Package: linux-image-amd64 Version: 5.10.46-4 Severity: important X-Debbugs-Cc: v.schoor.ko...@gmail.com
Dear Maintainer, * What led up to the situation? After installing bullseye, a specialized piece of hardware that I use (Hantek 6022BE oscilloscope) has stopped transmitting packets reliably over USB. This tool is used to read voltages from electronic circuits in realtime - if there is significant latency or some packets are dropped the signal becomes distorted and unusable. However, after working with the maintainer of the software that I use to interact with the scope (OpenHantek, see GitHub issue here: https://github.com/OpenHantek/OpenHantek6022/issues/207) it seems that the issue is specific to my laptop/USB bus. The maintainer confirmed that if there was significant latency, or if packets were dropped, the issue would present itself like I'm seeing it. The same issue is present on Fedora Workstation 34 on my laptop. * What exactly did you do (or not do) that was effective (or ineffective)? I've tried various things that didn't help: - I tried someone else's exact same scope, the same issue occurred (so the issue is on my laptop) - I tried the realtime version of the kernel - I tried all the ports on my laptop, which included USB 2 and 3 ports Some things that I've noticed: - My battery lasts significantly longer after upgrading to bullseye (around 2 hours extra I would guess). I'm not sure if there is now extra power saving features present in the kernel which might be interfering with my USB bus. The issue is present both when connected to AC or when running on battery - The issue doesn't immediately occur. The device works ok for around 10 seconds before the signal becomes corrupted - All my other USB devices still seem to work fine (mouse, external HDD) Installing buster's latest kernel on bullseye (I added the buster repos and pinned it, and installed linux-image-4.19.0-17-amd64 from the oldstable repos) resolves the problem, so it has something to do with the kernel. Other people have reported that they are not experiencing the issue on their side, even with the new kernel (however they have different hardware than me). I am not seeing any error messages in dmesg, so I presume the kernel is not aware of the issue. The oscilloscope’s USB controller is a Cypress CY7C68013A-100AXC (as I understand it, a EX USB FX2 chip). My laptop is an HP Probook 450 G5. lspci gives the following output: 00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08) 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) 00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 08) 00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21) 00:14.2 Signal processing controller: Intel Corporation Sunrise Point- LP Thermal subsystem (rev 21) 00:15.0 Signal processing controller: Intel Corporation Sunrise Point- LP Serial IO I2C Controller #0 (rev 21) 00:15.1 Signal processing controller: Intel Corporation Sunrise Point- LP Serial IO I2C Controller #1 (rev 21) 00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21) 00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21) 00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1) 00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1) 00:1d.0 PCI bridge: Intel Corporation Device 9d1b (rev f1) 00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21) 00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21) 00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21) 00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21) 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15) 02:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78) 03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01) Please let me know if I can give any more information. -- System Information: Debian Release: 11.0 APT prefers stable-security APT policy: (500, 'stable-security'), (500, 'stable'), (1, 'oldstable-updates'), (1, 'oldstable') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-8-amd64 (SMP w/8 CPU threads) Locale: LANG=en_ZA.UTF-8, LC_CTYPE=en_ZA.UTF-8 (charmap=UTF-8), LANGUAGE=en_ZA:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages linux-image-amd64 depends on: ii linux-image-5.10.0-8-amd64 5.10.46-4 linux-image-amd64 recommends no packages. linux-image-amd64 suggests no packages. -- no debconf information
