Patch-ID# 101247-01 Keywords: LX, performance, audio, speakerbox Synopsis: SunOS 4.1.3C: Performance degradations on SPARCstation-LX without speaker box Date: Sep/08/93 Solaris Release: 1.1C SunOS Release: 4.1.3C Unbundled Product: Unbundled Release: Topic: Performance degradations on SPARCstation-LX without speaker box BugId's fixed with this patch: 1136828 1136856 Architectures for which this patch is available: sun4m Patches which may conflict with this patch: Obsoleted by: 4.1.3_U1 Files included with this patch: dbri_mmcodec.o dbri_subr.o Problem Description: When no speaker box is plugged into a SPARCstation-LX, a high dbri interrupt load occurs (~3000/sec). This load can cause a fairly dramatic impact on system performance (~25% loss). The dbri chip is initialized with the wrong sbus burst size causing the driver to display an error/warning message. Install Instructions: (1) Save the original version of dbri_mmcodec.o and dbri_subr.o. mv /sys/sun4m/OBJ/dbri_mmcodec.o /sys/sun4m/OBJ/dbri_mmcodec.o.FCS mv /sys/sun4m/OBJ/dbri_subr.o /sys/sun4m/OBJ/dbri_subr.o.FCS (2) Copy the patched file to the OBJ directory cp 413c/sun4m/dbri_mmcodec.o /sys/sun4m/OBJ/dbri_mmcodec.o cp 413c/sun4m/dbri_subr.o /sys/sun4m/OBJ/dbri_subr.o (3) build, install, and boot a new kernel. Please refer to the System and Network Administration Manual.