** Branch linked: lp:ubuntu/precise-proposed/linux-lts-saucy -- 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/1248492
Title: [saucy] [armhf] use pstore to save console log messages Status in “linux” package in Ubuntu: Fix Released Status in “linux” source package in Saucy: Fix Committed Status in “linux” source package in Trusty: Fix Released Bug description: SRU Justification: Impact: on platforms when there's a persistent memory storage (or when ram is not cleared during bootup like on arm), pstore and it's pstore- ram backend can be used to to save log messages on a previously defined and unallocated memory portion. Unfortunately, if we want to save bootup messages, we need the pstore-ram backend to be build in. Fix: apply the attached patch and recompile. Test: e.g., for a 256MB board, bootup a kernel with the following parameters: "mem=128M ramoops.mem_address=0x8000000 ramoops.mem_size=1048576" mem will tell the kernel to use only the first 128MB of ram, while ramoops address and size will the pstore where to find its storage and how big it is. Later on you can retrieve those messages from the u-boot command line dumping that memory region (mdw 0x8000000...) or you can bootup another kernel, mount pstore and retrieve the logs stored there: mount -t pstore - /sys/fs/pstore cp /sys/fs/pstore/dmesg* . -- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1248492/+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
