78 Resolving Other Installation Problems The most likely (Web site construction)
78 Resolving Other Installation Problems The most likely cause of a signal 11 error during installation is a hardware error related to memory or the cache associated with the CPU (microprocessor). Signal 11, also known as SIGSEGV (short for Segment Violation Signal), can occur in other Linux applications. A segment violation occurs when a process tries to access a memory location that it s not supposed to access. The operating system catches the problem before it happens and stops the offending process by sending it a signal 11. When that happens during installation, it means the installer made an error while accessing memory, and the most likely reason is some hardware problem. A commonly suggested cure for the signal 11 problem is to turn off the CPU cache in the BIOS. To do so, you have to enter SETUP while the PC boots (by pressing a function key such as F2) and then turn off the CPU cache from the BIOS setup menu. If the problem is due to a hardware error in memory (in other words, the result of bad memory chips), you could try swapping the memory modules around in their slots. You may also consider replacing an existing memory module with another memory module, if you have one handy. You can read more about the signal 11 problem at www.bitwizard.nl/sig11. Using Linux kernel boot options When you boot the PC for Linux installation, either from the DVD or the first CD-ROM, you get a text screen with the boot: prompt. Typically, you press Enter at that prompt or do nothing and the installation begins shortly. You can, however, specify quite a variety of options at the boot: prompt. The options control various aspects of the Linux kernel startup, such as disabling support for troublesome hardware or starting the X server using a specific X driver module. Some of these boot options can be helpful in bypassing problems that you may encounter during installation. To use these boot options, typically you type linux followed by the boot options. For example, to perform text mode installation and tell the kernel that your PC has 256MB of memory, you type the following at the boot: prompt: linux text mem=256M Consult Table 3-3 for a brief summary of some of the Linux boot options. You can use these commands to turn certain features on or off. Although I mention these Linux kernel boot commands in the context of troubleshooting installation problems, you can use many of these commands anytime you boot a PC with any Linux distribution and you want to turn specific features on or off.
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