Package: initramfs-tools Version: 0.98.8 Severity: normal Tags: patch User: ubuntu-de...@lists.ubuntu.com Usertags: origin-ubuntu ubuntu-patch natty
We had a rather obscure Ubuntu bug (https://bugs.launchpad.net/bugs/728611) which presented as Plymouth not being able to display text at boot time, which of course is nasty in cases where the user needs to answer a prompt in order for boot to complete. This turned out to be restricted to configurations where Plymouth is built into the initramfs, so I chased this down. The problem is that /lib/plymouth/label.so now transitively links to libGL, which (on Ubuntu, at least) lives in /usr/lib/mesa/libGL.so.1 or some other subdirectory of /usr/lib depending on the GL implementation in use (fglrx, nvidia, etc.). This directory isn't on the linker's default search path; instead, it relies on /etc/ld.so.cache having been built appropriately from a configuration including /etc/ld.so.conf.d/GL.conf, which is managed by update-alternatives. The thing that's going wrong here is that /usr/lib/mesa/libGL.so.1 is copied into the initramfs, but it isn't on the linker's search path so /lib/plymouth/label.so fails to load. I looked at fixing this by copying in /etc/ld.so.conf* and running ldconfig, but this turned out to be very difficult due to the way mkinitramfs symlinks libraries during initramfs creation, and I ended up giving this up as infeasible for the time being. I think it's better to have copy_exec check whether the target directory name is only on the linker search path by virtue of /etc/ld.so.conf*, and if so, install to /lib or /usr/lib as appropriate instead. I don't know whether you'll want to take this patch exactly, or refine it, or do something else entirely; but I've tried to make it relatively safe and it may be worth it for robustness even if you aren't running into this problem in Debian right now. * If copy_exec finds libraries to copy which are only accessible to the runtime linker by virtue of being listed in /etc/ld.so.conf*, then install those libraries to /lib or /usr/lib as appropriate instead (LP: #728611). === modified file 'hook-functions' --- hook-functions 2011-02-09 18:05:28 +0000 +++ hook-functions 2011-03-26 00:44:38 +0000 @@ -151,6 +151,21 @@ copy_exec() { libname=$(basename "${x}") dirname=$(dirname "${x}") + # Avoid installing to directories which require ld.so.conf + # in order to work. (Running ldconfig over the initramfs + # would be better, but the way we symlink libraries during + # creation stymies that.) + if grep -qsx "${dirname}" /etc/ld.so.conf /etc/ld.so.conf.d/*; then + case ${dirname} in + /usr/lib/*) + dirname=/usr/lib + ;; + /lib/*) + dirname=/lib + ;; + esac + fi + # FIXME inst_lib mkdir -p "${DESTDIR}/${dirname}" if [ ! -e "${DESTDIR}/${dirname}/${libname}" ]; then Thanks, -- Colin Watson [cjwat...@ubuntu.com] -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110326011258.ge9...@riva.ucam.org
