Another Dell AIO backlight issue

Bug #1863880 reported by AceLan Kao on 2020-02-19
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Undecided
Unassigned
Bionic
Undecided
Unassigned
Eoan
Undecided
Unassigned
Focal
Undecided
Unassigned
linux-oem-osp1 (Ubuntu)
Undecided
Unassigned
Bionic
Undecided
Unassigned

Bug Description

[Impact]
The scalar which control the backlight sometimes doesn't respond the first command, so driver can't determinate whether this scalar is in charge of the backlight.

[Fix]
Move the retry block not only to read the response, but also includes write command, so that it re-send the command, too.

[Test]
Verified on the buggy Dell AIO, it passes 30 times and should be more reliable.

[Regression Potential]
Low, there is no code flow change, just move the retry block to include both write and read command.

CVE References

AceLan Kao (acelankao) on 2020-02-19
no longer affects: linux-oem-osp1 (Ubuntu Eoan)

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1863880

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Changed in linux (Ubuntu Bionic):
status: New → Incomplete
AceLan Kao (acelankao) on 2020-02-19
no longer affects: linux-oem-osp1 (Ubuntu Focal)
Timo Aaltonen (tjaalton) on 2020-02-20
Changed in linux-oem-osp1 (Ubuntu Bionic):
status: New → Fix Committed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-oem-osp1 - 5.0.0-1040.45

---------------
linux-oem-osp1 (5.0.0-1040.45) bionic; urgency=medium

  * bionic/linux-oem-osp1: 5.0.0-1040.45 -proposed tracker (LP: #1863996)

  * Another Dell AIO backlight issue (LP: #1863880)
    - SAUCE: platform/x86: dell-uart-backlight: move retry block

 -- Timo Aaltonen <email address hidden> Thu, 20 Feb 2020 09:23:58 +0200

Changed in linux-oem-osp1 (Ubuntu Bionic):
status: Fix Committed → Fix Released
Timo Aaltonen (tjaalton) on 2020-02-24
Changed in linux-oem-osp1 (Ubuntu):
status: New → Invalid
Changed in linux (Ubuntu Bionic):
status: Incomplete → Fix Committed
Changed in linux (Ubuntu Eoan):
status: New → Fix Committed

The patch "UBUNTU: SAUCE: platform/x86: dell-uart-backlight: move retry block" has been removed from bionic/linux.

Changed in linux (Ubuntu Bionic):
status: Fix Committed → Confirmed

This bug is awaiting verification that the 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!

tags: added: verification-needed-focal
Launchpad Janitor (janitor) wrote :
Download full text (81.5 KiB)

This bug was fixed in the package linux - 5.4.0-18.22

---------------
linux (5.4.0-18.22) focal; urgency=medium

  * focal/linux: 5.4.0-18.22 -proposed tracker (LP: #1866488)

  * Packaging resync (LP: #1786013)
    - [Packaging] resync getabis
    - [Packaging] update helper scripts

  * Add sysfs attribute to show remapped NVMe (LP: #1863621)
    - SAUCE: ata: ahci: Add sysfs attribute to show remapped NVMe device count

  * [20.04 FEAT] Compression improvements in Linux kernel (LP: #1830208)
    - lib/zlib: add s390 hardware support for kernel zlib_deflate
    - s390/boot: rename HEAP_SIZE due to name collision
    - lib/zlib: add s390 hardware support for kernel zlib_inflate
    - s390/boot: add dfltcc= kernel command line parameter
    - lib/zlib: add zlib_deflate_dfltcc_enabled() function
    - btrfs: use larger zlib buffer for s390 hardware compression
    - [Config] Introducing s390x specific kernel config option CONFIG_ZLIB_DFLTCC

  * [UBUNTU 20.04] s390x/pci: increase CONFIG_PCI_NR_FUNCTIONS to 512 in kernel
    config (LP: #1866056)
    - [Config] Increase CONFIG_PCI_NR_FUNCTIONS from 64 to 512 starting with focal
      on s390x

  * CONFIG_IP_MROUTE_MULTIPLE_TABLES is not set (LP: #1865332)
    - [Config] CONFIG_IP_MROUTE_MULTIPLE_TABLES=y

  * Dell XPS 13 9300 Intel 1650S wifi [34f0:1651] fails to load firmware
    (LP: #1865962)
    - iwlwifi: remove IWL_DEVICE_22560/IWL_DEVICE_FAMILY_22560
    - iwlwifi: 22000: fix some indentation
    - iwlwifi: pcie: rx: use rxq queue_size instead of constant
    - iwlwifi: allocate more receive buffers for HE devices
    - iwlwifi: remove some outdated iwl22000 configurations
    - iwlwifi: assume the driver_data is a trans_cfg, but allow full cfg

  * [FOCAL][REGRESSION] Intel Gen 9 brightness cannot be controlled
    (LP: #1861521)
    - Revert "USUNTU: SAUCE: drm/i915: Force DPCD backlight mode on Dell Precision
      4K sku"
    - Revert "UBUNTU: SAUCE: drm/i915: Force DPCD backlight mode on X1 Extreme 2nd
      Gen 4K AMOLED panel"
    - SAUCE: drm/dp: Introduce EDID-based quirks
    - SAUCE: drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED
      panel
    - SAUCE: drm/i915: Force DPCD backlight mode for some Dell CML 2020 panels

  * [20.04 FEAT] Enable proper kprobes on ftrace support (LP: #1865858)
    - s390/ftrace: save traced function caller
    - s390: support KPROBES_ON_FTRACE

  * alsa/sof: load different firmware on different platforms (LP: #1857409)
    - ASoC: SOF: Intel: hda: use fallback for firmware name
    - ASoC: Intel: acpi-match: split CNL tables in three
    - ASoC: SOF: Intel: Fix CFL and CML FW nocodec binary names.

  * [UBUNTU 20.04] Enable CONFIG_NET_SWITCHDEV in kernel config for s390x
    starting with focal (LP: #1865452)
    - [Config] Enable CONFIG_NET_SWITCHDEV in kernel config for s390x starting
      with focal

  * Focal update: v5.4.24 upstream stable release (LP: #1866333)
    - io_uring: grab ->fs as part of async offload
    - EDAC: skx_common: downgrade message importance on missing PCI device
    - net: dsa: b53: Ensure the default VID is untagged
    - net: fib_rules: Correctly set table field when table number exceeds 8 bit...

Changed in linux (Ubuntu Focal):
status: Incomplete → Fix Released

This bug is awaiting verification that the 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-eoan' to 'verification-done-eoan'. If the problem still exists, change the tag 'verification-needed-eoan' to 'verification-failed-eoan'.

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: verification-needed-eoan
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-oem-osp1 - 5.0.0-1043.48

---------------
linux-oem-osp1 (5.0.0-1043.48) bionic; urgency=medium

  * bionic/linux-oem-osp1: 5.0.0-1043.48 -proposed tracker (LP: #1867111)

  * All PS/2 ports on PS/2 Serial add-in bracket are not working after S3
    (LP: #1866734)
    - SAUCE: Input: i8042 - Fix the selftest retry logic

  * r8152 init may take up to 40 seconds at initialization with Dell WD19/WD19DC
    during hotplug (LP: #1864284)
    - UBUNTU SAUCE: r8151: check disconnect status after long sleep

  * Miscellaneous Ubuntu changes
    - [Config] Bump the GCC version

 -- Timo Aaltonen <email address hidden> Thu, 12 Mar 2020 11:14:40 +0200

Changed in linux-oem-osp1 (Ubuntu):
status: Invalid → Fix Released
Launchpad Janitor (janitor) wrote :
Download full text (49.1 KiB)

This bug was fixed in the package linux - 5.3.0-46.38

---------------
linux (5.3.0-46.38) eoan; urgency=medium

  * eoan/linux: 5.3.0-43.36 -proposed tracker (LP: #1867301)

  * Fix AMD Stoney Ridge screen flickering under 4K resolution (LP: #1864005)
    - iommu/amd: Disable IOMMU on Stoney Ridge systems

  * Allow BPF tracing under lockdown (LP: #1868626)
    - Revert "UBUNTU: SAUCE: (efi-lockdown) Lock down kprobes"
    - Revert "bpf: Restrict bpf when kernel lockdown is in confidentiality mode"

  * Missing wireless network interface after kernel 5.3.0-43 upgrade with eoan
    (LP: #1868442)
    - iwlwifi: mvm: Do not require PHY_SKU NVM section for 3168 devices

  * Packaging resync (LP: #1786013)
    - [Packaging] resync getabis
    - [Packaging] update helper scripts

  * iSCSI-target: Deleting a LUN hangs in the kernel (LP: #1862682)
    - scsi: Revert "target/core: Inline transport_lun_remove_cmd()"

  * Stop using get_scalar_status command in Dell AIO uart backlight driver
    (LP: #1865402)
    - SAUCE: platform/x86: dell-uart-backlight: add get_display_mode command

  * Eoan update: upstream stable patchset 2020-03-11 (LP: #1867051)
    - Revert "drm/sun4i: dsi: Change the start delay calculation"
    - ovl: fix lseek overflow on 32bit
    - kernel/module: Fix memleak in module_add_modinfo_attrs()
    - media: iguanair: fix endpoint sanity check
    - ocfs2: fix oops when writing cloned file
    - x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR
    - udf: Allow writing to 'Rewritable' partitions
    - printk: fix exclusive_console replaying
    - iwlwifi: mvm: fix NVM check for 3168 devices
    - sparc32: fix struct ipc64_perm type definition
    - cls_rsvp: fix rsvp_policy
    - gtp: use __GFP_NOWARN to avoid memalloc warning
    - l2tp: Allow duplicate session creation with UDP
    - net: hsr: fix possible NULL deref in hsr_handle_frame()
    - net_sched: fix an OOB access in cls_tcindex
    - net: stmmac: Delete txtimer in suspend()
    - bnxt_en: Fix TC queue mapping.
    - tcp: clear tp->total_retrans in tcp_disconnect()
    - tcp: clear tp->delivered in tcp_disconnect()
    - tcp: clear tp->data_segs{in|out} in tcp_disconnect()
    - tcp: clear tp->segs_{in|out} in tcp_disconnect()
    - rxrpc: Fix use-after-free in rxrpc_put_local()
    - rxrpc: Fix insufficient receive notification generation
    - rxrpc: Fix missing active use pinning of rxrpc_local object
    - rxrpc: Fix NULL pointer deref due to call->conn being cleared on disconnect
    - media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors
    - mfd: dln2: More sanity checking for endpoints
    - ipc/msg.c: consolidate all xxxctl_down() functions
    - tracing: Fix sched switch start/stop refcount racy updates
    - rcu: Avoid data-race in rcu_gp_fqs_check_wake()
    - brcmfmac: Fix memory leak in brcmf_usbdev_qinit
    - usb: typec: tcpci: mask event interrupts when remove driver
    - usb: gadget: legacy: set max_speed to super-speed
    - usb: gadget: f_ncm: Use atomic_t to track in-flight request
    - usb: gadget: f_ecm: Use atomic_t to track in-flight request
    - ALSA: usb-audio: Fix endianess in descriptor validatio...

Changed in linux (Ubuntu Eoan):
status: Fix Committed → Fix Released
To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers