Thank you Andy! I tried with omap2plus_defconfig and the kernel seemed to be working, no more "hub 1-1:1.0: hub_port_status failed (err = -71)" so far. But I still don't understand why the config file copied from the /boot directory of a 13.07 linaro-ubuntu-pandaboard image doesn't work. I thought this was what linaro group used to compile the kernel. Could you explain a little more?
Another problem is the ethernet is still not working. Here is what I tried to debug this problem: 1. 'ifup eth0' replies 'Error getting hardware address for "eth0": No such device'. 2. 'dmesg| grep eth' shows only this: usbcore: registered new interface driver cdc_ether. But on the stock linaro image, it shows a lot more: [ 2.447448] usbcore: registered new interface driver cdc_ether [ 4.287170] smsc95xx 1-1.1:1.0: eth0: register 'smsc95xx' at usb-ehci-omap.0-1.1, smsc95xx U SB 2.0 Ethernet, 0e:60:7e:2a:4e:01 [ 21.024139] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 22.556945] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 22.557800] smsc95xx 1-1.1:1.0: eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1 [ 32.933746] eth0: no IPv6 3. Since smsc95xx is the eth driver, so I tried dmesg|grep 'smsc95xx', it shows: [ 1.830596] usbcore: registered new interface driver smsc95xx 4. I suspect it's still a usb problem, because 'lsusb' gives me 'unable to initialize libusb: -99". Could someone give me some suggestions? Thanks again. On Sun, Sep 29, 2013 at 7:21 PM, Andy Green <andy.gr...@linaro.org> wrote: > > On 30 September 2013 02:54, Chao Xu <caesarxuc...@gmail.com> wrote: > > Hi, > > > > I tried to build linaro kernel for pandaboard. I have tried everything what > > I can think of but the kernel still can't boot correctly. Any help will be > > appreciated. Here is what I did: > > 1. I flash the 13.07 linaro-ubuntu-pandaboard image into the sd card > > (http://releases.linaro.org/13.07/ubuntu/panda). This image works fine. > > 2. I clone the kernel source code from > > git://git.linaro.org/kernel/linux-linaro-stable.git. > > 3. checkout the lsk 13.07 tag. > > 4. copy the config file from original image (i.e. > > /boot/config-3.10.1.0-1-linaro-omap). > > This can be trouble... if new, required config options that the kernel > was tested with are somehow not on by default, you'll be missing them > this way. > > Better to look at omap2plus_defconfig (make ARCH=arm > omap2plus_defconfig ) from the new kernel, that's what people were > actually using. > > > 5. make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- CFLAGS="-O" > > LOADADDR=0x80008000 uImage > > The cross compiler on my machine is gcc-4.7-arm-linux-gnueabihf-base > > 6. From pandaboard, I load the built uImage via scp. > > > > The problem I met: > > 1. In most cases, the kernel can't boot correctly. And the terminal keeps > > printing "hub 1-1:1.0: hub_port_status failed (err = -71)". > > The hub error doesn't sound too terrible but "can't boot correctly" > might not be good. > > Because of the way TI did things there are dependencies in their boot. > Originally you had to worry about the right X-loader (MLO) with a > compatible version of U-Boot which did the things that the particular > version of the kernel you had wanted. Later they put X-loader into > U-Boot tree, so those at least should be updated together, but the > kernel still relies on the detail of what it expects to inherit from > U-Boot in terms of PM actions (state of IP unit power) and other > things. Ie, maybe update your U-Boot. > > They can get rid of this kind of issue by banning all unnecessary init > from the bootloaders and forcing the kernel to assert whatever states > it needs, but that proved impossible to coordinate / agree, although > they made big strides with the kernel owning clocks properly at least. > > > 2.Sometime, the kernel can finish booting. But the terminal prints for > > several times the aforementioned error message after booting. Plus, I don't > > have any module running, 'lsmod' shows nothing. > > Well for the modules you need to copy them over to your rootfs. I > usually do something like this > > make ARCH=arm INSTALL_MOD_STRIP=1 modules_install INSTALL_MOD_PATH=`pwd`/staging > > then cp -rp or scp or rsync or whatever ./staging/* to / on the remote > rootfs (it has /lib/modules/... in there). > > -Andy > > > Please help! Thank you. > > > > -- > > Regards, > > Chao Xu > > > > _______________________________________________ > > linaro-dev mailing list > > linaro-dev@lists.linaro.org > > http://lists.linaro.org/mailman/listinfo/linaro-dev > > -- Regards, Chao Xu
_______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
