On Fri, Mar 29, 2013 at 2:07 AM, Chris Wilson <chris at chris-wilson.co.uk> wrote: > On Fri, Mar 29, 2013 at 01:54:37PM +0800, Daniel Kurtz wrote: >> According to the opengl glx_sync_control spec, the Unadjusted System Time >> (or UST) is a 64-bit monotonically increasing counter that is available >> throughout the system: >> http://www.opengl.org/registry/specs/OML/glx_sync_control.txt >> >> Therefore, sending 0, even in this corner case, is out of spec. >> Instead, just return FALSE indicating that the operation could not be >> completed. > > The problem is that ends up sending BadDrawable back to the client, > which ends up killing many clients and a compositor or two due to the > unexpected error. > > Would you prefer querying pipe 0 in this case for the UST? For us it comes down to the fact that we'd like something monotonous. So yes querying pipe 0 could work if it's enabled. But I wonder what do you do when you have no enabled pipe though? Return the last UST? St?phane
