Discuss September 2023

discuss@lists.centos.org

8 participants
7 discussions

Memory vs. Display Card
by Rick 28 Oct '25

28 Oct '25

Since memory has become quite cheap lately I decided to move from 2 GB to 6. When I installed the memory every thing was fine until I went to run level 5. At that point the screen turned to garbage and the system froze. Is there a way to fix this so I can use the memory I bought? Do I need a new display card? Current hardware: Intel D975XBX2 Motherboard VGA compatible controller: ATI Technologies Inc RV505 [Radeon X1550 64-bit] -- http://www.spinics.net/lists/

13 19

SSD for Centos SWAP /tmp & /var/ partition
by Keith Roberts 03 Sep '25

03 Sep '25

Has anyone actually used a SSD in a Centos setup? My little experiment with a s/h WD drive for /tmp and SWAP partitions kicked the bucket on Wednesday, when the poor WD drive caught the click-of-death. It was a s/h drive to start with and lasted about 4 months. But that was without the /var/log/ partition being written to it, as I mounted that back onto /var/log from the original drive. So I had to install another (WD) drive, and repartion it and rebuild my RPM package database, from the backed-up Packages file. That seems to be all OK now. I'm wondering if it would be a good idea to use a new SSD for moving all the disk i/o to, that Linux likes to do so often. Plus putting SWAP onto a decent SSD should speed things up somewhat. Here's a short video of a laptop fitted with a SSD drive booting macOS, compared to a similar laptop booting from the standard HDD. The laptop with the SSD boots and loads some apps in 28 seconds. The other one takes twice as long. http://eshop.macsales.com/shop/SSD/OWC/Mercury_Extreme_Pro_6G/?utm_source=t… Kind Regards, Keith Roberts ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------

33 96

Problems with CentOS 8 kickstart
by Hooton, Gerard 23 Jun '25

23 Jun '25

Hi All, I am having problems with a kickstart install of CentOS 8 When I try to do a completely automated install using PXE/UEFI it get to the point where it reads the kickstart config file. Then I see the following message "kickstart install Started cancel waiting for multipath siblings for nvme0n1" This is what I have in the kickstart file # Clear the Master Boot Record zerombr # Partition clearing information clearpart --all --initlabel autopart --nohome --type=lvm --fstype=xfs ================ When I install from a USB drive it works OK and I have the following in /dev/disk/by-id lrwxrwxrwx. 1 root root 13 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810 -> ../../nvme0n1 lrwxrwxrwx. 1 root root 13 Jul 5 10:28 nvme-eui.002538b11102f46d -> ../../nvme0n1 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 wwn-eui.002538b11102f46d-part3 -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810-part3 -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-eui.002538b11102f46d-part3 -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 lvm-pv-uuid-5Dg4mg-saHa-hJJ6-n5a8-MxBS-gdFi-5jPoNn -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 wwn-eui.002538b11102f46d-part2 UNG_MZVL2512HCJQ-0-> ../../nvme0n1p2 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810-part2 -> ../../nvme0n1p2 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-eui.002538b11102f46d-part2 -> ../../nvme0n1p2 drwxr-xr-x. 2 root root 400 Jul 5 10:28 . lrwxrwxrwx. 1 root root 15 Jul 5 10:28 wwn-eui.002538b11102f46d-part1 -> ../../nvme0n1p1 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810-part1 -> ../../nvme0n1p1 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-eui.002538b11102f46d-part1 -> ../../nvme0n1p1 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-uuid-LVM-qQok4M7AOo1TxZZ42GwZcbuVNBs0hnkKtEdtLjwJQyIdxJcSvPv8TEAjwYGMv6yU -> ../../dm-0 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-uuid-LVM-qQok4M7AOo1TxZZ42GwZcbuVNBs0hnkKAooqrczySYJyiHvUAUji9oScPN2cVi7J -> ../../dm-1 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-name-cs_uews027-swap -> ../../dm-1 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-name-cs_uews027-root -> ../../dm-0 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-uuid-LVM-qQok4M7AOo1TxZZ42GwZcbuVNBs0hnkK5HZXbR2ow5xKGuD7jVe4UPzZm2qRLLXI -> ../../dm-2 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-name-cs_uews027-home -> ../../dm-2 It's looks like that I am not doing the disk drive stuff in the config file correctly. -- Gerard Hooton. Senior Technical Officer School of Engineering. University College Cork. College Road. Cork. Ireland. Loc8: WDR-04-60G Tel: +353 21 4902296 Mobile: +353 852813491

3 7

Issues booting centos7 [dracut is failing to enable centos/root, centos/swap LVs]
by Yannis Milios 01 Feb '25

01 Feb '25

Hello, I'm having a strange problem booting a new centos7 installation. Below some background on this. [I have attached the tech details at the bottom of this message] I started a new CentOS7 installation on a VM, so far all good, o/s boots fine. Then I decided to increase VM disk size (initially was 10G) to 13G. Powered off the VM, increased the vhd via the hypervisor, booted from CentOS livecd, selected "recover my centos installation". Then I used the following sequence of commands to make the new vhd size "visible" to the o/s ... - ran fdisk /dev/sda and deleted partition 2. (This is the LVM partition where the o/s is stored. The first partition is /boot [xfs] partition *non lvm*.) - created a new partition with same starting sector as before deleting it, but a different ending sector (to reflect to the increased space). - set partition type to 8e (lvm), saved settings and exit. - ran pvresize and lvresize to make new space visible to the o/s.All good, I can see the space increase on 'lvdisplay centos/root'. - ran 'mount /dev/mapper/centos-root /mnt/root' to temporarily mount the o/s partition. - ran 'xfs_growfs /mnt/root' to resize the o/s fs to the new size. It was successful and I could actually chroot to the o/s and verify new disk size. - rebooted and tried to boot from hdd this time. Grub menu shows up and loads default kernel (3.10.0-862.9.1.el7.x86_64). - after initial kernel boot up process, booting continues to initrd and then it's where the problem starts... - looks like dracut has issues locating/enabling /dev/mapper/centos-root (lv) and as a result it cannot boot to the 'real' root fs (/). - while in dracut shell, I execute the following command sequence: 1. lvm lvchange -ay /dev/centos/root 2. lvm lvchange -ay /dev/centos/swap 3. ln -s /dev/mapper/centos-root /dev/root 4. exit ...and the o/s boots fine...so looks like the pv,vg,lv is detected properly while in initrd, but somehow dracut has difficulties enabling the root,swap LVs ? - While in o/s, I rebuild initrd by using: 'dracut -f -v -a lvm' Note, I have to use '-a lvm' as for some reason, if don't, the lvm utils (lvm,lvm_scan) are not being included to the initrd, not sure why this happens. After rebooting, same thing happens, I have to manually boot the system via dracut shell. I'm a bit stuck at this point, any clues what I'm doing wrong in here ? As I previously said, this is a new installation, so I could simply reinstall the whole thing, but I would rather try to find out some answer to why is this happening ... :-) [curiosity] Some additional details: ================== I've attached /run/initramfs/rdsosreport.txt file [generated while in inird] here: https://privatebin.net/?fdc4052c0c402884#gdB/QYR3IeR55SxUbjfrkZPQfJ7jMxiUxq… o/s ver=CentOS Linux release 7.5.1804 (Core) [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 13G 0 disk ├─sda1 8:1 0 500M 0 part /boot └─sda2 8:2 0 12.5G 0 part ├─centos-root 253:0 0 11.5G 0 lvm / └─centos-swap 253:1 0 1G 0 lvm [SWAP] [root@localhost ~]# cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rd.shell rhgb" GRUB_DISABLE_RECOVERY="true"

4 11

Problem: cannot install the best update candidate for package pki-servlet-engine-1:9.0.30-3.module_el8.5.0+854+e1c92b81.noarch
by Jelle de Jong 01 Oct '23

01 Oct '23

Hello everybody, What might be going wrong here? Is there an upstream bug report? How to proceed? # yum update --refresh CentOS Stream 8 - AppStream 10 kB/s | 4.4 kB 00:00 CentOS Stream 8 - BaseOS 45 kB/s | 3.9 kB 00:00 CentOS Stream 8 - Extras 11 kB/s | 2.9 kB 00:00 CentOS Stream 8 - Extras common packages 57 kB/s | 3.0 kB 00:00 CentOS Stream 8 - PowerTools 19 kB/s | 4.4 kB 00:00 Extra Packages for Enterprise Linux 8 - x86_64 113 kB/s | 32 kB 00:00 Extra Packages for Enterprise Linux 8 - Next - x86_64 422 kB/s | 32 kB 00:00 Error: Problem: cannot install the best update candidate for package pki-servlet-engine-1:9.0.30-3.module_el8.5.0+854+e1c92b81.noarch - both package tomcat-el-3.0-api-1:9.0.62-12.el8.noarch from appstream and tomcat-lib-1:9.0.62-12.el8.noarch from appstream obsolete pki-servlet-engine - package tomcat-jsp-2.3-api-1:9.0.62-12.el8.noarch from appstream requires tomcat-servlet-4.0-api = 1:9.0.62-12.el8, but none of the providers can be installed - package tomcat-lib-1:9.0.62-12.el8.noarch from appstream requires tomcat-servlet-4.0-api = 1:9.0.62-12.el8, but none of the providers can be installed - package tomcat-servlet-4.0-api-1:9.0.62-12.el8.noarch from appstream is filtered out by modular filtering (try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages) Kind regards, Jelle de Jong

2 4

old website keep reappering in /var/www/html
by Marco Fioretti 27 Sep '23

27 Sep '23

Greetings, absurd subject, but I don't know how else I could describe what is happening. I have a small static website hosted on a Centos 7 VPS (that I'll update as soon as possible, but what follows is much more urgent, I must absolutely fix it asap). The website is generated by Hugo. I run hugo on my computer, then rsync everything on the server, in the /var/www/html/hugo/MYWEBSITE folder. Everything worked great for years. This week I rebuilt the whole website almost from scratch, using a different hugo theme and updating many pages. Then I ran rsync, checked the new website in my browser, jumping from page to page, and everything worked as expected: new theme, new content, new menus, everything. 2/3 minutes later, the OLD website reappeared, all of it, as if I had not ran rsync at all. For example, in the new website there is a new subfolder called "bio", that did not exist in the old version. If I ssh to the server, cd to /var/www/html/hugo/MYWEBSITE and run "ls -l" RIGHT AFTER running rsync, I see the "bio" subfolder. If I do "ls -l" 3 minutes later, the "bio" subfolder is no more. I have repeated the rsync process 5/6 times before writing this email, and it's always the same. Every time I rsync, what I uploaded lasts 2/3 minutes, then the WHOLE folder on the server is erased and refilled with the previous full version of the website. It's as if there were some hidden cron job somewhere that runs hugo on the OLD source files, but I can't find it. All the standard methods one can find by googling "how to list all cron jobs" don't show anything that may be the reason. THANKS in advance for any help, Marco

5 5

ThinkPad battery calibration on CentOS 8
by Toralf Lund 12 Sep '23

12 Sep '23

Hi Does anyone know of a way to recalibrate the battery on a ThinkPad laptop under CentOS Stream 8? I did this on the same machine before, but I can't recall exactly how. And maybe I was on CentOS 7 at the time. I know about the "tlp" command, but I haven't had much luck with it so far, as shown here: $ sudo tlp recalibrate BAT1 Setting temporary charge thresholds for BAT1: start = 96 (no change) stop = 100 (no change) Error: battery discharge/recalibrate not available. Also, "tlp-stat" says (after displaying status values etc.) +++ Recommendations * Install acpi_call kernel module for ThinkPad battery recalibration I can't seem to find an easy way to install the module in question, though. I also seem to remember that there was a different tool as well, but I've forgotten its name, and a web search returns little of use... Any ideas? - Toralf

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Discuss September 2023