You can just leave the GRUB_GFXPAYLOAD_LINUX parameter in place while we do the test, because it will likely be a problem with all the kernels.
Probably the only thing I'd be interested to know from your syslog is whether or not you have any of the 'direct probe' messages. It sounds like this kernel is good though, so I went ahead and started the next build.
You can just leave the GRUB_GFXPAYLOAD _LINUX parameter in place while we do the test, because it will likely be a problem with all the kernels.
Probably the only thing I'd be interested to know from your syslog is whether or not you have any of the 'direct probe' messages. It sounds like this kernel is good though, so I went ahead and started the next build.