users April 2022

users@lists.fedoraproject.org

84 participants
78 discussions

Does anyone use Kexec?
by Patrick O'Callaghan 11 Apr '22

11 Apr '22

I came across kexec(8) and wondered if anyone has used it in Fedora to enable rapid rebooting after a kernel update. Just curious. poc

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Cursor jumping
by Beartooth 11 Apr '22

11 Apr '22

There seems to be some setting somewhere in recent releases (I'm running F35) that causes the mouse cursor to jump around when it hits certain positions. How do I turn this off? -- Beartooth Staffwright, Not Quite Clueless Power User Remember I know little (precious little!) of where up is.

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screen blanking, dpms, screen force on
by olivares33561 11 Apr '22

11 Apr '22

Dear fedora users, In previous versions of fedora, the commands /***** export DISPLAY=:0 /usr/bin/xset dpms force on; /usr/bin/xset -dpms; ******/ would force screen on and then to return to screen blanking /****** #/usr/bin/xset +dpms; /usr/bin/xset dpms force off; ********/ now they do not work like before. [olivares@fedora ~]$ /usr/bin/xset -dpms server does not have extension for -dpms option [olivares@fedora ~]$ /usr/bin/xset +dpms server does not have extension for +dpms option [olivares@fedora ~]$ /usr/bin/xset dpms force off server does not have extension for dpms option /usr/bin/xset: unknown option force usage: /usr/bin/xset [-display host:dpy] option ... To turn bell off: -b b off b 0 To set bell volume, pitch and duration: b [vol [pitch [dur]]] b on To disable bug compatibility mode: -bc To enable bug compatibility mode: bc To turn keyclick off: -c c off c 0 To set keyclick volume: c [0-100] c on To control Energy Star (DPMS) features: -dpms Energy Star features off +dpms Energy Star features on dpms [standby [suspend [off]]] force standby force suspend force off force on (also implicitly enables DPMS features) a timeout value of zero disables the mode To set the font path: fp= path[,path...] To restore the default font path: fp default To have the server reread font databases: fp rehash To remove elements from font path: -fp path[,path...] fp- path[,path...] To prepend or append elements to font path: +fp path[,path...] fp+ path[,path...] To set LED states off or on: -led [1-32] led off led [1-32] led on -led named 'name' led off led named 'name' led on To set mouse acceleration and threshold: m [acc_mult[/acc_div] [thr]] m default To set pixel colors: p pixel_value color_name To turn auto-repeat off or on: -r [keycode] r off r [keycode] r on r rate [delay [rate]] For screen-saver control: s [timeout [cycle]] s default s on s blank s noblank s off s expose s noexpose s activate s reset For status information: q To print version: -version [olivares@fedora ~]$ Is there a magic command to get this like it was before? Thanks & Best Regards, Antonio Sent from ProtonMail, encrypted email based in Switzerland.

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convert crontab jobs to systemd timers
by olivares33561 11 Apr '22

11 Apr '22

Dear kind Fedora users, I have a crontab file that I use to play some files about 3 minutes before bell rings between classes. I had to install anacron with dnf command. I have seen emails where some folks recommend systemd timers. How can I convert a crontab # [olivares@fedora Downloads]$ crontab -l # min hour day-of-month month day-of-week command # 0-59 0-23 1-31 1-12 0-6 0=sun 1=mon #50 04 * * 1-5 ~/.xalarm >/dev/null 2>&1 #50 04 * * 0,6 ~/.salarm >/dev/null 2>&1 #59 09 * * 0,6 ~/.salarm >/dev/null 2>&1 #00 07 * * 1-5 ~/.xalarm >/dev/null 2>&1 42 08 * * 1-5 ~/.dalarm >/dev/null 2>&1 52 09 * * 1-5 ~/.dalarm >/dev/null 2>&1 40 10 * * 1-5 ~/.dalarm >/dev/null 2>&1 28 11 * * 1-5 ~/.dalarm >/dev/null 2>&1 16 12 * * 1-5 ~/.dalarm >/dev/null 2>&1 57 12 * * 1-5 ~/.dalarm >/dev/null 2>&1 40 14 * * 1-5 ~/.dalarm >/dev/null 2>&1 28 15 * * 1-5 ~/.dalarm >/dev/null 2>&1 17 16 * * 1-5 ~/.dalarm >/dev/null 2>&1 #30 16 * * 1-5 ~/.lalarm > /dev/null 2>&1 25 16 * * 1-5 /usr/sbin/poweroff >/dev/null 2>&1 # to systemd timers? An easy idiot proof way. The .dalarm script calls mplayer and plays from a playlist. # [olivares@fedora Downloads]$ sudo systemctl list-timers [sudo] password for olivares: NEXT LEFT LAST PASSED UN> Tue 2022-04-05 15:13:39 CDT 1min 46s left n/a n/a sy> Tue 2022-04-05 15:38:11 CDT 26min left n/a n/a dn> Wed 2022-04-06 00:00:00 CDT 8h left Tue 2022-04-05 05:34:07 CDT 9h ago lo> Wed 2022-04-06 00:00:00 CDT 8h left Tue 2022-04-05 05:34:07 CDT 9h ago un> Wed 2022-04-06 00:34:55 CDT 9h left Tue 2022-04-05 05:34:07 CDT 9h ago pl> Sun 2022-04-10 01:00:00 CDT 4 days left Tue 2022-04-05 05:34:07 CDT 9h ago ra> Mon 2022-04-11 00:20:16 CDT 5 days left Tue 2022-04-05 05:34:07 CDT 9h ago fs> 7 timers listed. Pass --all to see loaded but inactive timers, too. # I have read https://opensource.com/article/20/7/systemd-timers and https://www.maketecheasier.com/use-systemd-timers-as-cron-replacement/ but have not tried it out. Any help on this is appreciated. I want to test it out. Thank you in advance Regards, Antonio Sent from ProtonMail, encrypted email based in Switzerland.

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audio problem
by Eyal Lebedinsky 11 Apr '22

11 Apr '22

I am on f34 5.15.16-100.fc34.x86_64 This problem started recently (a few weeks, maybe a little longer?). Initially I noticed audio hiccups when playing mythtv recordings. At times there was also video noise but not always. I then found that playing audio from a network stream (with vlc) also had hiccups. The sound would stop and start, sometime even repeat a fraction of a second. I now played a track from a local disk and the same issues were heard. There are no messages to indicate a problem. I then used 'mplayer' which has more console messages and I now can see an issue: ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 58.134.100 (external) Mismatching header version 58.130.100 AUDIO: 44100 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->176400) Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio) ========================================================================== [AO SDL] Samplerate: 44100Hz Channels: Stereo Format s16le AO: [sdl] 44100Hz 2ch s16le (2 bytes per sample) Video: no video Starting playback... A: 49.9 (49.8) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 49.9 (49.8) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 50.3 (50.3) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 50.3 (50.3) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 50.4 (50.3) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 50.4 (50.3) of 278.4 (04:38.4) 0.6% A: 165.7 (02:45.7) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 165.7 (02:45.7) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 165.8 (02:45.7) of 278.4 (04:38.4) 0.6% Audio device got stuck! A: 165.8 (02:45.7) of 278.4 (04:38.4) 0.6% Audio device got stuck! Here are the sound devices: $ aplay --list-devices **** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 1: ALC887-VD Digital [ALC887-VD Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2] Subdevices: 0/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4] Subdevices: 1/1 Subdevice #0: subdevice #0 I get similar problems with [HDMI 3] and with [ALC887-VD Analog] selected using pavucontrol. lspci shows Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10) What can I do now to diagnose the problem? One more data point: for a long time (many months) I had a problem where the system locks up hard needing a cold restart. There were no hiccups otherwise. It always had mythtv playing or YouTube. When locked the sound of the last second would loop continuously until the reset. The video is frozen then. Maybe related? This is a long running problem (happens once every few months) but the audio stutter is a recent, new issue. TIA -- Eyal Lebedinsky (fedora(a)eyal.emu.id.au)

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nm: /usr/lib64/libmpfr.so.6: no symbols
by Michael Hennebry 10 Apr '22

10 Apr '22

nm: /usr/lib64/libmpfr.so.6: no symbols I recently changed to F35 partly in the hope it would have gappa 1.4 instead of F33's gappa 1.3 . No such luck, so I am trying to build from source. ./configure complains checking for mpfr_snprintf in -lmpfr... no configure: error: *** Unable to find MPFR (>=2.4) library (http://www.mpfr.org/) hennebry@fedora ~]$ locate mpfr.so /usr/lib64/libmpfr.so.6 /usr/lib64/libmpfr.so.6.1.0 [hennebry@fedora ~]$ nm -a /usr/lib64/libmpfr.so.6 nm: /usr/lib64/libmpfr.so.6: no symbols [hennebry@fedora ~]$ nm -a /usr/lib64/libmpfr.so.6.1.0 nm: /usr/lib64/libmpfr.so.6.1.0: no symbols [hennebry@fedora ~]$ [hennebry@fedora ~]$ strings /usr/lib64/libmpfr.so.6.1.0 | grep mpfr_snprintf mpfr_snprintf What is going on? With no symbols, how is the library ever used? I'd thought nm -a was supposed to list all of them. BTW I did eventually realize that libmpfr.so.6 is a soft link to the other. -- Michael hennebry(a)web.cs.ndsu.NoDak.edu "Sorry but your password must contain an uppercase letter, a number, a haiku, a gang sign, a heiroglyph, and the blood of a virgin." -- someeecards

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Attempting mount of Bootable CD/DVD gives "Can't open blockdev" message
by George R Goffe 10 Apr '22

10 Apr '22

Hi, I'm not sure what to do about this problem. Is it a broken device? I'm seeing "no media found" messages too. blockdev /dev/sr0 says: fc37-bash 5.1 ~# blockdev /dev/cdrom blockdev: cannot open /dev/cdrom: No medium found fc37-bash 5.1 ~# blockdev --report /dev/cdrom RO RA SSZ BSZ StartSec Size Device rw 256 512 512 0 1073741312 /dev/cdrom mount says: fc37-bash 5.1 ~# mount /dev/cdrom /mnt mount: /mnt: no medium found on /dev/sr0. dmesg(1) may have more information after failed mount system call. dmesg | tail -3 says: [ 2159.692983] /dev/sr0: Can't open blockdev [ 2908.948008] /dev/sr0: Can't open blockdev [ 3597.306199] /dev/sr0: Can't open blockdev I have tried inserting an old (1996) bootable cd media AND a quite recent "live" DVD media from Fedora Core 36/7 with the same messages. Booting from the DVD using an external CD/DVD player (NOT the broken(?) one) does work. I have not tried the old cd at all recently (1996). Any attempt to use the internal(?) CD/DVD fails. eject /dev/sr0 DOES work though. Again, is the device broken? What else should I try? Best regards and STAY SAFE. George...

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Temporary XFCE Thunar weirdness
by Sam Varshavchik 10 Apr '22

10 Apr '22

Something weird happened after I installed a bunch of updates and rebooted. There were no kernel updates, or anything that I recall might be related. Normally I have a lone "File System" icon that opens up Thunar. After the reboot I got half a dozen icons. I recall a "Root Filesystem" icon, a "proc" icon, a "sys" icon; an icon for every filesystem mount point. It was really weird. Additionally attaching my MP3 player, a usb-storage device, elicited no response, it was not getting auto-mounted. I tried logging out and in, without any changes. After another reboot things were back to normal. Just the "File System" icon that, obediently, launched Thunar. My usb-storage device was getting auto- mounted just fine. Has anyone else seen this before, and know what's up? I'd be curious to know if there's a way to fix this up without rebooting.

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Unlogging
by Beartooth 08 Apr '22

08 Apr '22

Recent releases (I"m running F35) seem to log me out at certain times, regardless of what I'm doing. I want not ever to get logged out. How and where do I set that? -- Beartooth Staffwright, Not Quite Clueless Power User Remember I know little (precious little!) of where up is.

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WSL
by Patrick Dupre 08 Apr '22

08 Apr '22

Hello, Does somebody have experience with fedora and WSL? https://docs.microsoft.com/en-us/windows/wsl/install Thanks =========================================================================== Patrick DUPRÉ | | email: pdupre(a)gmx.com Laboratoire interdisciplinaire Carnot de Bourgogne 9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE Tel: +33 (0)380395988 | | Room# D114A ===========================================================================

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