https://bugzilla.novell.com/show_bug.cgi?id=857464 https://bugzilla.novell.com/show_bug.cgi?id=857464#c0 Summary: grub2 and memmap cause kernel hang Classification: openSUSE Product: openSUSE 13.1 Version: Final Platform: x86-64 OS/Version: openSUSE 13.1 Status: NEW Severity: Critical Priority: P5 - None Component: Bootloader AssignedTo: jsrain@suse.com ReportedBy: piny@gmx.com QAContact: jsrain@suse.com Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0 Issue: Using the kernel parameter memmap with grub2 boot loader causes kernel hang during boot. The systems freezes directly after issuing [CODE] Loading initial ramdisk ... [/CODE] Cause: The root cause is that the "$" character needs to be escaped even in /boot/grub2/grub.cfg. Multiple escaping is necessary when using the "official" configuration files due to several bash sourcing and $-sign "interpretations". This is documented e.g. in * http://forums.fedoraforum.org/showthread.php?t=285588 * https://groups.google.com/forum/#!msg/jailhouse-dev/sttVUtTYLlk/ax2CrrAUMtwJ Note: This error is very hard to detect and I spend "a lot of time" chasing a non existent graphics issue (KVM, nomodeset, etc). Eventually, trying to install a fresh OS12.3 (this bug applies here too!) and fiddling with a very specific "vga=0x0361" setting, the screen switched mode and displayed [CODE] PANIC: early exception 08 rip 246:10 error 8158c98c cr2 0 [/CODE] This error message does not appear "usually"! Chasing this error message (e.g. [SOLVED] PANIC: early exception 08 rip 246:10 after upgrading from 2 to 4GB RAM) I finally tracked it down to the "$-escaping" issue. To do: Escape the $-sign in all grub2 configurati files acc. * http://forums.fedoraforum.org/showthread.php?t=285588 * https://groups.google.com/forum/#!msg/jailhouse-dev/sttVUtTYLlk/ax2CrrAUMtwJ Reproducible: Always Steps to Reproduce: 1. Insert kernel boot parameter memmap=64K$0K into /boot/grub2/grub.cfg 2. Boot Actual Results: Boot process hangs with last message "Loading initial ramdisk ..." Expected Results: System booting successfully This error is hard to detect! All info available directs towards graphics issues! This is reproduced with a fresh, minimum install (text mode) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.