Bug #1909457 reported by AceLan Kao
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
Fix Released
linux (Ubuntu)
Fix Released
AceLan Kao
Fix Released
AceLan Kao
linux-oem-5.10 (Ubuntu)
Fix Released
AceLan Kao

Bug Description

i915 driver gives below warnings that CML-S GPU doesn't work with TGL/RKL PCH, and the screen is blank.

kernel: i915 0000:00:02.0: drm_WARN_ON(!IS_PLATFORM(dev_priv, INTEL_TIGERLAKE) && !IS_PLATFORM(dev_priv, INTEL_ROCKETLAKE))

Intel provides us a new patch for this issue

Verified on new Dell platforms.

[Where problems could occur]
The first commit reverts the patch that didn't find its way to upstream.
The second to forth commits are to enable DG1 which applied for solving conflicts.
The fifth and sixth commit splits code for EHL and JSL.
The seventh and eighth commits rename enums, no function changes.
The ninth commit is newer version of the first reverted commit.
The tenth commit adds CML CPU support on TGP PCH which fixes this issue.
According to the above explanation,
1. the DG1 in newly enabled by commits 2 to 4, no regression could occur,
2. the EHL and JSL commits are pretty simple and straightforward, should be safe to include,
3. the first commit is equivalence to the ninth commit
4. the tenth commit is pretty simple to add GEN9 into flow control,
so I think there should be no problems could occur from this patchset.

AceLan Kao (acelankao)
no longer affects: linux (Ubuntu Focal)
no longer affects: linux-oem-5.10 (Ubuntu Hirsute)
Changed in linux-oem-5.10 (Ubuntu):
status: New → Invalid
Changed in linux (Ubuntu Hirsute):
status: New → In Progress
Changed in linux-oem-5.10 (Ubuntu Focal):
status: New → In Progress
Changed in linux (Ubuntu Hirsute):
assignee: nobody → AceLan Kao (acelankao)
Changed in linux-oem-5.10 (Ubuntu Focal):
assignee: nobody → AceLan Kao (acelankao)
AceLan Kao (acelankao)
description: updated
tags: added: oem-priority originate-from-1905893 somerville
AceLan Kao (acelankao)
tags: added: originate-from-1905814
AceLan Kao (acelankao)
description: updated
Revision history for this message
Kai-Chuan Hsieh (kchsieh) wrote :



We also need this for the audio support.

AceLan Kao (acelankao)
description: updated
AceLan Kao (acelankao)
description: updated
Revision history for this message
AceLan Kao (acelankao) wrote :

Public bug for the audio issue on comment #1 is here and SRU has been sent.

Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

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 for documentation how to enable and use -proposed. Thank you!

tags: added: verification-needed-focal
Timo Aaltonen (tjaalton)
Changed in linux-oem-5.10 (Ubuntu Focal):
status: In Progress → Fix Committed
AceLan Kao (acelankao)
tags: added: verification-done-focal
removed: verification-needed-focal
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-oem-5.10 - 5.10.0-1011.12

linux-oem-5.10 (5.10.0-1011.12) focal; urgency=medium

  * focal/linux-oem-5.10: 5.10.0-1011.12 -proposed tracker (LP: #1913030)

  * Support CML-S CPU + TGP PCH (LP: #1909457)
    - Revert "UBUNTU: SAUCE: drm/i915/rkl: new rkl ddc map for different PCH"
    - drm/i915/dg1: gmbus pin mapping
    - drm/i915/dg1: Don't program PHY_MISC for PHY-C and PHY-D
    - drm/i915/dg1: add hpd interrupt handling
    - drm/i915/display/ehl: Limit eDP to HBR2
    - drm/i915/jsl: Split EHL/JSL platform info and PCI ids
    - drm/i915: Add PORT_TCn aliases to enum port
    - drm/i915: s/PORT_TC/TC_PORT_/
    - drm/i915/rkl: new rkl ddc map for different PCH
    - SAUCE: drm/i915/gen9_bc : Add TGP PCH support

  * backlight parsing for VBT 234+ (LP: #1912157)
    - drm/i915/vbt: Fix backlight parsing for VBT 234+
    - drm/i915/vbt: Update the version and expected size of
    - drm/i915/vbt: Add VRR VBT toggle

  * HD Audio Device PCI ID for the Intel Cometlake-R platform (LP: #1912427)
    - SAUCE: ALSA: hda: Add Cometlake-R PCI ID

 -- Timo Aaltonen <email address hidden> Mon, 25 Jan 2021 11:43:18 +0200

Changed in linux-oem-5.10 (Ubuntu Focal):
status: Fix Committed → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (20.7 KiB)

This bug was fixed in the package linux - 5.10.0-14.15

linux (5.10.0-14.15) hirsute; urgency=medium

  * hirsute/linux: 5.10.0-14.15 -proposed tracker (LP: #1913724)

  * Restore palm ejection on multi-input devices (LP: #1913520)
    - HID: multitouch: Apply MT_QUIRK_CONFIDENCE quirk for multi-input devices

  * intel-hid is not loaded on new Intel platform (LP: #1907160)
    - platform/x86: intel-hid: add Rocket Lake ACPI device ID

  * Hirsute update: v5.10.11 upstream stable release (LP: #1913430)
    - scsi: target: tcmu: Fix use-after-free of se_cmd->priv
    - mtd: rawnand: gpmi: fix dst bit offset when extracting raw payload
    - mtd: rawnand: nandsim: Fix the logic when selecting Hamming soft ECC engine
    - i2c: tegra: Wait for config load atomically while in ISR
    - i2c: bpmp-tegra: Ignore unknown I2C_M flags
    - platform/x86: ideapad-laptop: Disable touchpad_switch for ELAN0634
    - ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info()
    - ALSA: hda/realtek - Limit int mic boost on Acer Aspire E5-575T
    - ALSA: hda/via: Add minimum mute flag
    - crypto: xor - Fix divide error in do_xor_speed()
    - dm crypt: fix copy and paste bug in crypt_alloc_req_aead
    - ACPI: scan: Make acpi_bus_get_device() clear return pointer on error
    - btrfs: don't get an EINTR during drop_snapshot for reloc
    - btrfs: do not double free backref nodes on error
    - btrfs: fix lockdep splat in btrfs_recover_relocation
    - btrfs: don't clear ret in btrfs_start_dirty_block_groups
    - btrfs: send: fix invalid clone operations when cloning from the same file
      and root
    - fs: fix lazytime expiration handling in __writeback_single_inode()
    - pinctrl: ingenic: Fix JZ4760 support
    - mmc: core: don't initialize block size from ext_csd if not present
    - mmc: sdhci-of-dwcmshc: fix rpmb access
    - mmc: sdhci-xenon: fix 1.8v regulator stabilization
    - mmc: sdhci-brcmstb: Fix mmc timeout errors on S5 suspend
    - dm: avoid filesystem lookup in dm_get_dev_t()
    - dm integrity: fix a crash if "recalculate" used without "internal_hash"
    - dm integrity: conditionally disable "recalculate" feature
    - drm/atomic: put state on error path
    - drm/syncobj: Fix use-after-free
    - drm/amdgpu: remove gpu info firmware of green sardine
    - drm/amd/display: DCN2X Find Secondary Pipe properly in MPO + ODM Case
    - drm/i915/gt: Prevent use of engine->wa_ctx after error
    - drm/i915: Check for rq->hwsp validity after acquiring RCU lock
    - ASoC: Intel: haswell: Add missing pm_ops
    - ASoC: rt711: mutex between calibration and power state changes
    - SUNRPC: Handle TCP socket sends with kernel_sendpage() again
    - HID: sony: select CONFIG_CRC32
    - dm integrity: select CRYPTO_SKCIPHER
    - x86/hyperv: Fix kexec panic/hang issues
    - scsi: ufs: Relax the condition of UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL
    - scsi: ufs: Correct the LUN used in eh_device_reset_handler() callback
    - scsi: qedi: Correct max length of CHAP secret
    - scsi: scsi_debug: Fix memleak in scsi_debug_init()
    - scsi: sd: Suppress spurious errors when WRITE SAME is being disabled
    - riscv: ...

Changed in linux (Ubuntu Hirsute):
status: In Progress → Fix Released
Revision history for this message
Christian Sokolowski (cdscustoms) wrote :

Some release notes or a readme would be very helpful. I tried several ways to run patch to install the intel patch and no luck. It seems many are being affected by this and currently the only work around is to use the 20.04b OEM kernel.

Revision history for this message
Christian Sokolowski (cdscustoms) wrote :

    sudo patch -p0 /lib/modules/5.12.0-051200-generic/kernel/drivers/gpu/drm/i915/i915.ko <
    patching file /lib/modules/5.12.0-051200-generic/kernel/drivers/gpu/drm/i915/i915.ko
    Hunk #1 FAILED at 1263.
    1 out of 1 hunk FAILED -- saving rejects to file /lib/modules/5.12.0-051200-generic/kernel

Revision history for this message
Kai-Heng Feng (kaihengfeng) wrote :

It's also included in kernel 5.11, which is used in 21.04.

Timo Aaltonen (tjaalton)
Changed in hwe-next:
status: New → Fix Released
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