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| -rw-r--r-- | util/dell-flash-unlock/README.md | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/util/dell-flash-unlock/README.md b/util/dell-flash-unlock/README.md index fee2f20b..f46394bf 100644 --- a/util/dell-flash-unlock/README.md +++ b/util/dell-flash-unlock/README.md @@ -8,10 +8,26 @@ E6400, which mainly seem to be the Latitude and Precision lines starting from around 2008 (E6400 era). ## TL;DR -On Linux, ensure you are booting with the `iomem=relaxed` kernel parameter. -On OpenBSD, ensure you are booting with securelevel set to -1. -Run `make` to compile the utility, and then run `sudo ./dell_flash_unlock` and -follow the directions it outputs. + +### Linux specific +- On Linux, ensure you are booting with the `iomem=relaxed` kernel parameter. +- If you get a "Function not implemented" error, ensure that your kernel has + "CONFIG_X86_IOPL_IOPERM" set to "y". Here are several common locations for + the config and how to check them: + - `zcat /proc/config.gz | grep IOPL` + - `grep IOPL /boot/config` + - `grep IOPL /boot/config-$(uname -r)` + If it says it is not set, then you will need to install or compile a kernel + with that option set. + +### OpenBSD +- On OpenBSD, ensure you are booting with securelevel set to -1. + +### General +Make sure an AC adapter is plugged into your system + +Run `make` to compile the utility, and then run `./dell_flash_unlock` with +root/superuser permissions and follow the directions it outputs. ## Confirmed supported devices - Latitude E6400, E6500 |