<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing" href="https://bugs.freedesktop.org/show_bug.cgi?id=91880#c149">Comment # 149</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing" href="https://bugs.freedesktop.org/show_bug.cgi?id=91880">bug 91880</a> from <a class="email" href="mailto:edisonalvarez@arnet.com.ar" title="alvarex <edisonalvarez@arnet.com.ar>"> alvarex</a> <pre>I forgot to mention I had a similar problem on Windows also with a 260x on the same motherboard so I think in my case is something to do with the motherboard. I tried modyfing some option in grub but that did't help, I added iommu=pt acpi_osi=Linux acpi=force acpi_enforce_resources=lax acpi_osi='!Windows 2013' acpi_osi='!Windows The iommu table is bugged on this motherboard maybe it has something todo? If I disable iommu completely on the bios usb devices will not power up.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>