Difference between revisions of "RPi Bugs"
m (→Hardware: changed link formatting) |
(→Hardware: Clarified audio click event) |
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* The current R-Pi firmware limits users to 2 hubs and 14 ports. | * The current R-Pi firmware limits users to 2 hubs and 14 ports. | ||
* Some Hardware is unsupported [[RPi_VerifiedPeripherals|link]] | * Some Hardware is unsupported [[RPi_VerifiedPeripherals|link]] | ||
− | * The sound output | + | * The analog sound output chip suffers from a clicking problem when it awakes from sleep. |
+ | : This is caused by the quiet signal sitting at half rail when the chip is active and the signal | ||
+ | : sitting at ground when the chip is asleep. During the wake/sleep process the analog output is rapidly | ||
+ | : driven between these two levels causing an annoying, but not damaging, click. | ||
+ | : Recent versions of software drivers have accounted for this problem by being far less aggressive in putting | ||
+ | : the audio DAC to sleep. | ||
= Software = | = Software = |
Revision as of 20:40, 24 April 2013
See R-Pi_Troubleshooting for problems that are not bugs.
Contents
Hardware
- The current R-Pi firmware limits users to 2 hubs and 14 ports.
- Some Hardware is unsupported link
- The analog sound output chip suffers from a clicking problem when it awakes from sleep.
- This is caused by the quiet signal sitting at half rail when the chip is active and the signal
- sitting at ground when the chip is asleep. During the wake/sleep process the analog output is rapidly
- driven between these two levels causing an annoying, but not damaging, click.
- Recent versions of software drivers have accounted for this problem by being far less aggressive in putting
- the audio DAC to sleep.
Software
(excluding non-official distribution specific bugs)
OS
Kernel
- tracked on github
Firmware
- tracked on github
- 73 threads on kevent 2 may have been dropped (possible solution)
- 55 threads on error -71 (see the Rpi_USB_check-list)
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