Aha da habe ich:
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--- Real Time Clock
[*] Set system time from RTC on startup and resume
(rtc0) RTC used to set the system time
[ ] RTC debug support
*** RTC interfaces ***
[*] /sys/class/rtc/rtcN (sysfs)
[*] /proc/driver/rtc (procfs for rtc0)
[*] /dev/rtcN (character devices)
[ ] RTC UIE emulation on dev interface
< > Test driver/device
*** I2C RTC drivers ***
< > Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025
< > Dallas/Maxim DS1374
< > Dallas/Maxim DS1672
< > Dallas/Maxim DS3232
< > Maxim MAX6900
< > Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A
< > Intersil ISL1208
< > Intersil ISL12022
< > Xicor/Intersil X1205
< > Philips PCF8563/Epson RTC8564
< > Philips PCF8583
< > ST M41T62/65/M41T80/81/82/83/84/85/87
< > TI BQ32000
< > Seiko Instruments S-35390A
< > Ramtron FM3130
< > Epson RX-8581
< > Epson RX-8025SA/NB
< > EM Microelectronic EM3027
< > Micro Crystal RTC
*** SPI RTC drivers ***
*** Platform RTC drivers ***
<*> PC-style 'CMOS'
< > Dallas DS1286
< > Dallas DS1511
< > Maxim/Dallas DS1553
< > Maxim/Dallas DS1742/1743
< > Simtek STK17TA8
< > ST M48T86/Dallas DS12887
< > ST M48T35
< > ST M48T59/M48T08/M48T02
< > Oki MSM6242
< > TI BQ4802
< > Ricoh RP5C01
< > EM Microelectronic V3020
*** on-CPU RTC drivers ***
Also
kein
menuconfig/help=CONFIG_RTC_INTF_DEV_UIE_EMUL: hat geschrieben: Provides an emulation for RTC_UIE if the underlying rtc chip │
│ driver does not expose RTC_UIE ioctls. Those requests generate │
│ once-per-second update interrupts, used for synchronization. │
│ │
│ The emulation code will read the time from the hardware │
│ clock several times per second, please enable this option │
│ only if you know that you really need it.
Nehme das mal mit rein.
Hintergrund meines penetranten Nachfragen ist das ich zwar Software Audio/Midi als auch mit Soundkarte (RME HDSP 9632) 10 I/O routen keine Probleme habe (==> 0 xruns) aber sobald ich Hardware Midi mit ins Spiel bringe (Soundkarte <--> Opcode 8Port/SE) es xruns gibt (lustigerweise verursacht midisports keine, auch das USB2Midi (Edirol UM-3eX) nicht).
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ls -la /dev/rtc*
lrwxrwxrwx 1 root root 4 7. Dez 17:54 /dev/rtc -> rtc0
crw-rw---- 1 root audio 254, 0 7. Dez 17:54 /dev/rtc0
Welches rtc nehmt ihr? (Tippe mal auf A.))
A.)
or
B.)
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Device drivers --->
Character devices --->
<*> Enhanced Real Time Clock Support (legacy PC RTC driver)
&&
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Device Drivers --->
<*> Sound card support --->
<M> Advanced Linux Sound Architecture --->
<M> RTC Timer support
only works if