Sound works on one -rc1 and not the other

[Adrian M. <ad...@ne...>]

Sound on the Dreamcast works on Linus's -rc1 but not Paul's.

(On fact both play simple sounds via cat sound.wav > /dev/dsp but Paul's
won't play mp3s - seemingly racing through them at about 150% speed -
without any out - in a way that suggests some problem with the DMA or
IRQs)

Here's the diff between the configs at present - any clues?

adrian@bossclass:~$ diff -u ./linux-2.6/.config ./lethal-source/.config
--- ./linux-2.6/.config 2007-07-24 00:03:28.000000000 +0100
+++ ./lethal-source/.config     2007-07-24 22:43:27.000000000 +0100
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.23-rc1
-# Tue Jul 24 00:00:22 2007
+# Tue Jul 24 22:43:27 2007
 #
 CONFIG_SUPERH=y
 CONFIG_RWSEM_GENERIC_SPINLOCK=y
@@ -25,6 +25,7 @@
 #
 CONFIG_EXPERIMENTAL=y
 CONFIG_BROKEN_ON_SMP=y
+CONFIG_LOCK_KERNEL=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 
 #
@@ -203,18 +204,16 @@
 # CPU Frequency scaling
 #
 CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_TABLE=y
 # CONFIG_CPU_FREQ_DEBUG is not set
-CONFIG_CPU_FREQ_STAT=y
-# CONFIG_CPU_FREQ_STAT_DETAILS is not set
+# CONFIG_CPU_FREQ_STAT is not set
 # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
 CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
-# CONFIG_CPU_FREQ_GOV_PERFORMANCE is not set
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 CONFIG_CPU_FREQ_GOV_POWERSAVE=y
 CONFIG_CPU_FREQ_GOV_USERSPACE=y
 # CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
 # CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
-CONFIG_SH_CPU_FREQ=y
+# CONFIG_SH_CPU_FREQ is not set
 
 #
 # DMA support
@@ -246,8 +245,9 @@
 # CONFIG_KEXEC is not set
 # CONFIG_CRASH_DUMP is not set
 # CONFIG_PREEMPT_NONE is not set
-CONFIG_PREEMPT_VOLUNTARY=y
-# CONFIG_PREEMPT is not set
+# CONFIG_PREEMPT_VOLUNTARY is not set
+CONFIG_PREEMPT=y
+CONFIG_PREEMPT_BKL=y
 
 #
 # Boot options
@@ -256,7 +256,7 @@
 CONFIG_BOOT_LINK_OFFSET=0x00800000
 # CONFIG_UBC_WAKEUP is not set
 CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=fb0 panic=3 root=/dev/nfs rw
nfsaddrs=192.168.61.55:192.168.61.50:192.168.61.50: earlyprintk=serial
video=pvr2fb:640x480-16@60"
+CONFIG_CMDLINE="console=ttySC1,115200 panic=3 root=/dev/nfs rw
nfsaddrs=192.168.61.55:192.168.61.50:192.168.61.50: earlyprintk=serial"
 
 #
 # Bus options
@@ -385,7 +385,11 @@
 # CONFIG_BLK_DEV_RAM is not set
 # CONFIG_CDROM_PKTCDVD is not set
 # CONFIG_ATA_OVER_ETH is not set
-# CONFIG_MISC_DEVICES is not set
+CONFIG_MISC_DEVICES=y
+# CONFIG_PHANTOM is not set
+# CONFIG_EEPROM_93CX6 is not set
+# CONFIG_SGI_IOC4 is not set
+# CONFIG_TIFM_CORE is not set
 # CONFIG_IDE is not set
 
 #
@@ -505,6 +509,7 @@
 CONFIG_INPUT_MOUSE=y
 # CONFIG_MOUSE_PS2 is not set
 # CONFIG_MOUSE_SERIAL is not set
+# CONFIG_MOUSE_APPLETOUCH is not set
 # CONFIG_MOUSE_VSXXXAA is not set
 # CONFIG_INPUT_JOYSTICK is not set
 # CONFIG_INPUT_TABLET is not set
@@ -604,9 +609,9 @@
 #
 # CONFIG_DISPLAY_SUPPORT is not set
 # CONFIG_VGASTATE is not set
-CONFIG_VIDEO_OUTPUT_CONTROL=m
+CONFIG_VIDEO_OUTPUT_CONTROL=y
 CONFIG_FB=y
-CONFIG_FIRMWARE_EDID=y
+# CONFIG_FIRMWARE_EDID is not set
 # CONFIG_FB_DDC is not set
 CONFIG_FB_CFB_FILLRECT=y
 CONFIG_FB_CFB_COPYAREA=y
@@ -658,9 +663,17 @@
 CONFIG_FRAMEBUFFER_CONSOLE=y
 # CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set
 # CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
-# CONFIG_FONTS is not set
+CONFIG_FONTS=y
 CONFIG_FONT_8x8=y
 CONFIG_FONT_8x16=y
+# CONFIG_FONT_6x11 is not set
+# CONFIG_FONT_7x14 is not set
+# CONFIG_FONT_PEARL_8x8 is not set
+CONFIG_FONT_ACORN_8x8=y
+# CONFIG_FONT_MINI_4x6 is not set
+# CONFIG_FONT_SUN8x16 is not set
+# CONFIG_FONT_SUN12x22 is not set
+# CONFIG_FONT_10x18 is not set
 CONFIG_LOGO=y
 # CONFIG_LOGO_LINUX_MONO is not set
 # CONFIG_LOGO_LINUX_VGA16 is not set
@@ -680,21 +693,25 @@
 CONFIG_SND=m
 CONFIG_SND_TIMER=m
 CONFIG_SND_PCM=m
-# CONFIG_SND_SEQUENCER is not set
+CONFIG_SND_SEQUENCER=m
+# CONFIG_SND_SEQ_DUMMY is not set
 CONFIG_SND_OSSEMUL=y
 CONFIG_SND_MIXER_OSS=m
 CONFIG_SND_PCM_OSS=m
-CONFIG_SND_PCM_OSS_PLUGINS=y
+# CONFIG_SND_PCM_OSS_PLUGINS is not set
+CONFIG_SND_SEQUENCER_OSS=y
 # CONFIG_SND_DYNAMIC_MINORS is not set
-CONFIG_SND_SUPPORT_OLD_API=y
-CONFIG_SND_VERBOSE_PROCFS=y
-# CONFIG_SND_VERBOSE_PRINTK is not set
-# CONFIG_SND_DEBUG is not set
+# CONFIG_SND_SUPPORT_OLD_API is not set
+# CONFIG_SND_VERBOSE_PROCFS is not set
+CONFIG_SND_VERBOSE_PRINTK=y
+CONFIG_SND_DEBUG=y
+CONFIG_SND_DEBUG_DETECT=y
 
 #
 # Generic devices
 #
 # CONFIG_SND_DUMMY is not set
+# CONFIG_SND_VIRMIDI is not set
 # CONFIG_SND_MTPAV is not set
 # CONFIG_SND_SERIAL_U16550 is not set
 # CONFIG_SND_MPU401 is not set
@@ -776,8 +793,23 @@
 # Open Sound System
 #
 # CONFIG_SOUND_PRIME is not set
-# CONFIG_HID_SUPPORT is not set
-# CONFIG_USB_SUPPORT is not set
+CONFIG_HID_SUPPORT=y
+CONFIG_HID=y
+# CONFIG_HID_DEBUG is not set
+CONFIG_USB_SUPPORT=y
+CONFIG_USB_ARCH_HAS_HCD=y
+CONFIG_USB_ARCH_HAS_OHCI=y
+CONFIG_USB_ARCH_HAS_EHCI=y
+# CONFIG_USB is not set
+
+#
+# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
+#
+
+#
+# USB Gadget Support
+#
+# CONFIG_USB_GADGET is not set
 # CONFIG_MMC is not set
 # CONFIG_NEW_LEDS is not set
 # CONFIG_INFINIBAND is not set
@@ -819,7 +851,8 @@
 # CONFIG_OCFS2_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_ROMFS_FS is not set
-# CONFIG_INOTIFY is not set
+CONFIG_INOTIFY=y
+CONFIG_INOTIFY_USER=y
 # CONFIG_QUOTA is not set
 # CONFIG_DNOTIFY is not set
 # CONFIG_AUTOFS_FS is not set
@@ -877,7 +910,7 @@
 CONFIG_NFS_V3=y
 CONFIG_NFS_V3_ACL=y
 CONFIG_NFS_V4=y
-# CONFIG_NFS_DIRECTIO is not set
+CONFIG_NFS_DIRECTIO=y
 # CONFIG_NFSD is not set
 CONFIG_ROOT_NFS=y
 CONFIG_LOCKD=y
@@ -926,7 +959,7 @@
 # CONFIG_MAGIC_SYSRQ is not set
 # CONFIG_UNUSED_SYMBOLS is not set
 # CONFIG_DEBUG_FS is not set
-CONFIG_HEADERS_CHECK=y
+# CONFIG_HEADERS_CHECK is not set
 # CONFIG_DEBUG_KERNEL is not set
 # CONFIG_DEBUG_BUGVERBOSE is not set
 # CONFIG_SH_STANDARD_BIOS is not set