[Xperia Z3 Compact Q&A, Help & Troubleshooting] DBCJoey:
Working

Hi this is my first post, infact I joined so I could report my findings.

I would just like to confirm so far that V5 working on my Z3C using the .93 firmware. I didn't need to wipe cache/dalvik/data partitions either.

For purposes of settings configuration, I'll be using TricksterMod

For stress testing purposes I'll be using Stability Test 2.7

Overclocking

Overclocking seems to work, I'll stress test and report back with the results.

I was wrong, it is unstable when overclocking and stress testing, with the phone force rebooting 1-5 seconds in to the stability test which loaded all 4 cores. Tried 2899Mhz and 2880Mhz (were both unstable and didn't try 2.72, 2.75, 2.57 either - I might try stability testing them.) Was completely stable at 2.47GHz, and it actually stuck there, no throttling in place! I stopped the stress test when the CPU temp was around 77-80C as my hand was getting burnt! The battery temp reached about 46C. It took 10 mins of stress testing for this to be reached. When the stock kernel was in place it would begin throttling after about 1-20 seconds under full load. First 2.2GHz, then 2 then 1.7 then 1.5 and eventually 1.25 after about 2-4mins.

I couldn't do a single core test though. I suspect as most games use single core or dual cores it wouldn't get overly hot.

My opinion is that fast clocked phones should be marketed with 2 speeds. The highest it'll reach under a boost mode (turbo for Intel's i5 and i7 series), and a slower speed that it'll average out at under thermal pressure. The Z3Cs would be turbo: 2.5GHz and normal: 1.5GHz.

Governors

These are quick tests I'm performing here to provide a quick look at responsiveness and potential unnecessary CPU jump ups.

Wheatley - most of the time it's hovering at top speed when approx CPU usage is 9%, it'll occasionally hunt down to 300Mhz but then right back up to 2899MHz. This one is speedy though. Governor tunables available.

Lagfree - idles at 300MHz - 960MHz then hunts up to 2.2-2.9Ghz when needed and turns on the second core. It seems to slow back down to idle. This one seems to have fast scrolling, sliding notifications pane quickly). No governor tunables.

SmartassV2 - idles at 300Mhz, speeds up to 422-960 on core 0, and turns on core 1 at 1.2-1.5GHz for a few seconds under fast scrolling and notification pane opening. Seems quite responsive. Probably good for battery life hopefully with the responsiveness of Interactive. No governor tunables.

Lionheart - Idles at 960 MHz for a few seconds then slows down to 300MHz with the odd increase to 729MHz. Core 0 and Core 1 reaches 1.26GHz under scrolling, notification pane opening. As fast as the others. Governor tunables available.

Hotplugging

Intelliplug appears to work better than MP-Decision - now only one core is on during idle, instead of 2.

MP-Decision was disabled to avoid conflicts.

Undervolting

I've only undervolted 300MHz to 675MHz from 775MHz as of writing this post.

Tried quickly undervolting in trickstermod by setting them all about -75mV, stability tested it, appears stable. I'll tweak the voltages a bit better when I do a scaling stability test.

Issues I've experienced

Sound Control is the only thing so far that causes a reboot. However music still plays over the speakers and headphones. Equaliser works too.

Upon rebooting, the CPU top speed will set itself to 2.2GHz, despite being set higher and saved at a higher speed in Trickstermod. Certainly trivial though.

Strange thing I've noticed: On the undervolt part I've noticed that there is a freq called 3033MHz, but no 2899MHz freq. Just an observation.

Misc

Force Fast Charge confirmed working! Before flashing new kernel charge went up 5% in about half an hour. It's now up another 5% in a matter of 5-10mins. This is when plugged to my PC.

Vibrator strength - set to 20 from 31, much quieter on table and can still feel it.

I'd like to say a huge thank you to DooMLoRD and AndroPlus for developing this stable kernel. Now my Z3C is worth the £28 a month I'm paying for again. Since this silly lad decided to bork the camera, Bravia functionality etc by rooting it on the first day. I'll report back and edit the post with my findings.