[Nexus 6 Q&A, Help & Troubleshooting] php111:
My phone constantly keeps freezing.

I tried doing a power off than on but does not fix the issue.

I tried a hard reset by power + volume down but does not fix the issue.

I tried doing a factory reset and setting up the phone as new but does not fix the issue.

I tried manually flashing factory image of the latest but does not fix the issue.

This is my Nexus 6. I have the same issue with my Nexus 7 tablet as well. Here is aLogcat.

--------- beginning of main

03-12 09:36:03.598 W/System (25351): ClassLoader referenced unknown path: /data/app/com.nolanlawson.logcat-1/lib/arm

03-12 09:36:04.241 W/m (25351): Cannot obtain root

03-12 09:36:04.241 W/m (25351): java.io.IOException: Cannot run program "su": error=13, Permission denied

03-12 09:36:04.241 W/m (25351):	at java.lang.ProcessBuilder.start(ProcessBuilder.java:983)

03-12 09:36:04.241 W/m (25351):	at java.lang.Runtime.exec(Runtime.java:691)

03-12 09:36:04.241 W/m (25351):	at java.lang.Runtime.exec(Runtime.java:524)

03-12 09:36:04.241 W/m (25351):	at java.lang.Runtime.exec(Runtime.java:421)

03-12 09:36:04.241 W/m (25351):	at com.nolanlawson.logcat.b.m.a(Unknown Source)

03-12 09:36:04.241 W/m (25351):	at com.nolanlawson.logcat.b.w.a(Unknown Source)

03-12 09:36:04.241 W/m (25351):	at com.nolanlawson.logcat.b.p.b(Unknown Source)

03-12 09:36:04.241 W/m (25351):	at com.nolanlawson.logcat.d.doInBackground(Unknown Source)

03-12 09:36:04.241 W/m (25351):	at android.os.AsyncTask$2.call(AsyncTask.java:305)

03-12 09:36:04.241 W/m (25351):	at java.util.concurrent.FutureTask.run(FutureTask.java:237)

03-12 09:36:04.241 W/m (25351):	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)

03-12 09:36:04.241 W/m (25351):	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)

03-12 09:36:04.241 W/m (25351):	at java.lang.Thread.run(Thread.java:761)

03-12 09:36:04.241 W/m (25351): Caused by: java.io.IOException: error=13, Permission denied

03-12 09:36:04.241 W/m (25351):	at java.lang.UNIXProcess.forkAndExec(Native Method)

03-12 09:36:04.241 W/m (25351):	at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)

03-12 09:36:04.241 W/m (25351):	at java.lang.ProcessImpl.start(ProcessImpl.java:128)

03-12 09:36:04.241 W/m (25351):	at java.lang.ProcessBuilder.start(ProcessBuilder.java:964)

03-12 09:36:04.241 W/m (25351):	... 12 more

03-12 09:36:18.304 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:38:15.269 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:38:40.747 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:38:58.363 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:39:02.647 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:39:30.938 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:39:38.763 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:39:49.795 W/InputEventReceiver(25351): Attempted to finish an input event but the input event receiver has already been disposed.

03-12 09:40:00.485 W/IInputConnectionWrapper(25351): finishComposingText on inactive InputConnection

03-12 09:40:09.105 W/m (25351): Cannot obtain root

03-12 09:40:09.105 W/m (25351): java.io.IOException: Cannot run program "su": error=13, Permission denied

03-12 09:40:09.105 W/m (25351):	at java.lang.ProcessBuilder.start(ProcessBuilder.java:983)

03-12 09:40:09.105 W/m (25351):	at java.lang.Runtime.exec(Runtime.java:691)

03-12 09:40:09.105 W/m (25351):	at java.lang.Runtime.exec(Runtime.java:524)

03-12 09:40:09.105 W/m (25351):	at java.lang.Runtime.exec(Runtime.java:421)

03-12 09:40:09.105 W/m (25351):	at com.nolanlawson.logcat.b.m.a(Unknown Source)

03-12 09:40:09.105 W/m (25351):	at com.nolanlawson.logcat.b.w.a(Unknown Source)

03-12 09:40:09.105 W/m (25351):	at com.nolanlawson.logcat.b.p.b(Unknown Source)

03-12 09:40:09.105 W/m (25351):	at com.nolanlawson.logcat.d.doInBackground(Unknown Source)

03-12 09:40:09.105 W/m (25351):	at android.os.AsyncTask$2.call(AsyncTask.java:305)

03-12 09:40:09.105 W/m (25351):	at java.util.concurrent.FutureTask.run(FutureTask.java:237)

03-12 09:40:09.105 W/m (25351):	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)

03-12 09:40:09.105 W/m (25351):	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)

03-12 09:40:09.105 W/m (25351):	at java.lang.Thread.run(Thread.java:761)

03-12 09:40:09.105 W/m (25351): Caused by: java.io.IOException: error=13, Permission denied

03-12 09:40:09.105 W/m (25351):	at java.lang.UNIXProcess.forkAndExec(Native Method)

03-12 09:40:09.105 W/m (25351):	at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)

03-12 09:40:09.105 W/m (25351):	at java.lang.ProcessImpl.start(ProcessImpl.java:128)

03-12 09:40:09.105 W/m (25351):	at java.lang.ProcessBuilder.start(ProcessBuilder.java:964)

03-12 09:40:09.105 W/m (25351):	... 12 more

03-12 09:40:09.116 I/art (25351): Background partial concurrent mark sweep GC freed 3806(242KB) AllocSpace objects, 51(23MB) LOS objects, 40% free, 11MB/19MB, paused 9.097ms total 35.479ms

03-12 09:49:10.989 I/art (25351): Background partial concurrent mark sweep GC freed 692(29KB) AllocSpace objects, 0(0B) LOS objects, 40% free, 20MB/33MB, paused 8.796ms total 91.628ms

And:

build.board: shamu

build.bootloader: moto-apq8084-72.01

build.brand: google

build.cpu_abi: armeabi-v7a

build.cpu_abi2: armeabi

build.device: shamu

build.display: N6F26U

build.fingerprint: google/shamu/shamu:7.1.1/N6F26U/3687496:user/release-keys

build.hardware: shamu

build.host: kpfi11.cbf.corp.google.com

build.id: N6F26U

build.manufacturer: motorola

build.model: Nexus 6

build.product: shamu

build.radio: unknown

build.serial: ZX1G22RH9M

build.tags: release-keys

build.time: 1485823876000

build.type: user

build.user: android-build

version.codename: REL

version.incremental: 3687496

version.release: 7.1.1

version.sdk_int: 25