Originally Posted by mrfree2ita
I upgraded my p1000 from cm10.2 to cm11 few weeks ago but the latest cm11 seems to be a bit laggish on my device and I'd like to go back to cm10.2, first of all... is it possible? If so, which is the proper way to do it?
I'd recommend you try OmniROM
Its what I'm using on my "P1" and although it has its share of problems. Wired Headsets don't seem to be working. Its no more worse then CM10 was, and on that note why CM10.2 which like CM10.1 was broken beyond use? The only decent CM10 was CM10 from 2013 - 02 - 03. Which AFAIK was the last fully working CM10 Mod for the P1000. As the 10.1 and .2 had the Camera Bugs.
In any case Omni is pretty well supported with near nightly, or at the lest every other night updates. As long as you don't get crazy with it with Live Wallpapers, like my Old man was trying to run on it. (He too has a P1000), its pretty damned responsive. But. Again you ONLY have 512MB of RAM on the P1000. In some rear cases even less then this!
In my Fathers case the same sh-- that was causing his CM11 to lag like heck, was the same crap that was making the fresh install of his CM10 (version as dated above!), lag just as bad. So you might want to first clean up such resource hungry Apps as you have first.
But, on the Latest OmniROM for the P1 (Int't GSM version), as of 06.08.14 (Which is still the the most current at the time I wrote this), just running the Google Now Launcher, and a few widgets. The Tablet doesn't feel any considerably slower then it did back in CM10, and the Google Now Launcher is a KEEPER! I can't imagine wanting to roll back to CM10.
P.s. Did you remember to reset your Firmware + wiping the Cache Partition, and Dalvik Cache? This could also partially explain your problems. If you, had not done this.
P.p.s. Download your ROM, and appropriate GAPPs Package, then reboot your P1000 by pressing both the Volume Up, and Power Button till you see the Galaxy Tab / Samsung Bootloader Screen. Then release the Power Button, while continuint to hold the Volume Up till you fully enter the Recovery Mode.
Once in the Recovery Mode do the following Factory Reset, then Wipe Cache Partition and the Dalvik Cache (Advanced Settings). Then install your CM10.x ROM from where you stored it i.e. the /Download Folder? And when thats though. Your GAPPs Package as well. After which you then boot into your new ROM. Which might take a few moments longer, on the first boot as the Database(s)? have to built from scratch again.