Arm-dev June 2019

arm-dev@lists.centos.org

10 participants
16 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

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centos 7 64 bit on raspberry Pi 3
by R 23 Sep '20

23 Sep '20

Hello, I was wondering if there is a procedure for installing Centos 7 on the Raspberry Pi 3 B+ while installing Centos 7.5 on armhfp is very clear and documented given that a raw root image is provided and you just "dd" it on the memory card, it is not clear to me how to do it with aarch64. A ISO image is provided but how to install it on the raspberry ? thank you Rick

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epel-release
by Robert Moskowitz 30 Jun '20

30 Jun '20

Ok, I see this epel-release in the epel1 repo that I installed via the wiki. So I decide to install it, and it created an epel.repo.rpmnew file. I swicth around the files and try a 'yum update' and get: epel/armhfp/metalink | 47 kB 00:00 Could not parse metalink https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=armhfp error was No repomd file One of the configured repositories failed (Unknown), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: .... File /var/cache/yum/armhfp/7/epel/metalink.xml does not exist So I put everything back.

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bluetooth on CentOS Linux release 7.6.1810
by R C 31 May '20

31 May '20

Hello, I am going to use a raspberry PI for browsing on a TV, so I want to connect with a wireless keyboard, bluetooth. It looks like bluetooth is "not running"; [rocr@centos-rpi3 ~]$ systemctl status bluetooth.service ● bluetooth.service - Bluetooth service Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled) Active: inactive (dead) Docs: man:bluetoothd(8) I don't have any bluetooth devices connected yet. but the service should be up, right? Is there a write-up, guide, to get bluetooth configured? thanks, Ron

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Re: [Arm-dev] Add Marvell Armada7k8k NIC (mvpp2) support patches
by Marcin Wojtas 26 May '20

26 May '20

Hi Jim, It's been a while, since I sent the patch. Any objections about merging? Is v4.11 kernel still a valid baseline or for the next releases or we should use v4.14? When is that transition and next release supposed to happen? Best regards, Marcinsob., 23 cze 2018 o 08:18 Marcin Wojtas <mw(a)semihalf.com> napisał(a): > > Hi, > > I'm sending a patch that is applicable on top of the kernel > sig-altarch7-aarch64 branch. It enables ACPI support for the Marvell > Armada7k8k NIC - this required backporting very big amount of patches > (all merged upstream), hence I decided to attach the single commit, > instead of issueing 'git send-email' of it. > > Despite many attempts I wasn't able to build entire rpm package with > the mock build utility, however I managed to test the clean kernel > v4.11 with applied all patches and built with updated .config. Please > let know if this patch is sufficient and can be merged. > > Thanks, > Marcin

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Re: [Arm-dev] Xorg Segfault, Firefox Illegal Instruction
by Gordan Bobic 29 Jun '19

29 Jun '19

Interesting. I don't see any info on how to disable NEON, though, only an insinuation that there is a way. On Sat, Jun 29, 2019 at 3:50 PM Gordan Bobic <gordan.bobic(a)gmail.com> wrote: > Interesting, but I don't see any info on how to disable NEON use in > there... > > On Sat, Jun 29, 2019 at 2:45 PM Pablo Sebastián Greco < > pablo(a)fliagreco.com.ar> wrote: > >> >> El 28/6/19 a las 12:54, Gordan Bobic escribió: >> >> On Fri, Jun 28, 2019 at 4:42 PM Pablo Sebastián Greco < >> pablo(a)fliagreco.com.ar> wrote: >> >>> >>> El 28/6/19 a las 10:38, Gordan Bobic escribió: >>> >>> I took the CentOS 7 arm32 image for a spin today and ran into some >>> issues. Is there a bug tracker that anyone pays attention to for >>> semi-supported altarch like armv7? >>> >>> I'm using a Tegra 2 based system >>> >>> Issues: >>> 1) Xorg segfaults while probing platform, according to the logs. >>> Only solution I have found is to create a new .repo file for CentOS 7.5 >>> and downgrade xorg-x11-server-Xorg to 1.19.x from CentOS 7.5. >>> >>> I thought I had pushed the fix to the fasttrack repo, but I didn't. >>> Here's a fixed version from my tests >>> https://people.centos.org/pgreco/xorg-x11-server/20190507012356/ >>> Anyway, it is already reported in RH, and it seems to be fixed in 7.7 >>> beta and 8.0 >>> >> >> >> Great, thanks. >> Since I posted that I discovered I actually had to roll all the way back >> to Xorg 1.14 from Fedora 20 because the last binary Tegra 2 Nvidia driver >> (I'm on an AC100) is ABI v14. I'm currently wrestling a monstrosity of a >> Tegra 2 GPU kernel driver patch against a mainline kernel that will >> probably take most of a day to compile... >> >> >>> >>> 2) Firefox 60.x dies on startup with an Illegal Instruction error. >>> FF 52.7 from CentOS 7.5 works. >>> >>> That one I haven't seen, I'll try to replicate it in one of my devices >>> and get back to you >>> >> >> Thanks. most appreciated. >> >> Gordan, I don't have good news..., firefox is working normally in my >> rpi3b+, my theory is that you're hitting this >> https://bugzilla.mozilla.org/show_bug.cgi?id=1289569 >> >> Gordan >> >> _______________________________________________ >> Arm-dev mailing listArm-dev@centos.orghttps://lists.centos.org/mailman/listinfo/arm-dev >> >> Pablo. >> _______________________________________________ >> Arm-dev mailing list >> Arm-dev(a)centos.org >> https://lists.centos.org/mailman/listinfo/arm-dev >> >

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Chromium for armv7hl?
by Gordan Bobic 29 Jun '19

29 Jun '19

Is there a rpm-ed Chromium package? Has anyone managed to get this to build on armv7hl recently?

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Xorg Segfault, Firefox Illegal Instruction
by Gordan Bobic 29 Jun '19

29 Jun '19

I took the CentOS 7 arm32 image for a spin today and ran into some issues. Is there a bug tracker that anyone pays attention to for semi-supported altarch like armv7? I'm using a Tegra 2 based system Issues: 1) Xorg segfaults while probing platform, according to the logs. Only solution I have found is to create a new .repo file for CentOS 7.5 and downgrade xorg-x11-server-Xorg to 1.19.x from CentOS 7.5. 2) Firefox 60.x dies on startup with an Illegal Instruction error. FF 52.7 from CentOS 7.5 works. Is anyone working on either of these? I think the former affects more than just ARM. Gordan

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Arm-dev June 2019