On Thu, 11 Jul 2019, user...@yahoo.com wrote: > On 7/11/19 8:15 PM, Finn Thain wrote: > > On Thu, 11 Jul 2019, user...@yahoo.com wrote: > > ... > >> > >> Shadowfb has no effect for mach64. > > > > I haven't seen any results that confirm this. Your results seem to > > show that the xorg.conf change was bogus. > > > > Moreover, the X server logs show that the shadow framebuffer was never > > actually enabled for any mach64 test. > > > > So it's an open question. > > ... > > Please see Xorg_sid_mach64.log. > > That file has this line: > > [ 16529.773] (WW) MACH64(0): Cannot shadow an accelerated frame buffer. > > I take that to mean that shadowing can not work for mach64, so it is > explicitly disabled regardless of whether it is specified in an > xorg.conf file (and it must be specified somewhere by default for > mach64, since I didn't use any custom xorg.conf files).
Alternatively, "cannot shadow an accelerated frame buffer" could imply that we need to disable acceleration for mach64. > That same message, and no other message related to shadowing, appears in > the Xorg log regardless of whether shadowfb (or shadow_fb) is set to > "true" or "false" in a custom /etc/X11/xorg.conf file: > But why would the above warning message show up if shadowfb were in fact disabled by xorg.conf? I take the warning to mean that the xorg.conf I provided is bogus. Anyway, I can't offer a config that would enable/disable acceleration or enable/disable shadowed framebuffer, so I'll leave it with Michel to pursue that workaround if he wishes to. --
