Comment 5 for bug 1852510

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Dave Jones (waveform) wrote : Re: IO errors when writing large amounts of data to USB storage in eoan on RPI

Some additional notes from testing last night (more or less blindly after a load of googling for dwc_otg errors and mitigations):

* Adding dwc_otg.speed=1 (limiting the driver speed to Full Speed USB1.1), fixes the mass-storage issue, but breaks compatibility with most keyboards. So, not terribly useful as a work-around but may be helpful in debugging?

* All other attempts either yielded no difference or just broke things further; did have a quick play with the various DMA options (e.g. dma_enable) on the basis of your notes above but managed no improvement.