Limitations - Qualcomm Dragonwing Documentation

QCS6490
IQ9
IQ8
IQ6
IQX-7181

Module	Source	Description	Customer Impact	Workaround
Power	Software	Suspend/resume failure on Vision Kit (through USB)	Suspend/Resume failure break core power management, posing a release blocker due to system instability and loss of low-power functionality	Limitation in this Release
Audio	Software	wpctl reports a dummy audio sink, affecting audio encode/decode functionality	Audio encode and decode functionalities impacted	Limitation in this Release
Camera	Software	Camera open/close KPI latency is inconsistent	Inconsistent performance and frame drops observed.	Limitation in this Release
Performance	Software	Graphics do not render correctly during StressNG + GL Manhattan testing, making the reported real-time latency invalid and blocking cyclic-test validation.	Blocks cyclic test validation with StressNG+GL_manhattan on Kodiak	Limitation in this Release
Audio	Software	PipeWire delays device shutdown by more than 10 seconds	High shutdown time	Limitation in this Release
Display	Software	4K HDMI output negotiates a non-standard resolution instead of the supported 4K mode on Kodiak/RB3, affecting external-display validation.	4K display functionality is blocked as the system negotiates a non-standard resolution instead of the PoR-supported 4K mode, impacting external display user experience and HDMI 4K validation.	Limitation in this Release
Camera	Software	Camera streaming is stuck in the pre-rolling state for sHDRv2, sHDRv3 and 3-exposure sHDR use cases.	Camera streaming remians stuck	Limitation in this Release
Performance	Software	Cyclic-test latency exceeds the required 20 µs limit during NoLoad and StressNG testing.	Impact RT latencies , latencies beyond 20usec	Limitation in this Release
Ethernet	Software	After the Renesas USB firmware push on to the device , the Ethernet controller and USB hub do not fully enumerate; the RJ45 port and two USB Type-A ports become unavailable.	Unable to use ethernet from RJ45 port and two type-A USB ports due to this.	Limitation in this Release
Boot	Software	Device reboots instead of powering off when the shutdown command is issued.		Limitation in this Release

Module	Source	Description	Customer Impact	Workaround
Audio	Software	wpctl reports a dummy audio sink, affecting audio encode/decode functionality	Audio encode and decode functionalities impacted	Limitation in this Release
Camera	Software	Camera open/close KPI latency is inconsistent	Inconsistent performance and frame drops observed.	Limitation in this Release
Buses	Software	SD-card fallback boot fails when the UFS root filesystem or EFI image is erased or corrupted	in case of any rootfs or efi images corrupcted or erased on ufs as boot medium , device will not Boot from sdcard as backup by mounting these rootfs and efi images on sdcards	Limitation in this Release
Security	Software	Observing ~1.5 sec Core UEFI boot time regression	Boot time regression ~2 sec	Limitation in this Release
Storage	Software	RAID controller cannot be detected.		Limitation in this Release
DSP_Services	Software	Unexpected cdsprpcd activity causes approximately 6% CPU usage and a power regression of about 10% in idle-clock and idle-display use cases	Idle Clock regression observed	Limitation in this Release
Audio	Software	PipeWire delays device shutdown by more than 10 seconds	High shutdown time	Limitation in this Release
Graphics	Software	Buffer drops occur during 32× 1080p video decode on Lemans, causing FPS drops and a laggy display.	observing fps drop in 32x1080 session, screen becoming laggy in decode session	Limitation in this Release
Security	Software	Devices crashes after eMMC flashing	eMMC flashing causes the QCS9100 device to crash, preventing successful boot and impacting further device validation.	Limitation in this Release
Power	Software	System Crash observed during ‘systemctl suspend’ with U-Boot builds	Impacting suspend resume testcase	Limitation in this Release
OpenGLES	Software	Device gets stuck while executing Reboot Bootloader test.	Reboot Bootloader test cases impacted	Limitation in this Release

Module	Source	Description	Customer Impact	Workaround
Boot	Software	Secure device bootup got stuck	Secure device fails to boot	Limitation in this Release
DSP Services	Software	Fastrpc handle open getting stuck	Fastrpc handle open gets stuck	Limitation in this Release
Performance	Software	FPS drops are observed during the four-Bayer concurrent camera use case	Frame drops observed in 4 camera concurrent use cases, poor user experience.	Limitation in this Release
Camera	Software	Camera open/close KPI latency is inconsistent	Inconsistent performance and frame drops observed.	Limitation in this Release
Security	Software	Observing ~1.5 sec Core UEFI boot time regression	Boot time regression ~2 sec	Limitation in this Release
Storage	Software	RAID controller cannot be detected.		Limitation in this Release
Audio	Software	PipeWire delays device shutdown by more than 10 seconds	High shutdown time	Limitation in this Release
PCIe	Software	Device wakes before the configured 30-second RTC wake-up interval, resulting in premature resume behavior.	Device wakes up before the configured 30-second RTC interval, resulting in premature resume behavior	Limitation in this Release
Display	Software	During eDP0 + eDP1 4K concurrent display testing on RB4, Weston comes up on only one display.		Limitation in this Release
Storage	Software	SD-card detection fails on the latest Monaco QLI build, preventing use of the SD card as storage		Limitation in this Release

Module	Source	Description	Customer Impact	Workaround
Audio	Software	wpctl reports a dummy audio sink, affecting audio encode/decode functionality	Audio encode and decode functionalities impacted	Limitation in this Release
Camera	Software	Camera open/close KPI latency is inconsistent	Inconsistent performance and frame drops observed.	Limitation in this Release
Performance	Software	Graphics do not render correctly during StressNG + GL Manhattan testing, making the reported real-time latency invalid and blocking cyclic-test validation.	Blocks cyclic test validation with StressNG+GL_manhattan on Talos	Limitation in this Release
Camera	Software	Camera does not work after enabling the actuator, blocking camera feature validation.	Camera feature validation is failing after enabling the actuator	Limitation in this Release
Camera	Software	IMX577 camera video is shaking and appears unstable in the linear video use case.	Video is unstable	Limitation in this Release
Camera	Software	Purple/corrupted camera scenes are seen in preview and encode use cases with the Talos 3F10 Bayer sensor.	observing corrupted scene for all preview and encode use cases.	Limitation in this Release
Camera	Software	Talos 3F10 GMSL YUV camera sensor reports an unrecoverable camera-device error while streaming, blocking related use cases.	getting “Camera device encountered an un-recovarable error” while streaming the 3F10 GMSL YUV sensor, all cases related to 3F10 YUV use cases are blocked	Limitation in this Release
Audio	Software	PipeWire delays device shutdown by more than 10 seconds	High shutdown time	Limitation in this Release
Performance	Software	Docker startup time increases by approximately 400–500 ms	Docker startup time increases by approximately 400–500 ms	Limitation in this Release
Kernel	Software	EVK secure devices fail to boot	Secure device fails to boot	Limitation in this Release

Module	Source	Description	Customer Impact	Workaround
Linux	Software	Device gets stuck during boot and does not proceed to kernel/OS login Github Issue : https://github.com/qualcomm-linux/meta-qcom/issues/2621”	Customer can’t use catchall build	It is limitation in this release. Apply https://github.com/qualcomm-linux/meta-qcom/pull/2501 to workaround this issue
Camera	Software	Camera not detected (cam -l shows 0 devices) Github Issue : https://github.com/qualcomm-linux/meta-qcom/issues/2622”	Camera function cannot be verified	It is limitation in this release. Apply https://github.com/qualcomm-linux/meta-qcom/pull/2501 to workaround this issue