I know that Cadence, Mentor and Synopsys have ported their tools (IC, LDV, IC-Station, Calibre, Design Compiler, Physical Compiler, etc.). I also know that Laker has been ported to Linux too. I do not know if industry is not willing to support Linux since EDA companies claim to have an incresing interest in it (that is why they moved on in porting their tools to it). As for bugs, two things must be considered. First of all when we speak of Linux we speak of many different distributions. It is very difficult to build products to work bug-free in all of them. Second, initial versions some times have "maturity" bugs.