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From: Eli the Bearded <*@eli.users.panix.com>
Newsgroups: comp.os.linux.misc
Subject: Re: riddle me this: youtube kills my usb hub
Date: Thu, 13 Mar 2025 04:38:48 -0000 (UTC)
Organization: Some absurd concept
Message-ID: <eli$2503130038@qaz.wtf>
References: <eli$2503111519@qaz.wtf> <67d0f4ef@news.ausics.net> <eli$2503120045@qaz.wtf> <67d20015@news.ausics.net>
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In comp.os.linux.misc, Computer Nerd Kev <not@telling.you.invalid> wrote:
> Eli the Bearded <*@eli.users.panix.com> wrote:
>> You think something about hardware video decoding could bump my hub off?
> 
> I gather this is some laptop/tablet computer since you say it's a
> "Surface". These days they tend to build lots of functions into the
> same chip ("lspci" often shows evidence of this) with such
> computers, and the same chip doing USB and graphics is quite
> possible. So I can easily imagine a bug in one driver, for h/w
> video decoding on the GPU, messing up USB if it's done on the same
> chip.

In another post in this thread I just detailed turning off the hardware
video performance option without change in hub-knocked-off-line
behavior.

The device here, a Surface Go 2, is a tablet I use with the keyboard
cover and a mouse as a laptop. I have not found a good modern
replacement for the old 10" diagonal eeepc I used to use. I really like
a sub 12" device size, not too picky about thickness, and the 7" ones
are too small for me. This size doesn't have a lot of options, and
Surface Go 2 had a 8gig RAM offering at a 10.5" diagonal, so I've been
using it for almost four years now.

I'm not an lspci expert, but it looks like the video is a separate
device from the USB:

# lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 615 (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 02)
00:05.0 Multimedia controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Imaging Unit (rev 01)
00:13.0 Non-VGA unclassified device: Intel Corporation Sunrise Point-LP Integrated Sensor Hub (rev 21)
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)
00:14.3 Multimedia controller: Intel Corporation Device 9d32 (rev 01)
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)
00:15.2 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #2 (rev 21)
00:15.3 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #3 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:19.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO UART Controller #2 (rev 21)
00:19.2 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #4 (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #3 (rev f1)
00:1c.3 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #4 (rev f1)
00:1c.6 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #7 (rev f1)
00:1e.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO UART Controller #0 (rev 21)
00:1f.0 ISA bridge: Intel Corporation Device 9d4b (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)
01:00.0 Network controller: Intel Corporation Wi-Fi 6 AX200 (rev 1a)
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)
03:00.0 Non-Volatile memory controller: KIOXIA Corporation Device 0001

It's larger than I'd like, but I've been thinking this might get
replaced with a Framework 12 when those come out. That is still pretty
small and supposedly will support up to 48gigs of RAM.

Elijah
------
not that RAM has been much of an issue at 8gig