This bug was fixed in the package linux-oem-5.6 - 5.6.0-1028.28
---------------
linux-oem-5.6 (5.6.0-1028.28) focal; urgency=medium
* focal/linux-oem-5.6: 5.6.0-1028.28 -proposed tracker (LP: #1894630)
* Cannot probe sata disk on sata controller behind VMD: ata1.00: failed to
IDENTIFY (I/O error, err_mask=0x4) (LP: #1894778)
- SAUCE: PCI: vmd: Add AHCI to fast interrupt list
* SRU: Fix system hang when stress S3 on radeon with TTM (LP: #1893609)
- mei: bus: don't clean driver pointer
* Packaging resync (LP: #1786013)
- [Packaging] update helper scripts
- update dkms package versions
* Introduce the new NVIDIA 450-server and the 450 UDA series (LP: #1887674)
- [packaging] add signed modules for the 450 nvidia driver
* CVE-2020-12888
- vfio/type1: Support faulting PFNMAP vmas
- vfio-pci: Fault mmaps to enable vma tracking
- vfio-pci: Invalidate mmaps and block MMIO access on disabled memory
* Missing id 8086:a0bc for VMD quirk PCI_DEV_FLAGS_ENABLE_ASPM (LP: #1893194)
- SAUCE: PCI/ASPM: VMD: add ASPM quirk for 8086:a0bc
* The DP/HDMI audio via USB-C to DP dongle or Dell Zeus adapter can't work
after suspend (LP: #1893290)
- ALSA: hda/hdmi: always check pin power status in i915 pin fixup
* Comet Lake PCH-H RAID not support on Ubuntu20.04 (LP: #1892288)
- ahci: Add Intel Comet Lake PCH-H PCI ID
* device doesn't boot with kernel older than v5.7.7 on a usb key: hang at
efi_tpm_eventlog_init (LP: #1892827)
- efi/tpm: Verify event log header before parsing
-- Timo Aaltonen <[email protected]> Tue, 08 Sep 2020
11:40:14 +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=2020-12888
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https://bugs.launchpad.net/bugs/1894778
Title:
Cannot probe sata disk on sata controller behind VMD: ata1.00: failed
to IDENTIFY (I/O error, err_mask=0x4)
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux source package in Focal:
In Progress
Status in linux-oem-5.6 source package in Focal:
Fix Released
Status in linux source package in Groovy:
In Progress
Status in linux-oem-5.6 source package in Groovy:
Invalid
Bug description:
[SRU Justification]
[Impact]
When booting with a certain platforms with boot disk attached to SATA
bus behind Intel VMD controller, disk probing may fail with following
error messages left in dmesg:
[ 6.163286] ata1.00: qc timeout (cmd 0xec)
[ 6.165630] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[Fix]
Proposed kernel patch https://patchwork.kernel.org/patch/11758345/
[Test Case]
Check dmesg/lsblk for disk probe.
For pci MSI address, check lspci output:
$ lspci -vvnn
....
Capabilities: [80] MSI: Enable+ Count=1/1 maskable- 64bit-
Address: fee00000 Data: 0000
When it fails, the address is fee00000. And with a patched kernel:
$ lspci -vvnn
....
Capabilities: [80] MSI: Enable+ Count=1/1 maskable- 64bit-
Address: fee01000 Data: 0000
[Regression Potential]
Low. For previous NVMe based platforms, this patch brings no effective
change for NVMe devices because they will still stay in fast-interrupt
list.
========== Original Bug Description ==========
When booting with root filesystem on sata disks under Intel VMD mode,
following errors printed in dmesg and no disk is found, nor booting
into it:
[ 6.163286] ata1.00: qc timeout (cmd 0xec)
[ 6.165630] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[ 6.483649] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 16.659284] ata1.00: qc timeout (cmd 0xec)
[ 16.661717] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[ 16.663161] ata1: limiting SATA link speed to 1.5 Gbps
[ 16.983890] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
[ 48.147294] ata1.00: qc timeout (cmd 0xec)
[ 48.149737] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[ 48.467889] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
$ lspci
...
10000:e0:17.0 SATA controller: Intel Corporation Device a0d3 (rev 20)
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