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- | = | + | =Overclocking= |
- | This page is about overclocking | + | This page is about overclocking the N900. |
+ | For the N8x0 see [http://talk.maemo.org/showthread.php?t=12464 this] | ||
- | + | <nowiki>#</nowiki> ''WORK IN PROGRESS, HELP IF YOU WANT'' | |
- | + | Overclocking is discussed in [http://talk.maemo.org/showthread.php?t=39753 this thread]. | |
+ | Benchmark results can be found [http://talk.maemo.org/showthread.php?p=605189 here]. | ||
+ | If you're more interested in power saving read [http://talk.maemo.org/showthread.php?t=49654 this]. | ||
- | + | =Warnings= | |
- | + | - Overclocking WILL VOID YOUR WARRANTY<br> | |
- | + | - The lifetime of your device will get reduced<br> | |
- | + | - You could lose the data in your device (file system corruption)<br> | |
- | + | - Every device is an individual, what is stable for others might not be for you<br> | |
- | + | - If you encounter ANY unusual problems, lower your clock frequency<br> | |
- | + | - You do it at your own responsibility. No whining afterwards. If you're unsure, don't do it.<br> | |
- | + | - [http://depot.javispedro.com/nit/thewarningtm.jpeg Nokia's overclocking warning]: 500MHz is the normal frequency. Everything above is not good for your device, even with the stock kernel.<br> | |
- | + | - Igor Stoppa's [http://talk.maemo.org/showpost.php?p=596149&postcount=904 warning] and [http://talk.maemo.org/showpost.php?p=603833&postcount=66 comment] | |
+ | - [http://talk.maemo.org/showpost.php?p=596274&postcount=937 chip vendors specs] | ||
- | = | + | =Available kernels= |
- | + | Overclocking requires installation of a custom kernel. | |
- | + | There are two types of kernels: | |
- | + | # modified PR1.1 kernels by Lehto and others. The only difference to the stock Nokia kernel is that the change the available hardcoded frequencies. | |
- | + | # enhanced kernels by titan. They are compatible with PR1.2 (!) , contain lots of additional features (IPv6, NAT etc) and bugfixes. In addition they include a large set of possible frequencies (125MHz-1.2GHz) which you manually set an try out without flashing a new kernel. The defaults are set to the standard 250-600MHz range. The kernel can be installed via HAM from the extras-devel catalouge. | |
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- | == | + | == Installation of Lehto's PR1.1 kernels == |
- | + | [http://talk.maemo.org/showpost.php?p=594200&postcount=309 Lehto's Kernels] | |
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- | == | + | [http://talk.maemo.org/showpost.php?p=595582&postcount=774 talk.maemo.org: Jakiman's Overclock Guide / Summary] |
- | + | == Installation of titan's enhanced kernels == | |
- | + | This kernel makes it possible dynamically change the maximum frequency up to 1.15GHz (supported frequencies are 250,500,550,600,700,750,805,850,900,950,1000,1100,1150MHz). | |
- | + | WARNING: Overclocking may damage your device and is at your own risk! It may void your warranty and destroy your data. You have been warned. | |
- | + | You can manually increase the limit until your device fries using, e.g. for 600MHz | |
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- | = | + | [http://talk.maemo.org/showthread.php?t=43420 talk.maemo.org: Discussion of the enhanded kernel] |
- | + | ||
- | + | ||
- | === | + | Note: all commands on this page must be run as root in X Terminal (install rootsh package and enter "sudo gainroot") |
- | + | === Installation of the [https://maemo.org/packages/package_instance/view/fremantle_extras-testing_free_armel/kernel-power-flasher/2.6.28-maemo24/ kernel (maemo24)] from extras-testing === | |
- | + | With this kernel you can change the frequency limits, the voltages and DSP frequencies online. | |
+ | It requires firmware PR1.1 or newer. | ||
+ | # Install the package kernel-power-flasher (section system in HAM) and kernel-power-settings | ||
+ | # shutdown and boot again. There's no need for reflashing etc. | ||
+ | [http://talk.maemo.org/showpost.php?p=610967&postcount=2718 read this for more details]. | ||
- | The | + | The package was previously called kernel-power-flasher. |
+ | If you have problems upgrading also try [http://talk.maemo.org/showpost.php?p=608343&postcount=2603 deinstalling the old package]. | ||
+ | Make sure you reset /etc/pmconfig to the defaults: | ||
+ | # Power management configuration file | ||
+ | enable_off_mode 1 | ||
+ | sleep_while_idle 1 | ||
+ | sr_vdd1_autocomp 0 | ||
+ | sr_vdd2_autocomp 0 | ||
+ | clocks_off_while_idle 1 | ||
+ | voltage_off_while_idle 1 | ||
+ | scaling_governor ondemand | ||
+ | scaling_max_freq 600000 | ||
+ | scaling_min_freq 125000 | ||
+ | sleep_ind 1 | ||
- | + | === Deinstallation === | |
+ | sudo gainroot | ||
+ | apt-get install --reinstall kernel kernel-flasher | ||
+ | apt-get remove kernel-power kernel-power-modules | ||
- | === | + | === Temporarly change of the frequency limits === |
- | + | sudo gainroot | |
- | + | echo 250000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq | |
- | + | echo 599000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq | |
+ | cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq | ||
+ | cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq | ||
+ | The last line shows which values were actually set. | ||
+ | To set 125MHz use 124999, for 600MHz 599999, for everthing else x000 with x=MHz. | ||
+ | This setting takes effect immediately and is cleared with the next reboot. | ||
- | === | + | === Permanently change of the frequency limits === |
- | + | WARNING: Permanent overclocking is very dangerous! | |
- | == | + | Install kernel-power-settings and follow [http://talk.maemo.org/showpost.php?p=610967&postcount=2718 those instructions]. |
- | + | ||
- | + | === Battery === | |
- | + | In kernels version >=maemo20 you can read out the current battery info: | |
- | + | modprobe bq27x00_battery | |
- | + | cat /sys/class/power_supply/bq27200-0/current_now | |
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- | === | + | === Holding a kernel version === |
+ | It your manually installed kernel should be not upgraded to the one in extras* try [http://talk.maemo.org/showpost.php?p=603915&postcount=2063 this]: | ||
+ | echo kernel-power-flasher hold | dpkg --set-selections | ||
+ | echo kernel-power hold | dpkg --set-selections | ||
+ | echo kernel-power-modules hold | dpkg --set-selections | ||
+ | to unlock the version: | ||
+ | echo kernel-power-flasher install | dpkg --set-selections | ||
+ | echo kernel-power install | dpkg --set-selections | ||
+ | echo kernel-power-modules install | dpkg --set-selections | ||
- | + | === Remarks === | |
+ | # The screen calibration in settings crashes immediately. It is a known bug in the calibration app, not in the kernel. It's mentioned in the kernel package description and is due to additional evdev (joystick,mouse) support. Just calibrate once with the stock kernel before you install the fully featured kernel. | ||
+ | # [http://talk.maemo.org/showpost.php?p=597703&postcount=141 the 125MHz issue] | ||
+ | # Installing another version of the enhanced kernel will just overwrite the older version. The stock kernel modules are preserved so that you can simply reflash the stock kernel via USB. | ||
+ | # If you for some reason get errors like this during removal or installation "rm: cannot remove '/lib/modules/2.6.28.10maemo-lv-omap1/modules.*': No such file or directory".try this [http://talk.maemo.org/showpost.php?p=603938&postcount=196 workaround]. There was a bug in one of the early LV kernels but it should be fixed in more recent versions. | ||
+ | # This kernel will not conflict with the future PR1.2 upgrade. The upgrade will, however, overwrite this kernel and you'll have to install it again. | ||
- | + | =Additional information and hints= | |
- | in | + | # the frequencies available in the Nokia kernel are: 250, 500, 550 and 600MHz. |
+ | # Nokia [http://talk.maemo.org/showpost.php?p=601691&postcount=1823 locks the device to 600MHz] during phone calls. This may be a bug. It also [http://talk.maemo.org/showpost.php?p=600721&postcount=1720 affects] Lehto's kernels. | ||
+ | # the telephone app is closed-source and broken. After a phone call it sets the maximum to 600Mhz and the minimum to 250MHz (or 125MHz if available) irrespective of what you have set before. | ||
+ | # when connected via USB the device locks the minimum frequency to 500Mhz. | ||
+ | # By default the device is configured to use 125MHz as the lowest frequency but it not enabled in the kernel [https://bugs.maemo.org/show_bug.cgi?id=7116 pmconfig bug] | ||
+ | # if enable 125MHz also set "echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load" [http://talk.maemo.org/showpost.php?p=602687&postcount=185 hint] | ||
+ | # [http://talk.maemo.org/showpost.php?p=599870&postcount=170 improving responsiveness] | ||
+ | # [http://talk.maemo.org/showpost.php?p=599618&postcount=168 safe pmconfig configuration] | ||
+ | # the warning "WARNING: at arch/arm/mach-omap2/clock34xx.c:443 omap3_noncore_dpll_set_rate+0x28c/0x2dc()" in the kernel logs (dmesg) only happens if the invalid 800MHz frequency was selected. ignore it. | ||
+ | # [http://talk.maemo.org/showpost.php?p=603585&postcount=189 saving more battery power when idle] | ||
+ | # EvilJazz had photoshopped a [http://talk.maemo.org/showpost.php?p=605523&postcount=90 picture of a device being overclocked 1.7GHz]. It's a JOKE! | ||
+ | # reading one of the temperature sensors "cat /sys/devices/platform/omap34xx_temp/temp1_input" | ||
- | = | + | =Useful stuff= |
- | + | ==Show current CPU frequency== | |
- | + | ||
- | + | ||
- | + | ||
- | + | awk '{print $1/1000" MHz"}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq | |
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- | |||
- | == | + | ==Set maximum CPU frequency== |
- | + | From root terminal: | |
- | + | ||
- | + | ||
- | + | rootsh echo 600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq | echo "" | |
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- | + | Replace 600000 with desired maximum frequency. Pay attention to the two exceptions in titan's kernels (124999 and 599000). The list of available frequencies on your device/kernel can be obtained with command: | |
- | + | ||
- | + | awk '{print $1/1000" MHz"}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state | |
- | + | ==Script for analyzing time_in_state (by rooted) - rev6== | |
- | + | This script prints percentage of frequencies (states) used and some additional info useful for posting on the forum (debugging). It displays all frequencies, works with all kernels and it is not affected by the bug which resets minimum frequency after phone call. | |
- | + | ||
- | + | The script is in active development. I'm adding new features and resolving bugs if they are reported. Please update your script to newest revision and report if something doesn't work properly. | |
- | + | Temperature may not be listed if you don't have module bq27x00_battery installed or enabled. Also kernel-maemo version is not listed if you don't use titan's kernel. | |
- | |||
- | |||
- | |||
- | + | #!/bin/sh | |
+ | |||
+ | currfreq=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq` | ||
+ | idlefreq=`awk '{if ($2 > 0) print $1}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state | tail -n 1` | ||
+ | tis1=`awk '{sum += $2} END {print sum}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state` | ||
+ | tis2=`awk '$1 == "'"$idlefreq"'" {idle = $2} {sum += $2} END {print sum-idle}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state` | ||
+ | |||
+ | echo -e " | ||
+ | SCRIPT FOR ANALYZING TIME_IN_STATE | ||
+ | By rooted (maemo.org) | ||
+ | Revision 6 | ||
+ | |||
+ | The script is in active development. | ||
+ | Update your script to current revision from: | ||
+ | wiki.maemo.org/Overclocking | ||
+ | |||
+ | |||
+ | FREQUENCY\tUSED\t\tWHEN BUSY\n" | ||
+ | awk ' | ||
+ | {if ($1 >= 1000000) printf ("%.0f MHz\t",$1/1000); else printf ("%.0f MHz\t\t",$1/1000)} | ||
+ | {if ($2 == 0) printf "unused"; else printf ("%.1f %\t\t",($2*100)/"'"$tis1"'")} | ||
+ | {if ($2 == 0 || $2/"'"$tis2"'" > 1) printf "\n"; else printf ("%.1f %\n",($2*100)/"'"$tis2"'")} | ||
+ | ' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state | ||
+ | |||
+ | echo -e " | ||
+ | Current frequency: $(($currfreq/1000)) MHz | ||
+ | Idle frequency: $(($idlefreq/1000)) MHz | ||
+ | Kernel: `uname -r` | ||
+ | kernel-maemo: `dpkg -l kernel* | awk '/kernel-maemo/ {print $3}'` | ||
+ | Uptime: `uptime | sed -e 's/.*p *//' -e 's/, l.*//' -e 's/ / /'` | ||
+ | Load: `uptime | sed 's/.*e: //'` | ||
+ | Boot reason: `cat /proc/bootreason` | ||
+ | Temperature: `cat /sys/class/power_supply/bq27200-0/temp` °C\n" | ||
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- | + | Output example: | |
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- | + | SCRIPT FOR ANALYZING TIME_IN_STATE | |
+ | By rooted (maemo.org) | ||
+ | Revision 6 | ||
+ | |||
+ | The script is in active development. | ||
+ | Update your script to current revision from: | ||
+ | wiki.maemo.org/Overclocking | ||
+ | |||
+ | |||
+ | FREQUENCY USED WHEN BUSY | ||
+ | |||
+ | 1200 MHz unused | ||
+ | 1100 MHz unused | ||
+ | 1000 MHz unused | ||
+ | 950 MHz unused | ||
+ | 900 MHz unused | ||
+ | 850 MHz unused | ||
+ | 810 MHz 1.6 % 56.7 % | ||
+ | 750 MHz 0.0 % 0.8 % | ||
+ | 700 MHz 0.1 % 1.9 % | ||
+ | 600 MHz 0.0 % 1.5 % | ||
+ | 550 MHz 0.0 % 1.2 % | ||
+ | 500 MHz 1.0 % 37.8 % | ||
+ | 250 MHz 97.3 % | ||
+ | 125 MHz unused | ||
+ | |||
+ | Current frequency: 250 MHz | ||
+ | Idle frequency: 250 MHz | ||
+ | Kernel: 2.6.28.10maemo-ulv-omap1 | ||
+ | kernel-maemo: 2.6.28-maemo21 | ||
+ | Uptime: 2 days, 2:27 | ||
+ | Load: 0.11, 0.04, 0.01 | ||
+ | Boot reason: pwr_key | ||
+ | Temperature: 25 °C | ||
- | == | + | ==Analyzing time in state, including idle mode stats (by ArbitRabbit)== |
- | + | The following script will show the current frequency and statistics for each state, including time spent in idle mode when the CPU is actually sleeping. | |
+ | This script works with the special frequency handling in Titan's kernel. | ||
- | + | To run this script as user and be able to set the frequencies you will need to install "[[Root_access|rootsh]]" via apt-get. | |
- | + | '''scheduler_stats.sh''' | |
- | + | #!/bin/sh | |
+ | awk '{print "\nCurrent frequency: "$1/1000" MHz\n"}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq | ||
+ | awk '{print "Minimum frequency: "$1/1000" MHz\n"}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq | ||
+ | awk '{print "Maximum frequency: "$1/1000" MHz\n"}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq | ||
+ | |||
+ | tis1=`awk '{SUM += $2} END {printf("%.0f",SUM/1000)}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state` | ||
+ | |||
+ | idle0=`awk '{printf ("%.0f",$1/1000)}' /sys/devices/system/cpu/cpu0/cpuidle/state0/time` | ||
+ | |||
+ | idle1=`awk '{printf ("%.0f",$1/1000)}' /sys/devices/system/cpu/cpu0/cpuidle/state1/time` | ||
+ | |||
+ | idle2=`awk '{printf ("%.0f",$1/1000)}' /sys/devices/system/cpu/cpu0/cpuidle/state2/time` | ||
+ | |||
+ | idle3=`awk '{printf ("%.0f",$1/1000)}' /sys/devices/system/cpu/cpu0/cpuidle/state3/time` | ||
+ | |||
+ | totaltime=$(($idle0+$idle1+$idle2+$idle3+$tis1)) | ||
+ | echo -e "FREQUENCY\tUSED" | ||
+ | SUM=0 | ||
+ | awk ' | ||
+ | { | ||
+ | printf (($1/1000)" MHz \t"); | ||
+ | if ($2 == 0) | ||
+ | { | ||
+ | printf "0 %\n"; | ||
+ | } | ||
+ | else { | ||
+ | SUM+=$2; | ||
+ | printf("%.3f %\n",($2/10)/"'"$totaltime"'"); | ||
+ | } | ||
+ | } | ||
+ | END{ | ||
+ | printf ("Time spent in idle mode is %2.2f %\n",(1-((SUM/1000)/"'"$totaltime"'"))*100); | ||
+ | }' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state | ||
+ | echo "" | ||
- | + | '''Sample Output''' | |
- | + | ||
- | + | Current frequency: 500 MHz | |
- | + | ||
- | + | Minimum frequency: 500 MHz | |
+ | |||
+ | Maximum frequency: 810 MHz | ||
+ | |||
+ | FREQUENCY USED | ||
+ | 1200 MHz 0 % | ||
+ | 1100 MHz 0 % | ||
+ | 1000 MHz 0 % | ||
+ | 950 MHz 0 % | ||
+ | 900 MHz 0 % | ||
+ | 850 MHz 0 % | ||
+ | 810 MHz 0.000 % | ||
+ | 750 MHz 0.000 % | ||
+ | 700 MHz 0.000 % | ||
+ | 600 MHz 0.000 % | ||
+ | 550 MHz 0.000 % | ||
+ | 500 MHz 0.010 % | ||
+ | Time spent in idle mode is 99.99 % | ||
- | + | Known Bugs: Requires the Phone to be booted for an hour or so before it results in decent stats. | |
- | + | ||
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- | + | ||
+ | ==Combined helper script (by evilJazz)== | ||
- | + | The following script will show the current frequency and statistics. It also accepts two optional parameters that will set the max and/or min frequencies (in MHz unit). Calling the script without these parameters will not set the new clocking. Instead it will just show the current frequencies and statistics. | |
- | + | ||
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- | + | This script works with the special frequency handling in Titan's kernel. | |
- | + | ||
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- | + | ||
- | + | To run this script as user and be able to set the frequencies you will need to install "[[Root_access|rootsh]]" via apt-get. | |
- | + | overclock.sh [max freq] [min freq] | |
- | + | ||
- | + | ||
- | + | ||
+ | #!/bin/sh | ||
+ | max=${1}000 | ||
+ | min=${2}000 | ||
+ | |||
+ | # Handle and rewrite special cases in Titan's kernel... | ||
+ | [ "$max" == "600000" ] && max=599000 | ||
+ | [ "$min" == "125000" ] && min=124999 | ||
+ | |||
+ | if [ $(id -u) -ne 0 ]; then | ||
+ | [ "$max" != "000" ] && echo "echo $max > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq" | sudo gainroot | ||
+ | [ "$min" != "000" ] && echo "echo $min > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq" | sudo gainroot | ||
+ | else | ||
+ | [ "$max" != "000" ] && echo $max > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq | ||
+ | [ "$min" != "000" ] && echo $min > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq | ||
+ | fi | ||
+ | |||
+ | awk '{printf("\nCurrent frequency: %7s MHz\n", $1/1000)}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq | ||
+ | awk '{printf("Minimal frequency: %7s MHz\n", $1/1000)}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq | ||
+ | awk '{printf("Maximal frequency: %7s MHz\n\n", $1/1000)}' /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq | ||
+ | |||
+ | sum=$(awk '{SUM += $2} END {print SUM}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state) | ||
+ | awk '{printf("%7s MHz: %5.1f % (%8d)\n", ($1/1000), ($2 * 100)/"'"$sum"'", $2)}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state | ||
+ | echo | ||
- | + | Output example: | |
- | + | ~ $ ./overclock.sh 600 250 | |
- | + | ||
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- | 600 | + | |
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- | 250 | + | |
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- | + | Current frequency: 250 MHz | |
- | + | Minimal frequency: 250 MHz | |
- | + | Maximal frequency: 599 MHz | |
- | + | ||
- | + | 1200 MHz: 0.0 % ( 0) | |
- | + | 1100 MHz: 0.0 % ( 0) | |
- | + | 1000 MHz: 0.0 % ( 0) | |
+ | 950 MHz: 0.0 % ( 0) | ||
+ | 900 MHz: 0.2 % ( 271) | ||
+ | 850 MHz: 0.0 % ( 0) | ||
+ | 810 MHz: 0.0 % ( 0) | ||
+ | 750 MHz: 0.0 % ( 0) | ||
+ | 700 MHz: 0.0 % ( 0) | ||
+ | 600 MHz: 9.0 % ( 13663) | ||
+ | 550 MHz: 0.5 % ( 701) | ||
+ | 500 MHz: 15.4 % ( 23379) | ||
+ | 250 MHz: 75.0 % ( 114021) | ||
+ | 124.999 MHz: 0.0 % ( 0) | ||
- | == | + | =Changing the Kernel= |
- | + | ||
- | + | ==Installing a modified Kernel== | |
- | + | ===Flashing using PC=== | |
- | + | 1. Power off the N900 completely. | |
- | + | ||
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- | + | 2. Hold "u" on the N900's keyboard, while holding, connect it to the PC via USB cable. | |
- | + | 3. You will see usb icon on top right of white Nokia screen. | |
- | + | 4. Now you can let go of "u" on the keyboard. | |
- | + | 5. Now use flasher utility with the kernel file located in the same directory. | |
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- | + | flasher-3.5 -k image_file_name -f -R | |
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- | + | 6. It should take about 1-2 seconds then it'll say Done. | |
- | + | 7. Now your N900 will show white Nokia screen. (reboot) | |
- | + | 8. At this time, you can pull out the USB cable. | |
- | + | 9. N900 should finish booting up if all goes well. | |
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- | + | 10. Test out your phone as usual. (Apps, browser, camera, phone etc etc) | |
- | = | + | 11. If any abnormal events occur frequently (crash, hang, screen corruption etc), turn it off, flash it to a slower kernel and test again. |
- | + | note: For Windows7 64bit users, you may need to use WindowsXP mode. ([http://www.youtube.com/watch?v=Bx6dblXl2eo Youtube Tutorial]) | |
- | |||
- | + | ===Flashing from N900 xterminal=== | |
- | + | * do a backup, have a pc nearby and know you are able to flash the n900 with flasher-3.5 - just in case | |
- | + | 0. Launch xterminal app then type sudo gainroot (need rootsh installed) | |
- | + | 1. type | |
- | + | softupd -vv -s --local | |
- | + | (thats double v) | |
- | + | ||
- | + | 2. open new terminal | |
- | + | ||
- | + | ||
- | + | 3. type | |
- | + | flasher --local -f -k <kernel_zimage_file_with_path> | |
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- | + | 4. you see the flashing (takes some time) | |
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- | + | 5. type "sync" to save changes | |
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- | + | 6. type "reboot" and enter to restart | |
- | + | 7. Test out your phone as usual. (Apps, browser, camera, phone etc etc) | |
- | + | 8. If any abnormal events occur frequently (crash, hang, screen corruption etc), turn it off, flash it to a slower kernel and test again. | |
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- | + | ||
- | + | '''You are fully responsible for any damage caused by overclocking. Not anyone else.''' | |
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- | === | + | ==Reverting to the Original Kernel== |
- | + | ||
- | + | If you want to revert to the original kernel, execute: | |
- | + | apt-get install --reinstall kernel kernel-flasher | |
- | + | ||
- | + | ||
- | + | =Voltage tables= | |
- | + | ||
- | + | One factor reducing CPU life time is the current it is running with. | |
+ | The current is proportional to frequency * voltage^2 (source?). | ||
+ | By reducing the voltage the damage of overclocking can be reduced and the battery life time extended. | ||
+ | According to [http://talk.maemo.org/showpost.php?p=606031&postcount=2375 this calculations] the voltage can be varied | ||
+ | in steps of 0.0125V so that V=x*0.0125+0.6. | ||
+ | The relative currents for different kernel settings can be found [http://talk.maemo.org/showpost.php?p=608126&postcount=2586 here]. | ||
- | + | ==Summary== | |
- | + | FREQUENCY Nokia LV ULV XLV ideal | |
- | + | 0 MHz 30 30 25 30 30 | |
- | + | 125 MHz 30 30 25 20 30 | |
+ | 250 MHz 38 38 25 30 30 | ||
+ | 500 MHz 48 48 33 33 30 | ||
+ | 550 MHz *54* 48 38 38 33 | ||
+ | 600 MHz 60 *54* 38 38 38 | ||
+ | 700 MHz 54 45 45 45 | ||
+ | 750 MHz 54 45 45 45 | ||
+ | 810 MHz 54 48 48 48 | ||
+ | 850 MHz 54 48 48 48 | ||
+ | 900 MHz 54 *54* *54* *54* | ||
+ | 950 MHz 54 54 54 54 | ||
+ | 1000 MHz 60 60 60 60 | ||
+ | 1100 MHz 72 72 72 72 | ||
+ | 1150 MHz 72 72 72 72 | ||
+ | 1200 MHz 72 72 72 72 | ||
- | + | Note: Asterisks indicate the first frequency in the kernel which needs overvoltage. | |
- | + | ||
- | + | ||
- | + | ==Nokia's kernel== | |
- | + | VALUE VOLTAGE FREQUENCY | |
- | + | 30 0.975V 0 MHz | |
- | + | 30 0.975V 125 MHz | |
- | + | 38 1.075V 250 MHz | |
+ | 48 1.200V 500 MHz | ||
+ | 54 1.275V 550 MHz | ||
+ | 60 1.350V 600 MHz | ||
+ | |||
+ | ==titan's LV kernel== | ||
- | + | VALUE VOLTAGE FREQUENCY | |
- | + | 30 0.975V 0 MHz | |
- | + | 30 0.975V 125 MHz | |
- | + | 38 1.075V 250 MHz | |
- | + | 48 1.200V 500 MHz | |
- | + | 48 1.200V 550 MHz | |
- | + | 54 1.275V 600 MHz | |
- | + | 54 1.275V 700 MHz | |
- | + | 54 1.275V 750 MHz | |
- | + | 54 1.275V 810 MHz | |
- | + | 54 1.275V 850 MHz | |
+ | 54 1.275V 900 MHz | ||
+ | 54 1.275V 950 MHz | ||
+ | 60 1.350V 1000 MHz | ||
+ | 72 1.500V 1100 MHz | ||
+ | 72 1.500V 1200 MHz | ||
- | kernel | + | ==titan's ULV kernel== |
- | + | ||
- | + | VALUE VOLTAGE FREQUENCY | |
+ | 25 0.912V 0 MHz | ||
+ | 25 0.912V 125 MHz | ||
+ | 25 0.912V 250 MHz | ||
+ | 33 1.012V 500 MHz | ||
+ | 38 1.075V 550 MHz | ||
+ | 38 1.075V 600 MHz | ||
+ | 45 1.163V 700 MHz | ||
+ | 45 1.163V 750 MHz | ||
+ | 48 1.200V 810 MHz | ||
+ | 48 1.200V 850 MHz | ||
+ | 54 1.275V 900 MHz | ||
+ | 54 1.275V 950 MHz | ||
+ | 60 1.350V 1000 MHz | ||
+ | 72 1.500V 1100 MHz | ||
+ | 72 1.500V 1200 MHz | ||
- | + | ==titan's XLV kernel== | |
- | + | VALUE VOLTAGE FREQUENCY | |
- | + | 30 0.975V 0 MHz | |
- | + | 20 0.850V 125 MHz | |
- | + | 30 0.975V 250 MHz | |
- | + | 33 1.012V 500 MHz | |
- | + | 38 1.075V 550 MHz | |
- | + | 38 1.075V 600 MHz | |
- | + | 45 1.163V 700 MHz | |
- | + | 45 1.163V 750 MHz | |
- | + | 48 1.200V 810 MHz | |
- | + | 48 1.200V 850 MHz | |
+ | 54 1.275V 900 MHz | ||
+ | 54 1.275V 950 MHz | ||
+ | 60 1.350V 1000 MHz | ||
+ | 72 1.500V 1100 MHz | ||
+ | 72 1.500V 1150 MHz | ||
- | + | ==titan's ideal kernel== | |
- | + | ||
- | + | ||
- | + | ||
- | + | ||
- | + | ||
- | + | VALUE VOLTAGE FREQUENCY | |
+ | 30 0.975V 0 MHz | ||
+ | 30 0.975V 125 MHz | ||
+ | 30 0.975V 250 MHz | ||
+ | 30 0.975V 500 MHz | ||
+ | 33 1.012V 550 MHz | ||
+ | 38 1.075V 600 MHz | ||
+ | 45 1.163V 700 MHz | ||
+ | 45 1.163V 750 MHz | ||
+ | 48 1.200V 810 MHz | ||
+ | 48 1.200V 850 MHz | ||
+ | 54 1.275V 900 MHz | ||
+ | 54 1.275V 950 MHz | ||
+ | 60 1.350V 1000 MHz | ||
+ | 72 1.500V 1100 MHz | ||
+ | 72 1.500V 1150 MHz | ||
- | + | ==/sys/power/vdd1_opps_vsel values== | |
- | + | LV: "30 30 38 48 48 54 54 54 54 54 54 54 60 72 72" | |
- | + | ULV: "25 25 25 33 38 38 45 45 48 48 54 54 60 72 72" | |
+ | XLV: "30 20 30 33 38 38 45 45 48 48 54 54 60 72 72" | ||
+ | ideal: "30 30 30 30 33 38 45 45 48 48 54 54 60 72 72" | ||
[[Category:Power users]] | [[Category:Power users]] | ||
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