i had issues using TinyCore 4.x on Neoware ThinClient. 3.x ran fine, but new cpufreq feature in the base install causing problem for me. (freeze)
I could resolve that by adding longhaul.disable=1 to the bootparams, but i`m not sure if others will easily find this post or workaround. I also reported that upstream and longhaul module is considered to be a candidate for being marked as broken again - Dave Miller needs to decide. btw, blacklist=longhaul did not work, i`m curious, isn`t that param especially for such case?
There is a suggestion at http://forum.tinycorelinux.net/index.php?topic=12788.new;topicseen#new
to move the longhaul module into a separate tzc. I don´t know how many people using longhaul actively and successfully.
What about adding a "safe mode" feature as boot option, like other distros typically offer (acpi=off, noapic, edd=off, no cpufreq etc) ? That would at least make troubleshooting easier....