# Tx2 on jetPack 4.5.1 **URL:** \ **Category:** Jetson TX2\ **Tags:** kernel\ **Created:** [June 22, 2021, 12:50pm UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524 "2021-06-22T12:50:45Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![npcdna](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@npcdna](https://forums.developer.nvidia.com/u/npcdna)\ **Post date:** [June 22, 2021, 12:50pm UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524/1 "2021-06-22T12:50:45Z")
When I installed two TX2 systems with the latest jetpack 4.5.1, I went into TX2 and switched to maximum power mode 0. I found that my TX2, CPU2 and cpu3 worked at 0%. Even if I let them work overload and other CPUs worked at about 90%, CPU2 and cpu3 still worked at 0%. Only at the moment of switching mode, they would change. Is this a TX2 hardware problem or not suitable for jetpack 4.5.1. ---
**Author:** ![WayneWWW](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/waynewww/32/14043_2.png) [@WayneWWW](https://forums.developer.nvidia.com/u/WayneWWW)\ **Post date:** [June 22, 2021, 3:27pm UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524/2 "2021-06-22T15:27:59Z")
This is not a bug. These two cores are disabled on purpose. > [@6 cores are visible but no work is distributed to the 2 Denver cores](https://forums.developer.nvidia.com/t/6-cores-are-visible-but-no-work-is-distributed-to-the-2-denver-cores/158563): > > Hi. I am wondering why no work is ever assigned to the two Denver cores although I am running in the MAX-N model. I have both tested with nvpmodel -m 0 and by running jetson\_clocks. I am able to see all 6 cores in both top, htop and in tegrastats but the CPU load of the two Denver cores always remains at 0%. I am able to launch a new process and move it to the Denver cores with taskset but no work is automatically distributed to these cores. Why is that so? I am running Ubuntu 18.04 from Jet… > [@Jetson TX2 has 2 cpu online but sitting at 0%](https://forums.developer.nvidia.com/t/jetson-tx2-has-2-cpu-online-but-sitting-at-0/159311): > > Hello, Our team is currently developing some application on the jetson tx2 and, at the moment, we cannot accurately benchmark it because 2 of the board’s CPU are sitting a 0% (although online), here is a screenshots to show the problem, this frequency is measured on jtop as well as the ubuntu system monitor. Note that, from what we can tell, they are not offline: On jtop, offline CPUs are shown with a red OFF sign (which is clearly not the case here) We have (repeatedly) executed… > [@2 cores at 0%](https://forums.developer.nvidia.com/t/2-cores-at-0/155303/): > > Hey, I took a fresh flashed Jetson TX2 device (Jetpack 4.4) and activated all cores sudo nvpmodel -m 0. After that, all 6 cores were displayed in htop, but core 2 and 3 are always at 0%. What can go wrong there? ---
**Author:** ![npcdna](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@npcdna](https://forums.developer.nvidia.com/u/npcdna)\ **Post date:** [June 23, 2021, 6:52am UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524/3 "2021-06-23T06:52:01Z")
thanks， i figured that. ---
**Author:** ![edward1\_lin](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@edward1\_lin](https://forums.developer.nvidia.com/u/edward1_lin)\ **Post date:** [July 9, 2021, 9:16am UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524/4 "2021-07-09T09:16:25Z")
Hello Wayne, Could I know why Nvidia default disable the two cores on Jetpack 4.5.1? ---
**Author:** ![WayneWWW](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/waynewww/32/14043_2.png) [@WayneWWW](https://forums.developer.nvidia.com/u/WayneWWW)\ **Post date:** [July 14, 2021, 3:59am UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524/5 "2021-07-14T03:59:32Z")
Please check the release note in this website. There is the reason for it. > **[L4T R32.4.4 archive](https://developer.nvidia.com/embedded/linux-tegra-r3244)** ---
**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\ **Post date:** [September 12, 2021, 4:00am UTC](https://forums.developer.nvidia.com/t/tx2-on-jetpack-4-5-1/181524/6 "2021-09-12T04:00:13Z")
Closed on September 12, 2021, 4:00am UTC This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.