Display abnormal on the TGL+4k panel machines

[Hui Wang]

[Impact]
On the TGL machines, if the panel is 4k resolution and the i915 driver
is in PSR2 mode, the display will be abnormal randomly and the
keyboard reponse is delayed randomly.

[Fix]
We reported this issue to Intel and Lenovo shipped a machine to Intel
developer, they reproduced the issue and they provided a workaroud
patch.

[Test]
Booting the system with patched kernel, open 10+ terminal windows,
move those windows or resize those windows for 10 mins, the display
is good. Open a terminal and press 1, 2, 3 and 4 keys rapidly and
repeatedly, the 1, 2, 3, 4 is showed on the terminal immediately,
there is no delay between pressing and showing.

[Where problems could occur]
After applying these patches, the DC3 clock off mode is disabled
unconditionally on the TGL+PSR2 machines, this could introduce
power consumption regression. But we tested the patched kernel on
different TGL lenovo machines, all power_management test cases passed.

[Hui Wang (hui.wang)]

Verified the proposed kernel fixed the oem bugs.

thx.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.10 - 5.10.0-1021.22

---------------
linux-oem-5.10 (5.10.0-1021.22) focal; urgency=medium

  * focal/linux-oem-5.10: 5.10.0-1021.22 -proposed tracker (LP: #1922921)

  * Display abnormal on the TGL+4k panel machines (LP: #1922885)
    - drm/i915/display: Do not allow DC3CO if PSR SF is enabled
    - SAUCE: drm/i915/display/psr: Disable DC3CO when the PSR2 is used

  * Fix mic on P620 after S3 resume (LP: #1921757)
    - ALSA: usb-audio: Carve out connector value checking into a helper
    - ALSA: usb-audio: Check connector value on resume

 -- Timo Aaltonen <email address hidden> Wed, 07 Apr 2021 18:07:55 +0300

[radsaq (radsaq)]

This issue also affects my Dell XPS 13 (9310) with a 1080p panel and was driving me bonkers until I realized it was a linux 5.10+ issue and went back to using 5.8. Let me know if there's anything I can do to help with further testing.

[Hui Wang (hui.wang)]

@radsaq,

Is the Dell XPS 13 (9310) a tigerlake machine? Please file a new bug and run apport-collect $bug_number to upload the log.

thx.

[Timo Aaltonen (tjaalton)]

could you send this for hirsute too?

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

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 1922885

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.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

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-hirsute' to 'verification-done-hirsute'. If the problem still exists, change the tag 'verification-needed-hirsute' to 'verification-failed-hirsute'.

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!

[Hui Wang (hui.wang)]

Installed the proposed kernel on a lenovo TGL with 4k panel, the issue is fixed.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.11.0-20.21+21.10.1

---------------
linux (5.11.0-20.21+21.10.1) impish; urgency=medium

  * impish/linux: 5.11.0-20.21+21.10.1 -proposed tracker (LP: #1930056)

  * Packaging resync (LP: #1786013)
    - update dkms package versions

  [ Ubuntu: 5.11.0-20.21 ]

  * hirsute/linux: 5.11.0-20.21 -proposed tracker (LP: #1930854)
  * ath11k WIFI not working in proposed kernel 5.11.0-19-generic (LP: #1930637)
    - bus: mhi: core: Download AMSS image from appropriate function

  [ Ubuntu: 5.11.0-19.20 ]

  * hirsute/linux: 5.11.0-19.20 -proposed tracker (LP: #1930075)
  * Packaging resync (LP: #1786013)
    - update dkms package versions
  * CVE-2021-33200
    - bpf: Wrap aux data inside bpf_sanitize_info container
    - bpf: Fix mask direction swap upon off reg sign change
    - bpf: No need to simulate speculative domain for immediates
  * AX201 BT will cause system could not enter S0i3 (LP: #1928047)
    - SAUCE: drm/i915: Tweaked Wa_14010685332 for all PCHs
  * CVE-2021-3490
    - SAUCE: Revert "UBUNTU: SAUCE: bpf: verifier: fix ALU32 bounds tracking with
      bitwise ops"
    - gpf: Fix alu32 const subreg bound tracking on bitwise operations
  * CVE-2021-3489
    - SAUCE: Revert "UBUNTU: SAUCE: bpf: prevent writable memory-mapping of read-
      only ringbuf pages"
    - bpf: Prevent writable memory-mapping of read-only ringbuf pages
  * Select correct boot VGA when BIOS doesn't do it properly (LP: #1929217)
    - vgaarb: Use ACPI HID name to find integrated GPU
  * Realtek USB hubs in Dell WD19SC/DC/TB fail to work after exiting s2idle
    (LP: #1928242)
    - USB: Verify the port status when timeout happens during port suspend
  * CVE-2020-26145
    - ath10k: drop fragments with multicast DA for SDIO
    - ath10k: add CCMP PN replay protection for fragmented frames for PCIe
    - ath10k: drop fragments with multicast DA for PCIe
  * CVE-2020-26141
    - ath10k: Fix TKIP Michael MIC verification for PCIe
  * CVE-2020-24587
    - ath11k: Clear the fragment cache during key install
  * CVE-2020-24588
    - mac80211: properly handle A-MSDUs that start with an RFC 1042 header
    - cfg80211: mitigate A-MSDU aggregation attacks
    - mac80211: drop A-MSDUs on old ciphers
    - ath10k: drop MPDU which has discard flag set by firmware for SDIO
  * CVE-2020-26139
    - mac80211: do not accept/forward invalid EAPOL frames
  * CVE-2020-24586 // CVE-2020-24587 // CVE-2020-24587 for such cases.
    - mac80211: extend protection against mixed key and fragment cache attacks
  * CVE-2020-24586 // CVE-2020-24587
    - mac80211: prevent mixed key and fragment cache attacks
    - mac80211: add fragment cache to sta_info
    - mac80211: check defrag PN against current frame
    - mac80211: prevent attacks on TKIP/WEP as well
  * CVE-2020-26147
    - mac80211: assure all fragments are encrypted
  * raid10: Block discard is very slow, causing severe delays for mkfs and
    fstrim operations (LP: #1896578)
    - md: add md_submit_discard_bio() for submitting discard bio
    - md/raid10: extend r10bio devs to raid disks
    - md/raid10: pull the code that wait for blocked dev into one function
    - md/raid10: improve ra...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.11.0-22.23

---------------
linux (5.11.0-22.23) hirsute; urgency=medium

  * UAF on CAN J1939 j1939_can_recv (LP: #1932209)
    - SAUCE: can: j1939: delay release of j1939_priv after synchronize_rcu

  * UAF on CAN BCM bcm_rx_handler (LP: #1931855)
    - SAUCE: can: bcm: delay release of struct bcm_op after synchronize_rcu

linux (5.11.0-20.21) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-20.21 -proposed tracker (LP: #1930854)

  * ath11k WIFI not working in proposed kernel 5.11.0-19-generic (LP: #1930637)
    - bus: mhi: core: Download AMSS image from appropriate function

linux (5.11.0-19.20) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-19.20 -proposed tracker (LP: #1930075)

  * Packaging resync (LP: #1786013)
    - update dkms package versions

  * CVE-2021-33200
    - bpf: Wrap aux data inside bpf_sanitize_info container
    - bpf: Fix mask direction swap upon off reg sign change
    - bpf: No need to simulate speculative domain for immediates

  * AX201 BT will cause system could not enter S0i3 (LP: #1928047)
    - SAUCE: drm/i915: Tweaked Wa_14010685332 for all PCHs

  * CVE-2021-3490
    - SAUCE: Revert "UBUNTU: SAUCE: bpf: verifier: fix ALU32 bounds tracking with
      bitwise ops"
    - gpf: Fix alu32 const subreg bound tracking on bitwise operations

  * CVE-2021-3489
    - SAUCE: Revert "UBUNTU: SAUCE: bpf: prevent writable memory-mapping of read-
      only ringbuf pages"
    - bpf: Prevent writable memory-mapping of read-only ringbuf pages

  * Select correct boot VGA when BIOS doesn't do it properly (LP: #1929217)
    - vgaarb: Use ACPI HID name to find integrated GPU

  * Realtek USB hubs in Dell WD19SC/DC/TB fail to work after exiting s2idle
    (LP: #1928242)
    - USB: Verify the port status when timeout happens during port suspend

  * CVE-2020-26145
    - ath10k: drop fragments with multicast DA for SDIO
    - ath10k: add CCMP PN replay protection for fragmented frames for PCIe
    - ath10k: drop fragments with multicast DA for PCIe

  * CVE-2020-26141
    - ath10k: Fix TKIP Michael MIC verification for PCIe

  * CVE-2020-24587
    - ath11k: Clear the fragment cache during key install

  * CVE-2020-24588
    - mac80211: properly handle A-MSDUs that start with an RFC 1042 header
    - cfg80211: mitigate A-MSDU aggregation attacks
    - mac80211: drop A-MSDUs on old ciphers
    - ath10k: drop MPDU which has discard flag set by firmware for SDIO

  * CVE-2020-26139
    - mac80211: do not accept/forward invalid EAPOL frames

  * CVE-2020-24586 // CVE-2020-24587 // CVE-2020-24587 for such cases.
    - mac80211: extend protection against mixed key and fragment cache attacks

  * CVE-2020-24586 // CVE-2020-24587
    - mac80211: prevent mixed key and fragment cache attacks
    - mac80211: add fragment cache to sta_info
    - mac80211: check defrag PN against current frame
    - mac80211: prevent attacks on TKIP/WEP as well

  * CVE-2020-26147
    - mac80211: assure all fragments are encrypted

  * raid10: Block discard is very slow, causing severe delays for mkfs and
    fstrim operations (LP: #1896578)
    - md: add md_submit_discard_bio() for submitting discard bio
    - ...