Is there a need to recomplie my linux kernel? -

-

i beginner learning linux kernel module development. following tutorial says recompile kernel enable various debugging features forced module unloading e.t.c. is okay if that? effects pre-built kernel. in cases forced insert module running kernel , kernel won't allow me so?

it okay compile , install kernel kernel module development. if in ubuntu, can follow following steps make sure using same kernel sources booted machine.

step 1. find out linux being used in booting /boot/grub/grub.cfg file. entry agains 'linux ' in boot option entries select while booting up. example excerpt : linux /boot/vmlinuz-3.13.0-24-generic root=uuid=e377a464-92db-4c07-86a9-b151800630c0 ro quiet splash $vt_handoff

step 2. name of package same version using following command.

dpkg -l | grep linux | grep 3.13.0-24-generic

example output:

$ dpkg -l | grep linux | grep 3.13.0-24-generic     ii  linux-headers-3.13.0-24-generic                       3.13.0-24.46                                                amd64        linux kernel headers version 3.13.0 on 64 bit x86 smp     ii  linux-image-3.13.0-24-generic                         3.13.0-24.46                                        amd64        linux kernel image version 3.13.0 on 64 bit x86 smp     ii  linux-image-extra-3.13.0-24-generic                   3.13.0-24.46                                        amd64        linux kernel modules version 3.13.0 on 64 bit x86 smp

step 3. download sources of package "linux-headers-3.13.0-24-generic" same kernel used in pc.

$ apt-get source linux-headers-3.13.0-24-generic

step 4. use config file available @ /boot/ folder config file compile kernel source

example : $ ls /boot/config-3.13.0-24-generic (notice same version used in file)

step 5. turn on debugging symbols on config testing.


Comments

Post a Comment

Popular posts from this blog

java - Plugin org.apache.maven.plugins:maven-install-plugin:2.4 or one of its dependencies could not be resolved -

-
i getting error message , further 1 here: failed read artifact descriptor org.apache.maven.plugins:maven-install-plugin:jar:2.4: even though when go .m2 repository path c:\users\a591024.m2\repository\org\apache\maven\plugins\maven-resources-plugin\2.4 the maven-resources-plugin-2.4.jar file there , maven-resources-plugin-2.4.pom there. have tried delete .m2 repository no luck. far maven not build project desperately need to. any ideas? it seems proxy issue please aad following in setting.xml grabbing lan setting , proxy information. <proxies> <proxy> <id>proxy</id> <active>true</active> <protocol>http</protocol> <host>hostname</host> <port>port</port> </proxy> </proxies> this frequent issue, please see below link well. plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or 1 of dependencies not resolved maven: failed ret...
Read more

Round ImageView Android -

-
Image
i working on android application in doing rounded image view. working fine images, images 160x120 resolution shows oval shaped. code custom imageview given below, please me out here: public class roundimage extends drawable { private final bitmap mbitmap; private final paint mpaint; private final rectf mrectf; private final int mbitmapwidth; private final int mbitmapheight; public roundimage(bitmap bitmap) { mbitmap = bitmap; mrectf = new rectf(); mpaint = new paint(); mpaint.setantialias(true); mpaint.setdither(true); final bitmapshader shader = new bitmapshader(bitmap, shader.tilemode.clamp, shader.tilemode.clamp); mpaint.setshader(shader); mbitmapwidth = mbitmap.getwidth(); mbitmapheight = mbitmap.getheight(); } @override public void draw(canvas canvas) { canvas.drawoval(mrectf, mpaint); } @override protected void onboundschange(rect bound...
Read more

How can I utilize Yahoo Weather API in android -

-
Image
i want develop app using yahoo weather api android. want current , forecast weather details. i have tried different sources (e.g.: https://github.com/survivingwithandroid/weatherlib , getting error weatherlib api android , unable execute activity in android weatherlib ) , getting different errors m unable resplve. there can proper tutorial or guide! error: -17 08:50:48.961 3168-3168/com.survivingwithandroid.weather e/androidruntime﹕ fatal exception: main process: com.survivingwithandroid.weather, pid: 3168 java.lang.runtimeexception: unable start activity componentinfo{com.survivingwithandroid.weather/com.survivingwithandroid.weather.mainactivity}: java.lang.nullpointerexception: attempt invoke interface method 'boolean java.util.list.isempty()' on null object reference @ android.app.activitythread.performlaunchactivity(activitythread.java:2298) @ android.app.activitythread.handlelaunchactivity(activitythread.java:2360) @ android.app.activi...
Read more