I tried the Ubuntu kernel 3.13RC2, and the CPU user, sys, idle, and wait information making no sense at all issue remains.
As I see it now, if there is a fb0 device, then the issue will exist: doug@test-smy:~$ ls -l /dev/fb0 crw-rw---- 1 root video 29, 0 Dec 1 08:25 /dev/fb0 If there is not a fb0 device, then the issue will not exist (but I have to use ssh to communicate with the server). It doesn't matter which frame buffer driver is used: Nov 30 19:34:26 test-smy kernel: [ 6.720259] vesafb: framebuffer at 0xf8000000, mapped to 0xc8800000, using 3072k, total 3072k Nov 29 15:22:34 test-smy kernel: [ 6.873147] simple-framebuffer simple-framebuffer.0: fb0: simplefb registered! as a side note, kernel 3.13 seems to use the simple-framebuffer, regardless of the VESA stuff being "y" in the config: doug@test-smy:~$ grep framebuffer /var/log/kern.log Dec 1 08:25:21 test-smy kernel: [ 6.734202] simple-framebuffer simple-framebuffer.0: framebuffer at 0xf8000000, 0x300000 bytes, mapped to 0xc8800000 Dec 1 08:25:21 test-smy kernel: [ 6.734335] simple-framebuffer simple-framebuffer.0: format=r8g8b8, mode=1024x768x24, linelength=4096 Dec 1 08:25:21 test-smy kernel: [ 6.939867] simple-framebuffer simple-framebuffer.0: fb0: simplefb registered! I have searched bugzilla.kernel.org for any similar bug report and didn't find one (which doesn't mean there isn't one, just that I didn't find it). I compiled and tried the kernel 3.13RC2 from kernel.org, with the same results. I have not tried to compile and try a version with the config file reversions yet. Should I go upstream and file a bug on bugzilla.kernel.org? If yes, what would I file it under, as it is not clear to me? This issue appears to be related to recent work involving "CONFIG_X86_SYSFB" -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1254920 Title: CPU utilization / accounting issues Status in “linux” package in Ubuntu: Confirmed Bug description: The issue is on a Trusty 32 bit server edition. It is the very very old computer that I use for minimum requirements testing. The issue is CPU user, sys, idle, and wait information makes absolutely no sense at all. For example with the commands "top" or "vmstat" I believe I have isolated the issue down to kernel configuration differences between Saucy and Trusty. I used the two otherwise same kernels from the ppa to come to this conclusion (after many many other kernels and such were tried). References: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-saucy/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-trusty/ While there are a lot of configuration differences that are obviously not the issue (or so I think), there are many that I don't know if they could be or not. The computer I am using is too pathetic to compile the kernel (it takes 34 hours, and then it gives up before finishing anyhow). I will attach the config difference file in a moment. Automatic bug stuff has never worked for me on any of my computers, but I'll attach the other stuff asked for shortly. Example of expected vmstat output (server relatively idle): doug@test-smy:~/configs$ vmstat 20 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 292 3952 4936 48668 0 0 247 5 265 151 14 7 77 2 1 0 292 3912 4944 48708 0 0 2 2 252 50 0 0 100 0 1 0 292 3912 4944 48708 0 0 0 0 252 47 0 0 100 0 0 0 292 3900 4952 48708 0 0 0 2 252 49 0 0 99 1 0 0 292 3900 4952 48708 0 0 0 1 252 51 0 0 100 0 0 0 292 2636 4960 49928 0 0 61 1 253 56 0 0 99 1 Example of vmstat output now (server idle): doug@test-smy:~$ vmstat 20 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 5312 5544 3408 47900 8 22 1412 78 24253 4209 44 30 9 17 0 0 5312 5528 3416 47916 0 0 0 1 252 41 0 0 40 60 0 0 5312 5528 3416 47916 0 0 0 0 251 40 0 25 0 75 0 0 5312 5528 3416 47916 0 0 0 0 252 39 17 0 50 33 0 0 5312 5528 3416 47916 0 0 0 0 252 39 0 0 40 60 0 0 5312 5516 3424 47916 0 0 0 1 252 41 0 25 0 75 0 0 5312 5516 3424 47916 0 0 0 0 252 40 0 17 33 50 doug@test-smy:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Trusty Tahr (development branch) Release: 14.04 Codename: trusty doug@test-smy:~$ uname -a Linux test-smy 3.12.0-4-generic #10-Ubuntu SMP Thu Nov 21 22:11:22 UTC 2013 i686 i686 i686 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1254920/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
