This bug was fixed in the package linux-oem-5.6 - 5.6.0-1023.23
---------------
linux-oem-5.6 (5.6.0-1023.23) focal; urgency=medium
* focal/linux-oem-5.6: 5.6.0-1023.23 -proposed tracker (LP: #1892465)
* CVE-2020-15852
- x86/ioperm: Fix io bitmap invalidation on Xen PV
* Fix non-working USB devices plugged during system sleep (LP: #1892678)
- xhci: Do warm-reset when both CAS and XDEV_RESUME are set
* ASPM not enabled on child devices behind VMD controller (LP: #1889384)
- SAUCE: PCI/ASPM: Enable ASPM for links under VMD domain
* Fix non-working Goodix touchpad after system sleep (LP: #1891998)
- HID: i2c-hid: Always sleep 60ms after I2C_HID_PWR_ON commands
* [SRU] Fix acpi backlight issue on some thinkpads (LP: #1892010)
- platform/x86: thinkpad_acpi: not loading brightness_init when _BCL invalid
* Packaging resync (LP: #1786013)
- [Packaging] update helper scripts
-- Timo Aaltonen <[email protected]> Tue, 25 Aug 2020
08:46:08 +0300
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-15852
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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:
Fix Released
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Fix Committed
Status in linux-oem-5.6 source package in Focal:
Fix Released
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.
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