Comment 41 for bug 1968155

Perfect! Thanks so much for letting me know :).

  Thanks!
   --S

> On Sep 23, 2022, at 8:37 AM, J.J. Berkhout <email address hidden> wrote:
>
> The problem was (partly) solved.
> After asking for help in the linux kernel development mailing list Niklas Cassel (one of the developers) wrote:
>
> - The commit 1527f69204fe ("ata: ahci: Add Green Sardine vendor ID as board_ahci_mobile") added the - PCI vendor and device id to the list of supported AHCI controllers using the low power board
> - version:
> { PCI_VDEVICE(AMD, 0x7901), board_ahci_low_power }, /* AMD Green Sardine */
>
> - Before the commit in question, your AHCI controller relied on this catch-all entry:
> /* Generic, PCI class code for AHCI */
> { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
> PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
> - which does not enable/allow any low power mode at all.
>
> - Now, I do think that low power modes *should* work with this AHCI controller. Most likely, it is - simply the optical drive that does not work well when the HBA initiates a low power mode on the
> - link.
> .
> .
> .
> - A way do disable lpm is to do:
>
> $ ls -al /sys/class/scsi_host/host*
>
> - Find your device in the list. My device is:
> /sys/class/scsi_host/host13/
>
> - Print the current lpm policy for your device:
> $ cat /sys/class/scsi_host/host13/link_power_management_policy
> med_power_with_dipm
>
> - Anything other than "max_performance" means that you have (a varying degree) of low power modes
> - enabled.
>
> $ sudo sh -c "echo max_performance >
> /sys/class/scsi_host/host13/link_power_management_policy"
>
> $ cat /sys/class/scsi_host/host13/link_power_management_policy
> max_performance
>
> - Try reading from the optical drive after ensuring that the policy is
> "max_performance".
>
> This solved the problem.
> As the kernel parameter to disable lpm only works from kernel 5.18 onwards, I had to find another way to force this setting, so I did:
> $ apt install sysfsutils
> and added in /etc/sysfs.conf the line:
>
> class/scsi_host/host0/link_power_management_policy = max_performance
>
> As long as I don't mess around with my hardware, the host number should stay the same.
> Of course, if anyone uses this method, he/she should find out his host number for the controller of the optical drive in question and substitute it in the hostnn part.
>
> A definite solution will probably be a future patch in libata.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1968155
>
> Title:
> Multiple errors with DVD drive: ata1: SError: { PHYRdyChg CommWake
> 10B8B DevExch }
>
> Status in linux package in Ubuntu:
> Confirmed
>
> Bug description:
> Going from kernel version 5.4.0-99 to 5.4.0-100 my optical drive (Pioneer BD-RW BDR-207M) became unusable. I include a selection of the errors, the dmesg errors immediately after boot without trying to use the drive yet, the system specs from system report, and the output of the inxi -Fdxxx commandin the file attachment.txt.
> Up to and including kernel 5.4.0-99 everything worked OK. Kernel 5.13.0-30 also works, from kernel 5.13.0-35 the same problem occurs. Might it be a problem with atalib?
> ---
> ProblemType: Bug
> ApportVersion: 2.20.11-0ubuntu27.21
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: jaap 1928 F.... pulseaudio
> /dev/snd/controlC1: jaap 1928 F.... pulseaudio
> CasperMD5CheckResult: skip
> CurrentDesktop: X-Cinnamon
> DistroRelease: Linux Mint 20.3
> InstallationDate: Installed on 2022-02-01 (64 days ago)
> InstallationMedia: Linux Mint 20.3 "Una" - Release amd64 20220104
> MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
> NonfreeKernelModules: nvidia_modeset nvidia
> Package: linux (not installed)
> ProcFB: 0 EFI VGA
> ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-100-generic root=UUID=9d60bcb5-650d-484d-ae74-728526cd6db1 ro ipv6.disable=1 elevator=deadline quiet splash nomodeset
> ProcVersionSignature: Ubuntu 5.4.0-100.113-generic 5.4.166
> RelatedPackageVersions:
> linux-restricted-modules-5.4.0-100-generic N/A
> linux-backports-modules-5.4.0-100-generic N/A
> linux-firmware 1.187.29
> RfKill:
> 0: phy0: Wireless LAN
> Soft blocked: yes
> Hard blocked: yes
> Tags: una
> Uname: Linux 5.4.0-100-generic x86_64
> UpgradeStatus: No upgrade log present (probably fresh install)
> UserGroups: adm cdrom dip disk lpadmin plugdev sambashare sudo systemd-timesync vboxusers
> _MarkForUpload: True
> dmi.bios.date: 12/01/2020
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: P3.80
> dmi.board.name: X570 Taichi
> dmi.board.vendor: ASRock
> dmi.chassis.asset.tag: To Be Filled By O.E.M.
> dmi.chassis.type: 3
> dmi.chassis.vendor: To Be Filled By O.E.M.
> dmi.chassis.version: To Be Filled By O.E.M.
> dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.80:bd12/01/2020:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX570Taichi:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
> dmi.product.family: To Be Filled By O.E.M.
> dmi.product.name: To Be Filled By O.E.M.
> dmi.product.sku: To Be Filled By O.E.M.
> dmi.product.version: To Be Filled By O.E.M.
> dmi.sys.vendor: To Be Filled By O.E.M.
> ---
> ProblemType: Bug
> ApportVersion: 2.20.11-0ubuntu27.21
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: jaap 1928 F.... pulseaudio
> /dev/snd/controlC1: jaap 1928 F.... pulseaudio
> CasperMD5CheckResult: skip
> CurrentDesktop: X-Cinnamon
> DistroRelease: Linux Mint 20.3
> InstallationDate: Installed on 2022-02-01 (64 days ago)
> InstallationMedia: Linux Mint 20.3 "Una" - Release amd64 20220104
> MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
> NonfreeKernelModules: nvidia_modeset nvidia
> Package: linux (not installed)
> ProcFB: 0 EFI VGA
> ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-100-generic root=UUID=9d60bcb5-650d-484d-ae74-728526cd6db1 ro ipv6.disable=1 elevator=deadline quiet splash nomodeset
> ProcVersionSignature: Ubuntu 5.4.0-100.113-generic 5.4.166
> RelatedPackageVersions:
> linux-restricted-modules-5.4.0-100-generic N/A
> linux-backports-modules-5.4.0-100-generic N/A
> linux-firmware 1.187.29
> RfKill:
> 0: phy0: Wireless LAN
> Soft blocked: yes
> Hard blocked: yes
> Tags: una
> Uname: Linux 5.4.0-100-generic x86_64
> UpgradeStatus: No upgrade log present (probably fresh install)
> UserGroups: adm cdrom dip disk lpadmin plugdev sambashare sudo systemd-timesync vboxusers
> _MarkForUpload: True
> dmi.bios.date: 12/01/2020
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: P3.80
> dmi.board.name: X570 Taichi
> dmi.board.vendor: ASRock
> dmi.chassis.asset.tag: To Be Filled By O.E.M.
> dmi.chassis.type: 3
> dmi.chassis.vendor: To Be Filled By O.E.M.
> dmi.chassis.version: To Be Filled By O.E.M.
> dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.80:bd12/01/2020:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX570Taichi:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
> dmi.product.family: To Be Filled By O.E.M.
> dmi.product.name: To Be Filled By O.E.M.
> dmi.product.sku: To Be Filled By O.E.M.
> dmi.product.version: To Be Filled By O.E.M.
> dmi.sys.vendor: To Be Filled By O.E.M.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1968155/+subscriptions
>