This bug is awaiting verification that the linux- aws-5.15/5.15.0-1046.51~20.04.1 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal-linux- aws-5.15' to 'verification-done-focal-linux-aws-5.15'. If the problem still exists, change the tag 'verification-needed-focal-linux-aws-5.15' to 'verification-failed-focal-linux-aws-5.15'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-focal-linux-aws-5.15-v2 verification-needed-focal-linux-aws-5.15 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-6.0 in Ubuntu. https://bugs.launchpad.net/bugs/1998115 Title: Fix iosm: WWAN cannot build the connection (DW5823e) Status in HWE Next: New Status in linux package in Ubuntu: Invalid Status in linux-oem-6.0 package in Ubuntu: Invalid Status in linux source package in Jammy: Fix Released Status in linux-oem-6.0 source package in Jammy: Fix Released Status in linux source package in Kinetic: Fix Released Status in linux-oem-6.0 source package in Kinetic: Invalid Bug description: [Impact] WWAN(DW5823e) can't build the connection successfully. [Fix] With INTEL_IOMMU disable config or by forcing intel_iommu=off from grub some of the features of IOSM driver like browsing, flashing & coredump collection is not working. When driver calls DMA API - dma_map_single() for tx transfers. It is resulting in dma mapping error. Set the device DMA addressing capabilities using dma_set_mask() and remove the INTEL_IOMMU dependency in kconfig so that driver follows the platform config either INTEL_IOMMU enable or disable. Because the generic jammy(5.15) doesn't contain NET_DEVLINK and RELAY CONFIGs yet on iosm module, the single patch is necessary for Jammy. [Test Case] 1. boot up with kernel applied the FIX. 2. check the status of wwan by "mmcli -m 0" Status| unlock retries: sim-pin (3) | state: ^[32mconnected^[0m | power state: on | access tech: lte | signal quality: 45% (recent) ---------------------------------- 3GPP | imei: ###### | enabled locks: sim, fixed-dialing | operator id: 46692 | operator name: Chunghwa Telecom | registration: home | packet service state: attached | pco: | 0: (complete) [Where problems could occur] remove the dependency for intel_iommu, iosm would fit better on other platforms not only Intel. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1998115/+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
