![]() The only real difference I could spot a missing line during initialization (?) of the card. Nothing helped, so I compared the dmesg of both systems. We tried a lot of stuff in the wild (from random google hits where problems with the renesas card were solved), like autosuspend off, kernel updates, different Ubuntu versions etc. Here's the link to the Server (not working): Here's the link to the ThinkCentre where it's working: Both are using the same OS (Ubuntu 18.04, Kernel 5.4.0-97-generic). Trying the Card with Renesas chips, it is working perfectly on a ThinkCentre pc but not on the target hardware, a Supermicro Server. The ASMedia did work on no tested PC in combination with the camera). Googeling for some hours shows, that ASMedia chip seems to have some firmware bugs or whatever, so we dropped the idea of using that card. ![]() Usb devices like external SSD drives are usable (with high transferrates), but when using a camera, it stops after a few frames with some DMA error. The problem: The ASMedia Card is partly working. So we tried two different card types: ASMedia xy and Renesas uPD720202, where market is dominated by ASMedia and it was really hard to get a few of the Renesas cards. Situation: We want to use USB Vision cameras with USB adapter cards, providing as much bandwidth as possible. Problem with 4x USB controller PCIE cards seems to be not correctly installed.
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