Originally Posted by Mitrigol

Hey, i have a question for you all.

While doing some tests with Thumb kernel, i had some trouble with Powertop as the CPU in idle was too much on C3 state if i compare it without Thumb. I did this check because i had a little loss in battery consumption.

(the following is the short explaination, i can provide a more complete test process and info):
So as i tinker a lot with my N900, i though it is because of something else, so i did a backup and flashed the N900 with PR1.3 emmc and rootfs.
Then installed CSSU, KP50, KP-Settingsv14, batterygraph, rootsh and leafpad (yes, i am unable to understand how vi works)

Then did Powertop and dmesg to see the evolution. Everything was fine until a few hour after the reinstall, i suddenly got a big consumption drain. Confirmed in batterygraph.

So i started powertop and found a lot more interrupt than usual. Also, core, neon and ina2 in powertop result are always 100% ON.
then started DMESG and found out a lot of "procwrap_detach: deprecated dspbridge ioctl.
I also found this kind of error:

Code:

bridge_deh_notify: ********** DEVICE EXCEPTION **********
[ 2768.851745] bridge_deh_notify: DSP_MMUFAULT,err_info = 0x0
[ 2768.851776] bridge_deh_notify: DSP_MMUFAULT, High Address = 0x7246
[ 2768.851806] bridge_deh_notify: DSP_MMUFAULT, Low Address = 0x1240
[ 2768.851806] bridge_deh_notify: DSP_MMUFAULT, fault address = 0x72461240
[ 2768.852050] print_dsp_trace_buffer:
[ 2768.852081] (SYS_EFREE): segid = 540916496, ptr = 0x0, size = 537949416
[ 2768.852142] bridge_deh_notify: ********** DEVICE EXCEPTION **********
[ 2768.852142] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102
[ 2768.852233] print_dsp_trace_buffer:
[ 2768.852233] (SYS_EFREE): segid = 540916496, ptr = 0x0, size = 537949416
[ 2768.852264] bridge_deh_notify: ********** DEVICE EXCEPTION **********
[ 2768.852294] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102
[ 2768.852355] print_dsp_trace_buffer:
[ 2768.852386] (SYS_EFREE): segid = 540916496, ptr = 0x0, size = 537949416
[ 2768.852386] bridge_deh_notify: ********** DEVICE EXCEPTION **********
[ 2768.852416] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102
[ 2768.852478] print_dsp_trace_buffer:
[ 2768.852508] (SYS_EFREE): segid = 540916496, ptr = 0x0, size = 537949416
[ 2768.861450] wake_dsp: unexpected state a
[ 2768.861541] bridge_deh_notify: ********** DEVICE EXCEPTION **********
[ 2768.861541] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102
[ 2768.861663] print_dsp_trace_buffer:
[ 2768.861694] (SYS_EFREE): segid = 540916496, ptr = 0x0, size = 537949416

I somehow found out that this is happen while recording/playing movie.
I uninstalled KP50 and KP50-Settings, problem gone!

I also tried with DSP overclock profile.

This is something i tested a lot with different configuration, CSSU or not, DCIM folder on Internal/uSD, swap on internal/uSD/both, KP50/OMAP. And i only got this problem while KP50 installed, no matter the rest of my configuration.

I found a solution, it is to install 720p packages once KP50 is installed. Now i don't have any error.

I am using KP50 since the very beginning and never experienced this error, right is that i had 720p installed since the very beginning too...

I did not find any info about KP50 requiring 720p package to run properly, i checked TMO page and wiki.

So can any of you confirm this?



Thank you

Originally Posted by Mohammed Muid

plzzz help me. i cant uninstall power kernel v50. i clicked the nokia kernel symbol. after few min it appeared. ( successfully restored nokia kernel). then i rebooted and there was still kp50 option in the multiboot section. i tapped 3 to select it. then it loaded kp50. so it wasnt uninstalled. but the nokia kernel option wasnt there. then i followed the wiki steps. rebooted the device. my stock kernel was rebooting and kp50 showed guru meditation. my phone is in a reboot loop now. i restore my backup but unfortunately i created the backup with my kp50 installed. plzz help me to uninstall it safely. i will install cssu thumb. that is why.

Originally Posted by mauron85

What exactly is kernel-feature-video720p?

Originally Posted by joerg_rw

many thanks Pali!
I hope to find the time to look into all the hostmode related stuff. How would I check for kernel-feature-XY at runtime?

/j