Enable brightness control on HP DreamColor panel
Bug #1898865 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Groovy |
Fix Released
|
Medium
|
Unassigned | ||
linux-oem-5.6 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Groovy |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
Brightness on HP DreamColor panel, which can be found on new HP Zbook
Studio, cannot be changed.
[Fix]
Let DRM know the panel should use DPCD instead of PWM to control
backlight.
[Test]
With the patch applied, we can change the brightness on HP Zbook Studio.
[Regression Potential]
If there's any panel in the quirk list depends on checking brightness
control capability then this change will have an impact. However it's
rather unlikely because it defeats the purpose of the quirk list.
CVE References
Changed in linux-oem-5.6 (Ubuntu Groovy): | |
status: | New → Invalid |
Changed in linux (Ubuntu Focal): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Groovy): | |
importance: | Undecided → Medium |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Focal): | |
status: | New → Confirmed |
Changed in linux (Ubuntu Groovy): | |
status: | New → Confirmed |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | New → Confirmed |
tags: | added: oem-priority originate-from-1898670 stella |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | Confirmed → Fix Committed |
Changed in oem-priority: | |
assignee: | nobody → jeremyszu (os369510) |
tags: |
added: verification-done-focal removed: verification-needed-focal |
no longer affects: | oem-priority |
Changed in linux (Ubuntu Focal): | |
status: | Confirmed → Fix Committed |
Changed in hwe-next: | |
status: | New → Fix Released |
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This bug was fixed in the package linux - 5.8.0-22.23
---------------
linux (5.8.0-22.23) groovy; urgency=medium
* groovy/linux: 5.8.0-22.23 -proposed tracker (LP: #1899099)
* Packaging resync (LP: #1786013)
- update dkms package versions
* oops in nvkm_udevice_info() [nouveau] (LP: #1898130)
- drm/nouveau/device: return error for unknown chipsets
* python3-venv is gone (LP: #1896801)
- SAUCE: doc: remove python3-venv dependency
* *-tools-common packages descriptions have typo "PGKVER" (LP: #1898903)
- [Packaging] Fix typo in -tools template s/PGKVER/PKGVER/
* Enable brightness control on HP DreamColor panel (LP: #1898865)
- SAUCE: drm/i915/dpcd_bl: Skip testing control capability with force DPCD
quirk
- SAUCE: drm/dp: HP DreamColor panel brigntness fix
* Groovy update: v5.8.14 upstream stable release (LP: #1898853) next_entry( ) accounting of temp buffer size display_ crtc_set_ config drivers/ timer-gx6605s: Fixup counter reload free_txskb to free tx skbs net/wan/ hdlc_fr: Add needed_headroom for PVC devices open/release( ) net/wan/ lapbether: Make skb->protocol co...
- io_uring: always delete double poll wait entry on match
- btrfs: fix filesystem corruption after a device replace
- mmc: sdhci: Workaround broken command queuing on Intel GLK based IRBIS
models
- USB: gadget: f_ncm: Fix NDP16 datagram validation
- Revert "usbip: Implement a match function to fix usbip"
- usbcore/driver: Fix specific driver selection
- usbcore/driver: Fix incorrect downcast
- usbcore/driver: Accommodate usbip
- gpio: siox: explicitly support only threaded irqs
- gpio: mockup: fix resource leak in error path
- gpio: tc35894: fix up tc35894 interrupt configuration
- gpio: amd-fch: correct logic of GPIO_LINE_DIRECTION
- clk: samsung: Keep top BPLL mux on Exynos542x enabled
- clk: socfpga: stratix10: fix the divider for the emac_ptp_free_clk
- scsi: iscsi: iscsi_tcp: Avoid holding spinlock while calling getpeername()
- i2c: i801: Exclude device from suspend direct complete optimization
- Input: i8042 - add nopnp quirk for Acer Aspire 5 A515
- iio: adc: qcom-spmi-adc5: fix driver name
- ftrace: Move RCU is watching check after recursion check
- tracing: Fix trace_find_
- memstick: Skip allocating card when removing host
- drm/amdgpu: restore proper ref count in amdgpu_
- xen/events: don't use chip_data for legacy IRQs
- clocksource/
- vboxsf: Fix the check for the old binary mount-arguments struct
- mt76: mt7915: use ieee80211_
- libbpf: Remove arch-specific include path in Makefile
- drivers/
- Revert "wlcore: Adding suppoprt for IGTK key in wlcore driver"
- drm/sun4i: mixer: Extend regmap max_register
- hv_netvsc: Cache the current data path to avoid duplicate call and message
- net: dec: de2104x: Increase receive ring size for Tulip
- rndis_host: increase sleep time in the query-response loop
- nvme-pci: disable the write zeros command for Intel 600P/P3100
- nvme-core: get/put ctrl and transport module in nvme_dev_
- fuse: fix the ->direct_IO() treatment of iov_iter
- drivers/