pl2303 serial adapter not recognized

Hello,
Maybe your PL2303 is using another chip,
can you please upload the dmesg output with this device attached?
Also the output of the following command with it connected:

lsusb -v

And in case you're using a PL2303GS chip, here is a test kernel:
https://people.canonical.com/~phlin/kernel/pl2303gs/

Which includes:
https://github.com/torvalds/linux/commit/5b6ab28d06780c87320ceade61698bb6719c85db

Thanks

Hi @cypressyew. Sorry to take so long to get back to you.

> Maybe your PL2303 is using another chip,
> can you please upload the dmesg output with this device attached?
> Also the output of the following command with it connected:
>
> lsusb -v

I've attached a file with the output.

> And in case you're using a PL2303GS chip, here is a test kernel:
> https://people.canonical.com/~phlin/kernel/pl2303gs/

I tried this, and unfortunately it doesn't work.

# uname -a
Linux GAU233333LD04 5.13.0-41-generic #46~20.04.1+lp1967493 SMP Tue Apr 12 04:38:49 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

# journalctl -b -k -g pl2303 -o cat
usbcore: registered new interface driver pl2303
usbserial: USB Serial support registered for pl2303
pl2303 1-12:1.0: pl2303 converter detected
pl2303 1-12:1.0: unknown device type, please report to <email address hidden>

Hi,
thanks for testing this out,
from the attachment it looks like your pl2303 does not work with the new device detection algorithm in 5.13 kernel:

https://kernel.ubuntu.com/git/ubuntu/ubuntu-impish.git/tree/drivers/usb/serial/pl2303.c#n421
Which can only handle devices with bcdUSB 1.10 and 2.00

However yours is 1.01:
Bus 001 Device 004: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 1.01
  bDeviceClass 0
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 64
  idVendor 0x067b Prolific Technology, Inc.
  idProduct 0x2303 PL2303 Serial Port
  bcdDevice 3.00

I would suggest you to give the latest mainline kernel [1] a try to see if this issue exist with the latest kernel, you will find instructions here [2].

If the issue still exist, please report this issue to <email address hidden>, indicating the kernel version and attach the lsusb -v output for this device.

Thanks!

[1] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.18-rc5/
[2] https://wiki.ubuntu.com/Kernel/MainlineBuilds#How_do_I_install_an_upstream_kernel.3F

> If the issue still exist, please report this issue to <email address hidden>, indicating the kernel version and attach the lsusb -v output for this device.

Done: https://lore.kernel.org<email address hidden>/T/#u

A patch for this has been merged into Linus's tree and it has been back ported to the LTS kernels.

https://github.com/torvalds/linux/commit/e82e7c6dde91acd6748d672a44dc1980ce239f86

Please can this patch be included into the Ubuntu kernels.

Hello,
thanks for the bug report,
I have built some test kernels with this patch:
https://people.canonical.com/~phlin/kernel/lp-1967493-pl2303/

Can you give them a try? Thank you.

The kernel version for F-5.13 should be:
5.13.0-47-generic #52~20.04.1+lp1967493

Thanks.

I've tested on the test kernel, and it's working perfectly - Thanks!

# uname -a
Linux GAU233333LD12 5.13.0-47-generic #52~20.04.1+lp1967493 SMP Mon Jun 6 06:43:52 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Thanks for the test! I will SRU this to our kernel.

https://lists.ubuntu.com/archives/kernel-team/2022-June/130942.html

This bug is awaiting verification that the linux-oem-5.17/5.17.0-1012.13 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-jammy' to 'verification-done-jammy'. If the problem still exists, change the tag 'verification-needed-jammy' to 'verification-failed-jammy'.

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!

This bug is awaiting verification that the linux-oem-5.14/5.14.0-1043.48 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' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

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!

Hello Gary van der Merwe (garyvdm),

would you mind to help us to verify this fix with the proposed kernel as mentioned above?

Thanks in advance.

Hi

I assume this hasn't landed in the focal hwe kernel yet.

# uname -a
Linux GAU233333LD12 5.13.0-51-generic #58~20.04.1-Ubuntu SMP Tue Jun 14 11:29:12 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

# journalctl -b -k -g 2303 -o cat
usb 3-3: New USB device found, idVendor=067b, idProduct=2303, bcdDevice= 3.00
usbcore: registered new interface driver pl2303
usbserial: USB Serial support registered for pl2303
pl2303 3-3:1.0: pl2303 converter detected
pl2303 3-3:1.0: unknown device type, please report to <email address hidden>

I'll test tomorrow on Jammy. (Need go in to the office to get a usb onto the test machine.)

Oh sorry,
the bot is asking for the OEM kernel
  * linux-oem-5.17/5.17.0-1012.13 on jammy
  * linux-oem-5.14/5.14.0-1043.48 on focal

which can be installed with:
  * sudo apt install linux-oem-20.04
  * sudo apt install linux-oem-22.04

Respectively with -proposed enabled.

It's working with linux-oem-20.04 5.14.0-1044-oem

# uname -a
Linux GAU233333LD12 5.14.0-1044-oem #49-Ubuntu SMP Mon Jun 27 12:26:11 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

# journalctl -b -k -g 2303 -o cat
usb 3-3: New USB device found, idVendor=067b, idProduct=2303, bcdDevice= 3.00
usbcore: registered new interface driver pl2303
usbserial: USB Serial support registered for pl2303
pl2303 3-3:1.0: pl2303 converter detected
usb 3-3: pl2303 converter now attached to ttyUSB0
pl2303 ttyUSB0: error sending break = -32
pl2303 ttyUSB0: error sending break = -32

This bug was fixed in the package linux-oem-5.14 - 5.14.0-1044.49

---------------
linux-oem-5.14 (5.14.0-1044.49) focal; urgency=medium

  * focal/linux-oem-5.14: 5.14.0-1044.49 -proposed tracker (LP: #1979813)

  * Fix hp_wmi_read_int() reporting error (0x05) (LP: #1979051)
    - platform/x86: hp-wmi: Fix hp_wmi_read_int() reporting error (0x05)

  * Miscellaneous upstream changes
    - Revert "drm/i915/display: Enable PSR2 selective fetch by default"
    - Revert "drm/i915/display/adlp: Allow PSR2 to be enabled"
    - Revert "drm/i915/display/adlp: Optimize PSR2 power-savings in corner cases"
    - Revert "drm/i915/display: Fix glitches when moving cursor with PSR2
      selective fetch enabled"
    - Revert "drm/i915/display: Handle frontbuffer rendering when PSR2 selective
      fetch is enabled"
    - Revert "drm/i915/display: Drop unnecessary frontbuffer flushes"
    - Revert "drm/i915/display/psr: Do full fetch when handling multi-planar
      formats"
    - Revert "drm/i915/display/psr: Handle plane and pipe restrictions at every
      page flip"
    - Revert "drm/i915/display: Drop PSR support from HSW and BDW"
    - Revert "drm/i915: Nuke ORIGIN_GTT"
    - Revert "drm/i915/display: Fix sel fetch plane offset calculation"

linux-oem-5.14 (5.14.0-1043.48) focal; urgency=medium

  * focal/linux-oem-5.14: 5.14.0-1043.48 -proposed tracker (LP: #1978667)

  * [SRU][OEM-5.14/OEM-5.17][PATCH 0/1] Fix oled brightness set above frame-
    average luminance on AMD (LP: #1978986)
    - SAUCE: drm/amd/display: Cap OLED brightness per max frame-average luminance

  * Fix headset mic no sound on an HP desktop (LP: #1978925)
    - ALSA: hda/realtek - ALC897 headset MIC no sound

  * alsa/hda: mute led can't work on the lenovo machine with cs35l41 s-codec
    (LP: #1978915)
    - ALSA: hda/realtek: Fix mute led issue on thinkpad with cs35l41 s-codec

  * CVE-2022-21123 // CVE-2022-21125 // CVE-2022-21166
    - Documentation: Add documentation for Processor MMIO Stale Data
    - x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug
    - x86/speculation: Add a common function for MD_CLEAR mitigation update
    - x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data
    - x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations
    - x86/speculation/mmio: Enable CPU Fill buffer clearing on idle
    - x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data
    - x86/speculation/srbds: Update SRBDS mitigation selection
    - x86/speculation/mmio: Reuse SRBDS mitigation for SBDS
    - KVM: x86/speculation: Disable Fill buffer clear within guests
    - x86/speculation/mmio: Print SMT warning

  * pl2303 serial adapter not recognized (LP: #1967493)
    - USB: serial: pl2303: fix type detection for odd device

  * Fix screen flickering caused by PSR on Intel TGL platform (LP: #1978252)
    - drm/i915/display: Fix sel fetch plane offset calculation
    - drm/i915: Nuke ORIGIN_GTT
    - drm/i915/display: Drop PSR support from HSW and BDW
    - drm/i915/display/psr: Handle plane and pipe restrictions at every page flip
    - drm/i915/display/psr: Do full fetch when handling multi-planar formats
    - drm/i915/displ...

This bug was fixed in the package linux-oem-5.17 - 5.17.0-1012.13

---------------
linux-oem-5.17 (5.17.0-1012.13) jammy; urgency=medium

  * jammy/linux-oem-5.17: 5.17.0-1012.13 -proposed tracker (LP: #1978578)

  * [SRU][OEM-5.14/OEM-5.17][PATCH 0/1] Fix oled brightness set above frame-
    average luminance on AMD (LP: #1978986)
    - SAUCE: drm/amd/display: Cap OLED brightness per max frame-average luminance

  * Fix headset mic no sound on an HP desktop (LP: #1978925)
    - ALSA: hda/realtek - ALC897 headset MIC no sound

  * [SRU][Jammy/OEM-5.17][PATCH 0/1] Fix calltrace in mac80211 (LP: #1978297)
    - mac80211: fix struct ieee80211_tx_info size

  * pl2303 serial adapter not recognized (LP: #1967493)
    - USB: serial: pl2303: fix type detection for odd device

  * Fix can't boot up after change to vmd (LP: #1976587)
    - PCI: vmd: Assign VMD IRQ domain before enumeration
    - PCI: vmd: Revert 2565e5b69c44 ("PCI: vmd: Do not disable MSI-X remapping if
      interrupt remapping is enabled by IOMMU.")

  * Power cycle USB ports on shutdown/reboot (LP: #1976503)
    - SAUCE: xhci: turn off port power in shutdown

  * Fix sub-optimal I210 network speed (LP: #1976438)
    - SAUCE: igb: Make DMA faster when CPU is active on the PCIe link

  * Remove SAUCE patches from test_vxlan_under_vrf.sh in net of
    ubuntu_kernel_selftests (LP: #1975691)
    - Revert "UBUNTU: SAUCE: selftests: net: Don't fail test_vxlan_under_vrf on
      xfail"
    - Revert "UBUNTU: SAUCE: selftests: net: Make test for VXLAN underlay in non-
      default VRF an expected failure"

  * [SRU][OEM-5.14/OEM-5.17/Jammy][PATCH 0/1] Fix i915 calltrace on new ADL BIOS
    (LP: #1976214)
    - drm/i915: update new TMDS clock setting defined by VBT

  * [SRU][OEM-5.14/OEM-5.17/J][PATCH 0/2] Fix system hangs after s2idle on AMD
    A+A GPU (LP: #1975804)
    - drm/amd: Don't reset dGPUs if the system is going to s2idle

  * [SRU][OEM-5.14/OEM-5.17/J][PATCH 0/1] Read the discovery registers for
    AMD_SFH (LP: #1975798)
    - HID: amd_sfh: Add support for sensor discovery

 -- Chia-Lin Kao (AceLan) <email address hidden> Fri, 17 Jun 2022 15:36:34 +0800

This has landed in Kinetic Ubuntu-5.19.0-9.9

This bug was fixed in the package linux - 5.15.0-41.44

---------------
linux (5.15.0-41.44) jammy; urgency=medium

  * jammy/linux: 5.15.0-41.44 -proposed tracker (LP: #1979448)

  * Fix can't boot up after change to vmd (LP: #1976587)
    - PCI: vmd: Assign VMD IRQ domain before enumeration
    - PCI: vmd: Revert 2565e5b69c44 ("PCI: vmd: Do not disable MSI-X remapping if
      interrupt remapping is enabled by IOMMU.")

  * [SRU][Jammy/OEM-5.17][PATCH 0/1] Fix calltrace in mac80211 (LP: #1978297)
    - mac80211: fix struct ieee80211_tx_info size

  * [SRU][Jammy][PATCH 0/1] Fix amd display corruption on s2idle resume
    (LP: #1978244)
    - drm/amd/display: Don't reinitialize DMCUB on s0ix resume

  * pl2303 serial adapter not recognized (LP: #1967493)
    - USB: serial: pl2303: fix type detection for odd device

  * Remove SAUCE patches from test_vxlan_under_vrf.sh in net of
    ubuntu_kernel_selftests (LP: #1975691)
    - Revert "UBUNTU: SAUCE: selftests: net: Don't fail test_vxlan_under_vrf on
      xfail"
    - Revert "UBUNTU: SAUCE: selftests: net: Make test for VXLAN underlay in non-
      default VRF an expected failure"

  * Fix hp_wmi_read_int() reporting error (0x05) (LP: #1979051)
    - platform/x86: hp-wmi: Fix hp_wmi_read_int() reporting error (0x05)

  * Request to back port vmci patches to Ubuntu kernel (LP: #1978145)
    - VMCI: dma dg: whitespace formatting change for vmci register defines
    - VMCI: dma dg: add MMIO access to registers
    - VMCI: dma dg: detect DMA datagram capability
    - VMCI: dma dg: set OS page size
    - VMCI: dma dg: register dummy IRQ handlers for DMA datagrams
    - VMCI: dma dg: allocate send and receive buffers for DMA datagrams
    - VMCI: dma dg: add support for DMA datagrams sends
    - VMCI: dma dg: add support for DMA datagrams receive
    - VMCI: Fix some error handling paths in vmci_guest_probe_device()
    - VMCI: Release notification_bitmap in error path
    - VMCI: Check exclusive_vectors when freeing interrupt 1
    - VMCI: Add support for ARM64
    - [Config] Update policies for VMWARE_VMCI and VMWARE_VMCI_VSOCKETS

  * [UBUNTU 20.04] rcu stalls with many storage key guests (LP: #1975582)
    - s390/gmap: voluntarily schedule during key setting
    - s390/mm: use non-quiescing sske for KVM switch to keyed guest

  * [SRU][OEM-5.14/OEM-5.17/Jammy][PATCH 0/1] Fix i915 calltrace on new ADL BIOS
    (LP: #1976214)
    - drm/i915: update new TMDS clock setting defined by VBT

  * Revert PPC get_user workaround (LP: #1976248)
    - powerpc: Export mmu_feature_keys[] as non-GPL

  * Jammy update: v5.15.39 upstream stable release (LP: #1978240)
    - MIPS: Fix CP0 counter erratum detection for R4k CPUs
    - parisc: Merge model and model name into one line in /proc/cpuinfo
    - ALSA: hda/realtek: Add quirk for Yoga Duet 7 13ITL6 speakers
    - ALSA: fireworks: fix wrong return count shorter than expected by 4 bytes
    - mmc: sdhci-msm: Reset GCC_SDCC_BCR register for SDHC
    - mmc: sunxi-mmc: Fix DMA descriptors allocated above 32 bits
    - mmc: core: Set HS clock speed before sending HS CMD13
    - gpiolib: of: fix bounds check for 'gpio-reserved-ranges'
    - x86/fpu: Prevent FPU s...