DRI

Is there any way to disable DRI for an application? Kmail is using DRI and SEGVing in the Nouveau libraries. Not sure how much of this is Kmail bugs and how much is Nouveau (valgrind reports heaps of issues in Kmail and Nouveau triggers kernel bugs). But while investigating this I'd like to have Kmail keep working while not removing DRI entirely from the system. Any suggestions? -- Sent from my Huawei Mate 9 with K-9 Mail.