Public bug reported: [Impact] AMD Radeon Pro W5700 doesn't work at all, driver failed to probe the device due to IOMMU error. [Fix] Disable PCI ATS for the device.
[Test] After applying the patch, there's no more IOMMU error, and the driver can correctly probe the device. The grahpics also works great. [Regression Potential] Low. amdgpu is known to work well with ATS disabled. In addition to that, AMD confirmed it's the correct fix for this card, so the chance to break anything is rather low. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-5.6 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Focal) Importance: Critical Status: Confirmed ** Affects: linux-oem-5.6 (Ubuntu Focal) Importance: Critical Status: Confirmed ** Tags: oem-priority originate-from-1887609 sutton ** Also affects: linux-oem-5.6 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux-oem-5.6 (Ubuntu Focal) Importance: Undecided Status: New ** Changed in: linux-oem-5.6 (Ubuntu Focal) Status: New => Confirmed ** Changed in: linux (Ubuntu Focal) Status: New => Confirmed ** Changed in: linux (Ubuntu Focal) Importance: Undecided => Critical ** Changed in: linux-oem-5.6 (Ubuntu Focal) Importance: Undecided => Critical ** Changed in: linux (Ubuntu) Status: New => Invalid ** Changed in: linux-oem-5.6 (Ubuntu) Status: New => Invalid ** Tags added: oem-priority originate-from-1887609 sutton -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1890306 Title: Fix IOMMU error on AMD Radeon Pro W5700 Status in HWE Next: New Status in linux package in Ubuntu: Invalid Status in linux-oem-5.6 package in Ubuntu: Invalid Status in linux source package in Focal: Confirmed Status in linux-oem-5.6 source package in Focal: Confirmed Bug description: [Impact] AMD Radeon Pro W5700 doesn't work at all, driver failed to probe the device due to IOMMU error. [Fix] Disable PCI ATS for the device. [Test] After applying the patch, there's no more IOMMU error, and the driver can correctly probe the device. The grahpics also works great. [Regression Potential] Low. amdgpu is known to work well with ATS disabled. In addition to that, AMD confirmed it's the correct fix for this card, so the chance to break anything is rather low. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1890306/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp