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Add a piece of thin plastic between case and nubs, et voila, smooth moving nubs. Or at least a lot smoother. To improve further, apply rubber circles for ring enlargement, and happy gaming

The friction persists even if i remove a nub with PCB from a case and it's on the same level as Gamepad2 so if you haven't used really good nubs like on pandora it must feel good enough for you.

I got a device yesterday (courtesy of GPD, thanks guys). And I want to comment several aspects that I have noticed.

- Device is pretty similar to q89. Performance in emulators is pretty much the same, except for a couple of things. Some PSP games run better and Broglia's emus can be used with hq2x filter without issues, something that was not possible with RK3188.
- Performance in GPU is very good, a bit worse than my phone but fast enough to run games without issues.

Now, in terms of firmwares, I want to clear some points. I have tested 1.07 firmware, and although kernel is set up to 1,8 ghz, the true speed as I thought is 1,6 ghz. That is normal in RK3288, so no a big deal. However, that changes in firmware 1.1.2, which was the one installed in my device. In 1.1.2 CPU max speed is marked as 1,6 ghz, but indeed max speed is 1,416, so device is underclocked. My guess is that GPD did that to avoid some heat and probably because the board have some issues running at max voltage during some time, probably due to the lack a good heatsink (or no heatsink at all).
Apart from that, firmware is very stable and no problems so far. Even at 1,416 ghz everything I tried in terms of emulation runs ok, and honestly even at 1,8 ghz wouldn't make a big difference except for a better antutu benchmarks from my experience with my RK3288 tv box.

But in the end, my point is that there is no single firmware in which the system runs at "true" 1,8 ghz speed, not even the 1.07 one.

Well, the iplay is much more expensive, so it's normal it's better I guess. Though for an "emulator" guy like me, a 56 hz screen is clearly a big fail.

I still prefer my combo of my phone plus Moga controller in any case. 7 inch devices are too uncomfortable for me.

Yes, it's rooted

Quote from: skelton on May 16, 2015, 03:24:08 pm

Yes, it's rooted

Does this GPD Q9 performance is better then JXD S7800B?

Yes, it's a RK3288 which is a better CPU than the RK3188 of 7800

For emulators are pretty much the same, for android games is better the q9 because ir performs better in games.

Analog in both are pretty bad, slightly better in 7800 but far from good in my opinion.

It's up to you. For android games the mali400 of the 7800 is pretty old, so don't expect to run future titles at good speed. 7800 is also abandonned in terms of firmware support.

I personally prefer q9 because if their dpad, but I mostly play emulators, I never play android games.

Some more digging I have made these days. I got access to latest RK3288 SDK. My suspects were certain, device in latest firmwares is limited to 1,4 ghz (it marks 1,6 ghz but that frequency is never used). DDR Speed is 400 mhz and GPU is 500 mhz. Talking with a GPD engineer they tell me the main reason is the heat. Device has not a good heatsink, so the "workaround" they made to avoid is basically to underclock the device, because some devices can suffer some instability even at 1,6 ghz. Even the system reaches a certain temperature, device speed is automatically lowered. I guess this what happened with nielo360 when he got his device. He suffered some CPU throttling due to temp.

I personally have tested kernel at 1,6 ghz and run without problems in my device. However, true 1,8 ghz is practically impossible to handle in this device. Device is not stable in my testings because I have to increase voltage to 1.4V to make it stable, but means device temp go high very soon and CPU Throttling and crashes are frequent. So I am afraid that 1,6 ghz is the max for this device. And probably the reason why Rockchip limits CPU to 1,6 in tablets. In tvboxes is different because of good heatsinks, but in a tablel 1,8 ghz is impossible to reach it.

With that said, I am using my device with the 1,4 ghz limitation and for me it's fine.  Emus run good and the Android games that I have tried run without issues, so probably that speed is enough.

I hope this wont be repeated in upcoming gpd devices, it sort of defeats the purpose of a new soc. Granted they are pricing these things very competitively the challenge would be getting the right balance. Thank you for the research into this I shall pin it up top.

Quote from: skelton on May 20, 2015, 09:34:57 am

Some more digging I have made these days. I got access to latest RK3288 SDK. My suspects were certain, device in latest firmwares is limited to 1,4 ghz (it marks 1,6 ghz but that frequency is never used). DDR Speed is 400 mhz and GPU is 500 mhz. Talking with a GPD engineer they tell me the main reason is the heat. Device has not a good heatsink, so the "workaround" they made to avoid is basically to underclock the device, because some devices can suffer some instability even at 1,6 ghz. Even the system reaches a certain temperature, device speed is automatically lowered. I guess this what happened with nielo360 when he got his device. He suffered some CPU throttling due to temp.

I personally have tested kernel at 1,6 ghz and run without problems in my device. However, true 1,8 ghz is practically impossible to handle in this device. Device is not stable in my testings because I have to increase voltage to 1.4V to make it stable, but means device temp go high very soon and CPU Throttling and crashes are frequent. So I am afraid that 1,6 ghz is the max for this device. And probably the reason why Rockchip limits CPU to 1,6 in tablets. In tvboxes is different because of good heatsinks, but in a tablel 1,8 ghz is impossible to reach it.

With that said, I am using my device with the 1,4 ghz limitation and for me it's fine.  Emus run good and the Android games that I have tried run without issues, so probably that speed is enough.

I hope this wont be repeated in upcoming gpd devices, it sort of defeats the purpose of a new soc. Granted they are pricing these things very competitively the challenge would be getting the right balance. Thank you for the research into this I shall pin it up top.

It doesn't defeat the purpose if gpu-intensive games still run at three or more times higher fps... And three times higher is very essimistic it's usually more between mali t764 and ancient mali400...