the kernel's fault though. As the screen hangs for a bit longer now I managed to snap a picture and this is what it says: Haret boot Shutting down hardware Turning off MMU In preloader PSR=600000df Tags relocated Kernel relocated Initrd relocated Jumping to kernel ... Noise comes un on the screen now. > [...] >> HaRET(4)# boot > [...] >> Video buffer at A8100000 sx=320 sy=240 mx=80 my=40 >> Video Phys FB=c0100000 Fonts=c3d19064 >> Framebuffer overlaps with kernel destination > > -Kevin > Thanks for you help. From what I understand haret does its job and it's the kernel that's the problem now. I'm off to study about that and I guess I'll ask on the some arm mailing lists maybe. If you have some other tips though I'd appreciat them. I know a serial console would be nice but this GPS has only one USB ( device I think ) and SD card slot , that's all on the outside. I'll probably have to pop it open and see what's on the inside and maybe locate some serial connector there or maybe attaching something to the USB somehow. _______________________________________________ Haret mailing list [email protected] https://handhelds.org/mailman/listinfo/haret
