All my stratum and not pools
(mine-pool.net/qubit/, cpu-pool.net/qubit/, qubit.mine-pool.net/),
work correct with GPU and CPU miners,
all rejected shares is problem of GPU miner.
worker banning disabled.
Before, the diff raised to 8 and it seems ok. Now, all share (or 99.9%) are rejected and the diff never goes higher than 1. I guess something is wrong.
Just check how many block the pool find now and compare to how many blocs were found before your change.
Your pool used to find ~600/700 blocs a day. Now, for the last 24h, 293 at the moment i wrote this. AND you change the wardiff 14hours ago..
I think your pool will find 200 bloc/day against 700/day 2 days ago.
Same thing with your Dime pool
The main problem in miner, cpu miner send norrmal shares and no problems, but gpu miner send to many shares > target, and all of this shares is invalid.
and no one of this shares not make block.
about vardif yes i change it, max dif changed from 8 to 1 and it's looks like ok, but i try to decrease this value or increase. (for tests)
about count of blocks i try to find where is problem
upd: 90 % the problem is some gpu miners leave pool in qubit, in qubit diff in percent of blocks is 10-20% (24 h, 7 day), about dimecoin the percent of founded block is stable (24h, 7 day)
I found a lot blocks on your pools with my gpus.. (two days ago and the days before, i give up since you change your vardiff that make gpu mkaing only share above target)
I talk about DIME too, because it's the same gpu miner but a different algo and the same problems occurs since you change vardif.
about vardif yes i change it, max dif changed from 8 to 1 and it's looks like ok, but i try to decrease this value or increase. (for tests)
as i said, that was ok with vardiff at 8, but impossible to mine with gpu since vardiff at 1. In fact, i don't think it's the value of vardiff, because before, vardiff raised from 0.004 to 8, and no shares were lost/rejected. Now it's always 1 but all shares are rejected. So i guess it's something else. If i could help you find out what is it (i like your pools !), i will, but my knowledge is limited.
If you have to run tests on one of your pool, fell free to ask me (maybe not Q2C but maybe a less succeful coin pool, as dime i tested yesterday (seems to be a dead coin anyway, price is abyssal, dev disepeared etc..))