Arm-dev June 2018

arm-dev@lists.centos.org

7 participants
12 discussions

rng-tools missing and /dev/hwrng without driver
by SW＠EU 31 Oct '25

31 Oct '25

Hi, today I will report a problem that is released to ipa-server. This server contains a certificate authority and such service need many entropy. The default on CentOS 7 on a Banana PI is not enough, i.e. $(cat /proc/sys/kernel/random/entropy_avail) is less than 1000. I have solved this in meantime by installing and enabling of haveged from the EPEL repository. Normally it would be done by installing the rng-tools. But there are two problems: 1. The rng-tools was not in the repositories, so I have downloaded rng-tools-5-8.fc24.armv7hl.rpm because this are the same version which is included in CentOS 7.3 for x86_64. 2. This rng-tools are usable but the daemon starts and stops immediately with the following error message: # rngd -v /dev/hwrng: No such device /dev/tpm0: No such file or directory No entropy sources found, exiting This is not the problem of this binary it is a problem of the Kernel. /dev/hwrng exists and if I remove it then it reappears after reboot, but # ls -l /dev/hwrng crw-------. 1 root root 10, 183 1. Jan 1970 /dev/hwrng # udevadm info -a -n /dev/hwrng Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device. looking at device '/devices/virtual/misc/hw_random': KERNEL=="hw_random" SUBSYSTEM=="misc" DRIVER=="" ATTR{rng_current}=="none" ATTR{rng_available}=="" there is no driver for this device. I have searched and found this link http://forum.lemaker.org/thread-23618-1-1.html which includes a link to the full story. If I read all right then on bananian /dev/hwrng appears only if the adapted or a more actual sun4i-ss.ko module is loaded (there is written: "module author has indicated this will be going into the mainline kernel shortly“). This module is also loaded on a Banana PI with current CentOS 7. So does the kernel of CentOS 7.3 for ARM32 include this patch and if yes why it does not work or otherwise why this device appears but has no driver? TIA, Silvio Sent with [ProtonMail](https://protonmail.com) Secure Email.

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EPEL repo not available?
by Boyd Ako 31 Oct '25

31 Oct '25

Can anybody verify that the EPEL repo for ARMHFP isn’t available? I keep getting an error saying the REPOMD file isn’t there when running yum. It works if I use —disablerepo=epel\* when using yum. But, there might be some stuff in the EPEL that I’m looking for. Running it on a Raspberry Pi 3 and trying to get Nagios installed for home use. Domo, Boyd H. Ako boyd.hanalei.ako(a)gmail.com (424) 244-9653 https://www.boydhanaleiako.me “Coming together is a beginning. Keeping together is progress. Working together is success.” -Henry Ford PGP/GPG Public Key: https://sks-keyservers.net/pks/lookup?op=get&search=0xC58073B21618F134

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Gigabyte MP30-AR0
by Gordan Bobic 31 Oct '25

31 Oct '25

Hi, I am toying with the idea of getting a Gigabyte MP30-AR0 board (despite the insanely exorbitant price tag). Has anyone got the aarch64 CentOS working on one of those? Any special instructions? Also, if I get the ISO, is it bootable on aarch64? Does the installer work? Or does the image have to be used like on 32-bit ARM? Thanks. Gordan

18 208

Generic armhfp / aarch64 root filesystem for CentOS 7.5.1804
by Uli Middelberg 17 Sep '18

17 Sep '18

Hi Fabian, hi Jim, the CentOS 7.5.1804 iso images have been released for a while now and I'm wondering if you have plans to provide a generic armhfp / aarch64 root filesystem [1],[2] as well? Cheers Uli [1] https://armv7.dev.centos.org/repodir/images-testing/CentOS-Userland-7-armv7… [2] http://mirror.centos.org/altarch/7.4.1708/isos/aarch64/CentOS-7-aarch64-roo…

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SSH/SCP/SFTP stalled with RPI 3B+
by Stephan Guilloux 28 Jun '18

28 Jun '18

Hi all, I face some strange issues with SSH/SCP/SFTP connection hangs on a 3B+. While transfering a huge file to a Linux Server, the connection hangs. I do observe this 100% time, when the file is like 1Gb or more I never observed this with smaller files, like RPMS. After some googling, I found the following threads: https://github.com/raspberrypi/linux/issues/2449 https://github.com/raspberrypi/linux/issues/2482 Made some attempts this morning, and I can confirm that I face the 1st one. I have no time, yet, to check the 2nd thread. OK. Both threads tend to indicate that TSO should be disabled, by default: sudo |ethtool -K eth0 tx-tcp-segmentation off| and it works perfectly ... Any chance to have the patch reported to CentOS ? https://github.com/raspberrypi/linux/commit/d3b70445bcf2ab9b132138dc1d320a2… Regards,

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SD backup and restore
by Chris Szilagyi 23 Jun '18

23 Jun '18

Hello: Just curious if anybody has a known working solution (for Linux, not Windows) to backup and restore the SD card. In particular one that will shrink the image and only use the space utilized on the card itself, and allow restoring to a different size SD card. I figure there might be a process to create the images that are provided for this distro, but I'm unable to figure out how they are created. I've been searching for and trying various scripts for other distros, and so far no luck in getting a working solution for this CentOS distro. Thank you very much. -- Chris

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Support for Raspberry Pi 1 ?
by Chris Szilagyi 07 Jun '18

07 Jun '18

Hello: I have been using CentOS Userland armv7hl for a while now on the officially supported boards. Is there any support at all or any way to run it on a Raspberry Pi 1 board? In particular the Raspberry Pi 1 model B. I haven't been able to find any information, and not sure what the official answer is. Thank you very much for all of the work on this release, it is great stuff! -- Chris

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Centos on RPI3 USB Booting
by Steven Ellis 06 Jun '18

06 Jun '18

Anyone managed to get the latest Centos image to boot via USB rather than microSD Card. I'm trying the following image - CentOS-Userland-7-armv7hl-RaspberryPI-Minimal-1804-sda.raw.xz It works find on a 16 GB MicroSD card I've confirmed that the USB Boot mode is enabled based on - https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/ms… # vcgencmd otp_dump | grep 17: 17:3020000a Steven -- Steven Ellis Senior Solution Architect - Red Hat New Zealand <http://www.redhat.co.nz/> *T:* +64 9 887 3207 *M:* +64 21 321 673 *E:* sellis(a)redhat.com

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Changes for the next armhfp release/images
by Fabian Arrotin 06 Jun '18

06 Jun '18

Hi list, Time permitting, in the last days/weeks, we worked with Pablo (thanks again) to catch up with some things in the CentOS armhfp land. So we'd like to discuss some of the changes we'll probably implement for the next 7.5.18xx release (we still don't know when that will happen though) : # images : - we'll switch from our current rbf scripts to appliance-creator, and we'll host the used kickstart files so that everybody can also respin various images or variants - as we now have Gnome/KDE working correctly and all built, we'll probably start building such images (like for Fedora) - selinux context is now good so doesn't need the "touch /.autorelabel && systemctl reboot" to then switch to enforcing mode - one "Generic" image to rule them all ! Idea is to not build/test for boards like cubietruck/bananapi/etc, as it's all supported upstream, but only one generic image/variant (like minimal or gnome) and just adapt the uboot bootloader. The only exception though will be for raspberrypi (2 and 3 ) : while the Generic image will work (tested already) with upstream kernel, we'll still offer a variant using the rpi foundation kernel, as we did in the past, as that will ensure that such users will also continue to get kernel updates as they get those right now # kernel: - we'll rebase to 4.14.x (new upstream LTS version, even if 4.9.x is still maintained upstream) : that will permit to support more boards probably (rpi kernel will also get a bump, already built too in testing) # uboot-tools : already updated to 2018.03 to also support more boards, but that will become mandatory as we'll *not* build specific images for specific board (as the Generic one can be used everywhere, and will only need the dd if= of=/dev/mmbclk0 for the uboot bootloader -- Fabian Arrotin The CentOS Project | https://www.centos.org gpg key: 56BEC54E | twitter: @arrfab

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EPEL for ARM testing/validation
by Steven Ellis 06 Jun '18

06 Jun '18

Is there a formal process for testing / validating the ARM builds for EPEL? I'm currently using the following repository # more /etc/yum.repos.d/epel-arm.repo [epel-arm] baseurl = https://armv7.dev.centos.org/repodir/epel-pass-1/ enabled = 1 gpgcheck = 0 name = CentOS EPEL for ARM For example - are their EPEL packages that aren't currently in the ARM release that need validation - is there a process to tag a release as "end user" tested? Steven -- Steven Ellis Senior Solution Architect - Red Hat New Zealand <http://www.redhat.co.nz/> *T:* +64 9 887 3207 *M:* +64 21 321 673 *E:* sellis(a)redhat.com

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Arm-dev June 2018