OK, so this is annoying. The background behind the report I made on 2018-07-03 (message #47) is that I have had a Mint install on a desktop computer (fairly old hardware) and that at some point I started to switch over to the Dell Latitude E6400 laptop that I mentioned (just swap the hard drive, an ssd). This just worked. This is something that didn't use to just work with Linux many years ago and I was pleased that it now does.
At some point, it developed this high cpu use issue (I believe this happened upon the switch to Mint 19 but earlier is possible since my noticing this would depend on how often I tried using the hard drive with the Mint install in the Dell laptop which at this point may not have been that often). I applied one fix mentioned here & the issue went away (although it broke Bluetooth). I forgot about it for a while. At some point, I created a full separate install on a USB flash drive just to have an install to play with because I needed something Ubuntu based (Mint being close enough for my purposes) —though I did choose to go with Mate instead of Cinnamon (which is what I have on my main install). Of course, I had the same issue again. I went back to this thread to refresh my memory about fixing the issue and noticed the slightly better fix for the issue mentioned in message #70. The fix worked and I was glad to find that Bluetooth works. So now came the time when I decided I will be using my main install from my desktop in my laptop again for a period of time and I am surprised to find that when it boots I am greeted with a message advising me that it's "Running in software rendering mode" and that I should expect high cpu use. Then I notice that I'm again having high cpu use even for running in rendering mode (from ~45%-100% —and maybe going closer to 100% over time?). Investigating this leads me,... right back to here. The issue with the '/97-hid2hci.rules' is gone (having also applied the fis from message #70 on this install) but now I seem to have the same issue as what Gaétan QUENTIN writes about on this thread on message #7 on the date of 2018-05-02. I attempted the fix from #9 and it did not work. I then attempted the fix from #50 and it got rid of the repeating Nvidia messages mentioned in #7 when executing 'sudo /lib/systemd/systemd-udevd -D'. However, the message "Running in software rendering mode" and cpu use may have gone down slightly but is still extremely high. I don't know how to get rid of this. My inclination was to go to the Driver manager to try to enable the recommended nvidia-340 binary driver but my only allowed choice is 'Continue using a manually installed driver' (the other options, the NVIDIA binary driver and the Nouveau driver are greyed out and not selectable). Keep in mind that I did not have the issue with previous Mint versions and keep in mind that, after applying the fix described in message #70, a different install of the same Mint version number on the exact same hardware does not have this problem (however, the difference could be that this other install is using Mate). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to bluez in Ubuntu. https://bugs.launchpad.net/bugs/1759836 Title: systemd-udevd consumes 100% of CPU Status in linux: Confirmed Status in The Ubuntu Power Consumption Project: New Status in bluez package in Ubuntu: Invalid Status in linux package in Ubuntu: Incomplete Status in systemd package in Ubuntu: Confirmed Bug description: The systemd-udevd proccess consumes 100% of a thread everytime, but i'm not noticing any difference in my computer. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: systemd 237-3ubuntu6 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 Uname: Linux 4.15.0-13-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.9-0ubuntu2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu Mar 29 08:52:54 2018 InstallationDate: Installed on 2018-03-05 (23 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180304) MachineType: Dell Inc. Inspiron N5010 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic root=UUID=3c29e292-f1ae-45e1-a0ed-a82524278ce1 ro quiet splash vt.handoff=1 SourcePackage: systemd SystemdDelta: [EXTENDED] /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf [EXTENDED] /lib/systemd/system/user@.service → /lib/systemd/system/user@.service.d/timeout.conf 2 overridden configuration files found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/25/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A12 dmi.board.name: 08R0GW dmi.board.vendor: Dell Inc. dmi.board.version: A12 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A12 dmi.modalias: dmi:bvnDellInc.:bvrA12:bd01/25/2011:svnDellInc.:pnInspironN5010:pvrA12:rvnDellInc.:rn08R0GW:rvrA12:cvnDellInc.:ct8:cvrA12: dmi.product.name: Inspiron N5010 dmi.product.version: A12 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/kernel/+bug/1759836/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
