Pontus Gråskæg, thank you for taking the time to report this bug and helping to make Ubuntu better.
Please execute the following command, as it will automatically gather debugging information, in a terminal: apport-collect 1715861 ** Package changed: linux-hwe (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Tags removed: dma error irq r592 ** Tags added: regression-potential -- 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/1715861 Title: r592 & r852 IRQ: DMA errors cause excessive log file entries Status in linux package in Ubuntu: Incomplete Bug description: Issue on a newly installed Lubuntu 16.04.3 with 'apt upgrade' freshly applied. -- /var/log/syslog and /var/log/kern.log grow to 100s of MiB in less than a day. -- Typical excessive syslog entry is attached (hostname redacted). I am not making hardware changes at the times these entries are made. Entires are of the form: Sep 7 20:05:55 <hostname> kernel: [14098.011547] r592: IRQ: card added Sep 7 20:05:55 <hostname> kernel: [14098.011548] r592: IRQ: DMA error followed by 38 lines of trace information Note that the kernel reports itself as tainted. This is due to a previous kernel warning issued during the boot-up, which I believe to be unrelated - kern.log extract (hostname redacted) of warning and taint also attached. The laptop reports itself as having the problematic Ricoh devices. Relevant hwinfo attached. grepped extract follows Model: "Ricoh R5C832 IEEE 1394 Controller" Vendor: pci 0x1180 "Ricoh Co Ltd" Model: "Ricoh xD-Picture Card Controller" Vendor: pci 0x1180 "Ricoh Co Ltd" Model: "Ricoh R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter" Vendor: pci 0x1180 "Ricoh Co Ltd" Model: "Ricoh R5C592 Memory Stick Bus Host Adapter" Vendor: pci 0x1180 "Ricoh Co Ltd" Workaround is blacklisting devices by adding the following lines at the end of /etc/modprobe.d/blacklist.conf # Stop errors filling up log - see # https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1530187 # Blacklist Ricoh card reader blacklist r592 blacklist r852 This stops messages from appearing in /var/log/kern.log and /var/log/syslog. The Ricoh cardreader built into the laptop still reads SD cards after such blacklisting. (lsb_release -rd output is Description: Ubuntu 16.04.3 LTS Release: 16.04 graaskaeg ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.10.0-33-generic 4.10.0-33.37~16.04.1 ProcVersionSignature: Ubuntu 4.10.0-33.37~16.04.1-generic 4.10.17 Uname: Linux 4.10.0-33-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 Date: Fri Sep 8 13:30:06 2017 InstallationDate: Installed on 2017-09-05 (3 days ago) InstallationMedia: Lubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) SourcePackage: linux-hwe UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1715861/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp