topic Very strange bug in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/Very-strange-bug/m-p/184590#M8429 <HTML><HEAD></HEAD><BODY><P>Hi All,</P><P>I try to work with imx28evk. I use kernel and rootfs from EVK. Loading kernel via tftp, connecting to rootfs via nfs. And if kernel is loaded EVK resets after SD card insertion.</P><P>If SD card is initially inserted EVK works normal but reset occurs after ejection and insertion SD.</P><P>Google can't help.</P><P>Any Ideas, any assumptions are welcome...</P><P>B.R.</P></BODY></HTML> Thu, 30 Aug 2012 09:47:00 GMT AlekseyP_ 2012-08-30T09:47:00Z Very strange bug https://community.nxp.com/t5/i-MX-Processors/Very-strange-bug/m-p/184590#M8429 <HTML><HEAD></HEAD><BODY><P>Hi All,</P><P>I try to work with imx28evk. I use kernel and rootfs from EVK. Loading kernel via tftp, connecting to rootfs via nfs. And if kernel is loaded EVK resets after SD card insertion.</P><P>If SD card is initially inserted EVK works normal but reset occurs after ejection and insertion SD.</P><P>Google can't help.</P><P>Any Ideas, any assumptions are welcome...</P><P>B.R.</P></BODY></HTML> Thu, 30 Aug 2012 09:47:00 GMT https://community.nxp.com/t5/i-MX-Processors/Very-strange-bug/m-p/184590#M8429 AlekseyP_ 2012-08-30T09:47:00Z Re: Very strange bug https://community.nxp.com/t5/i-MX-Processors/Very-strange-bug/m-p/184591#M8430 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>I have never seen this kind of situation, but I can suggest you to start debugging from CARD DETECT routine.</P><P></P><P>In linux kernel linux-2.6.35.3 CARD DETECT is done polling host controller, if you have the possibility to recompile kernel source you can try to bypass this check, to see when reset happens (file drivers/mmc/host/mxs-mmc.c) .</P><P>Maybe problems can be generated from&nbsp; power pin of MMC (file arch/arm/mach-mx28/device.c)</P><P>Do you see board reset also at u-boot level, if you insert SD in that moment ?</P><P>Giuseppe</P></BODY></HTML> Thu, 30 Aug 2012 10:32:20 GMT https://community.nxp.com/t5/i-MX-Processors/Very-strange-bug/m-p/184591#M8430 GiuseppePagano 2012-08-30T10:32:20Z