C-state fix

[Haxk20]

Hi i was having the C-state issue all the time even the fix on this repository dont help but until i find this page: https://forum.manjaro.org/t/intel-bay-trail-freezes-the-linux-kernel/1931/3 and you need the script: Disable all C6 states enable all C7 core states for Baytrail CPUs from this site: https://bugzilla.kernel.org/show_bug.cgi?id=109051 and after making the script service its working without making the tablet warm like if it was in oven and battery life is even better. IMPORTANT: you need to remove the "intel_idle.max_cstate=1" from kernel parameter and even if you have anything else in kernel parameter what is connected with C-states and modifing them in some way you need to remove this too otherwise it will not work. VERY BIG THANKS TO: Wolfgang M. Reimer for creating this script.

[Tuxman2]

Hi,

@Haxk20: Do you think we can use your tip for Atom Z3735F processor, or is there a risk ? I don't see the Z3735F processor in the list.

Thanks.

[Haxk20]

Its not in the list but its working totally awesome i have the Z3735F too and no freeze for 2 months

[Tuxman2]

4.9.x kernel seems to correct the c-state problem but 4.9.x have some regressions. Do we still need the intel_pstate=disabled option ?

[Haxk20]

4.9 didnt fix it for me at all it make it to stay alive longer time but froze too and dont know about the pstates in 4.9 but with this script you dont need it with this script you dont need any modification to cstates or pstates its fix them but its need to the script needs to run to work so make it to start at boot and no kernel parameter for cstates and pstates and you will not have any freeze

[Tuxman2]

It seems that someone create a patch to avoid using the script that you tell.

See it: https://bugzilla.kernel.org/show_bug.cgi?id=109051#c609 and it: https://bugzilla.kernel.org/show_bug.cgi?id=109051#c610

[Haxk20]

Yes but I prefer script because i dont compile kernel too often because arch is rolling distro so update will update kernel too so then i need to compile it again for the new kernel so i prefer script

[nicman23]

@Haxk20 do you know the magic that is ccache?

[Haxk20]

Wow didnt know about ccache its cool how much time it can save ?

[nicman23]

depends on the hdd / sdd . mine is about a third(?) but i have not really timed it.

[Haxk20]

Wow thats awesome can i compile kernel from Rpi with arch linux for my tablet running arch too ?

[Haxk20]

Rpi is ARM and tablet is x86_64 (like normal 64 bit desktop PC) is possible to compile from arm to x86_64 ?

[nicman23]

You first ask yourself if you want 2 days to wait around for the compiler to finish

[Haxk20]

Yeah well thats right rpi is slow well i think i will make some free space in my arch desktop how much free space do i need ?

[nicman23]

About 8g

[Haxk20]

But i mean even with source ? Or u already count source files to it ?

[Haxk20]

And even 1 little question i use wifi usb adapter because on ubuntu rtl8723bs make the tablet to freeze (it was not cstate issue) is rtl8723bs freezing on Arch too ?

[nicman23]

Yes, the driver is not stable -for me anyways

[Haxk20]

Is there some patch for the wifi or i need to use usb adapter

[nicman23]

not yet

[beevabeeva]

Have you tried Linuxium's images/patches? (They're all Deb based so not the way to go if you're dead set on Arch but maybe a good place to start?)

Check http://www.linuxium.com.au/how-tos to see what Ian Morrison did and/or get the ready-to-boot images.

With his Lubuntu image, wifi works OTB (Nextbook 10.1 - not flexx- Z3735G processor with RTL8723BS and BTrail chipset...not sure the differences with the flexx ). Other images should work the same.

Video is buggy OTB (for me). Playing with C-state and swappiness seemed to improve it. Still not as good as stock on Windows (just to give a benchmark...).

Reboot and shutdown hangs, have to hard shutdown with power button for now.

Sound does not work. Tried Ian's solution as he described - to no avail. Have not had time to look into it further.

Battery indicator shows full all the time.

Screen brightness not working(have not tried the fixes discussed here).

Keyboard works.

Bluetooth - can't detect anything or be detected so it's not working (for me anyway). Have not looked into it yet.

Rotation and multitouch don't work but there is another image: http://xjesus.net/xjubuntu/xjubuntab-tablet-customizedcustomizable-distro-based-on-xubuntu-14-04-64-bits/ Although on this one, the wifi hasn't been patched. Don't think anything else works.

Sorry in advance, this is probably not the right place to put this: Thanks to burzumishi and everyone here contributing to this project. It's really cool to watch open source development in motion, with such talent. Still doing CS/math degree and learning kernel but hopefully will be able to start contributing here soon.

PS - not asking for help in this message just sharing what I've done in case it is of any benefit to anyone.

On 25 Dec 2016, at 1:01 PM, Haxk20 notifications@github.com wrote:

Is there some patch for the wifi or i need to use usb adapter

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[youling257]

intel_idle.max_cstate=1 ，c6off-c7on.sh no use .

x86:/ $ su x86:/ # sush /storage/A4AE40E7AE40B398/ADM/cstateInfo.sh cpu0 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 165188 541 1 C1-BYT 0 1 1 66937082 167920 cpu1 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 132716 263 1 C1-BYT 0 1 1 72517489 80255 cpu2 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 127568 172 1 C1-BYT 0 1 1 72318482 68787 cpu3 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 112984 166 1 C1-BYT 0 1 1 74612115 77764 x86:/ #

intel_idle.max_cstate=2，c6off-c7on.sh just for C6N-BYT

x86:/ $ su x86:/ # sush /storage/A4AE40E7AE40B398/ADM/cstateInfo.sh cpu0 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 209967 372 1 C1-BYT 0 1 1 119676918 244533 2 C6N-BYT 1 300 275 9892356 8022 cpu1 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 172986 345 1 C1-BYT 0 1 1 126686914 114641 2 C6N-BYT 1 300 275 10381405 5841 cpu2 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 211053 317 1 C1-BYT 0 1 1 124165824 103528 2 C6N-BYT 1 300 275 9802324 2413 cpu3 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 229982 277 1 C1-BYT 0 1 1 126706192 117251 2 C6N-BYT 1 300 275 11696947 3066 x86:/ #

if no idle kernel parameter or intel_idle.max_cstate=5 ，C7S-BYT 0 , C7-BYT 0 , C6N-BYT 1, C6S-BYT 1 ，may be half hours freeze ，may be three hours .

x86:/ # sush /storage/A4AE40E7AE40B398/ADM/cstateInfo.sh cpu0 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 610677 1545 1 C1-BYT 0 1 1 181844426 571983 2 C6N-BYT 1 300 275 24063544 32677 3 C6S-BYT 1 500 560 47734813 34678 4 C7-BYT 0 1200 4000 66133563 10427 5 C7S-BYT 0 10000 20000 4557726 231 cpu1 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 195534 531 1 C1-BYT 0 1 1 170836899 273144 2 C6N-BYT 1 300 275 24384851 29901 3 C6S-BYT 1 500 560 56203277 37836 4 C7-BYT 0 1200 4000 93652346 12286 5 C7S-BYT 0 10000 20000 6990935 205 cpu2 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 120383 252 1 C1-BYT 0 1 1 137556159 187327 2 C6N-BYT 1 300 275 21867180 25222 3 C6S-BYT 1 500 560 63495377 34976 4 C7-BYT 0 1200 4000 114469935 13532 5 C7S-BYT 0 10000 20000 2748372 171 cpu3 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 107908 336 1 C1-BYT 0 1 1 132216361 176492 2 C6N-BYT 1 300 275 17063854 19397 3 C6S-BYT 1 500 560 53141804 28168 4 C7-BYT 0 1200 4000 119973168 13056 5 C7S-BYT 0 10000 20000 3847940 217 x86:/ #

i use this test 7 days .

x86:/ # sush /storage/A4AE40E7AE40B398/ADM/cstateInfo.sh cpu0 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 1420515 1777 1 C1 0 1 2 186759809 507906 2 C2 0 500 1000 39153453 24109 3 C3 1 1000 2000 131755099 27722 cpu1 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 811543 1166 1 C1 0 1 2 172234825 213225 2 C2 0 500 1000 31799103 16785 3 C3 1 1000 2000 157782399 24560 cpu2 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 706279 1088 1 C1 0 1 2 131549650 228080 2 C2 0 500 1000 33676014 19324 3 C3 1 1000 2000 197335320 26320 cpu3 State Name Disabled Latency Residency Time Usage 0 POLL 0 0 0 691323 864 1 C1 0 1 2 131102325 199693 2 C2 0 500 1000 35843545 19297 3 C3 1 1000 2000 196267075 25884 x86:/ #

First start kernel with: intel_idle.max_cstate=0 Then give these commands as root:

echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo echo 1 > /sys/devices/system/cpu/cpu0/cpuidle/state3/disable echo 1 > /sys/devices/system/cpu/cpu1/cpuidle/state3/disable echo 1 > /sys/devices/system/cpu/cpu2/cpuidle/state3/disable echo 1 > /sys/devices/system/cpu/cpu3/cpuidle/state3/disable

i use cpu performance by android app .

[Haxk20]

well i compiled the kernel today BT is working with the rtl8723bs_bt driver volume buttons are working with patches still no battery indicator but i dont applied the patches for it and why u use those ugly kernel parameters when u have this script and even guy created a patch in the forum above in my post sound is still not working but i will apply the new firmware UCM files and asound then i hope it will work clocksource jiffies is happy now with that configuration and its running ok will test tsc too will post here what it does

[Haxk20]

Tsc still have problems but i read on forum that it cannot find the right frequency for the processor then it will start to do crazy things

[Haxk20]

Can somebody add this fix to README on this repo this can help a lot of people.