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Re: Best place to look for webcam drivers
by Richard Klein Aug. 9, 2019

Aug. 9, 2019

Output from v4l2-ctl -l: > User Controls > > brightness 0x00980900 (int) : min=0 max=255 step=1 default=128 value=128 flags=slider > contrast 0x00980901 (int) : min=0 max=255 step=1 default=128 value=128 flags=slider > gamma 0x00980910 (int) : min=1 max=6 step=1 default=3 value=3 flags=slider > gain_automatic 0x00980912 (bool) : default=1 value=1 > power_line_frequency 0x00980918 (menu) : min=0 max=2 default=0 value=0 > sharpness 0x0098091b (int) : min=0 max=3 step=1 default=2 value=2 flags=slider > > JPEG Compression Controls > > compression_quality 0x009d0903 (int) : min=50 max=87 step=1 default=75 value=75 Output from v4l2-ctl -D: > Driver Info (not using libv4l2): > Driver name : gspca_zc3xx > Card type : USB Camera (041e:4051) > Bus info : usb-0000:00:1d.3-1 > Driver version: 4.15.18 > Capabilities : 0x85200001 > Video Capture > Read/Write > Streaming > Extended Pix Format > Device Capabilities > Device Caps : 0x05200001 > Video Capture > Read/Write > Streaming > Extended Pix Format Maybe "(not using libv4l2):" is my problem? Do I need a webcam app that specifically supports gspca? Anyway, I added myself to the 'video' group and ran Cheese. Since I was already in the terminal, I ran Cheese from the command line instead of from the GUI, like I usually do, and I was rewarded with some extra output (editing out some irrelevant lines): > Xlib: extension "RANDR" missing on display ":0". > (cheese:8484): cheese-CRITICAL **: 10:26:20.051: cheese_camera_device_get_name: assertion 'CHEESE_IS_CAMERA_DEVICE (device)' failed Cheese still didn't find a video device, and I got the same results running it as root. On Thu, Aug 8, 2019 at 4:59 PM John Stoffel <john(a)stoffel.org> wrote: > >>>>> "Richard" == Richard Klein <rich(a)richardklein.org> writes: > > Richard> Hmm... > Richard> From lsusb: > Richard> Bus 005 Device 003: ID 041e:4051 Creative Technology, Ltd Live! > Cam Notebook Pro [VF0250] > > So it sees it ok as a USB device > > Richard> And from v4l2-ctl: > Richard> USB Camera (041e:4051) (usb-0000:00:1d.3-1): > Richard> /dev/video0 > > And it finds it properly. Maybe you can do: > > v4l2-ctl -l /dev/video0 > > and see what controls is offers. Or try the -D option. See the man > page for things to try. > > Richard> But the webcam app I installed (Cheese) detects no device. > > Did you check the permissions of /dev/video? Does 'cheese' have the > permissions to open the file? Try running as root, or adding your > account to the 'video' group. > > John >

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Best place to look for webcam drivers
by Richard Klein Aug. 7, 2019

Aug. 7, 2019

I picked up a Creative Labs model VF0250 webcam, but V4L isn't detecting any devices. I googled it and it looks like gspca supported this model, but it also looks like gspca was abandoned years ago. Where would you look for answers? BTW, this is for Mint.

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Reminder: WLUG Meeting Today (July 18th, 2019)
by Tim Keller July 18, 2019

July 18, 2019

Hey Everybody, This is the final reminder that we've got a meeting today! Date & Time: July 18th 2019 @ 7PM Location: WPI Student Center Morgan Room Topic: Pi 4! I bought a pi 4 yesterday and I've been poking around with it. I'll bring it along with a bunch of other pi's! Snacks and refreshments will be provided and afterwards we'll head off to dinner! Thanks, Tim Keller WLUG President -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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WLUG Meeting July 18th 2019 NOTE: Location Change: WPI Campus Center: Morgan Room
by Tim Keller July 16, 2019

July 16, 2019

Hey Everybody! We've got a meeting this Thursday July 18th at 7PM! Location: WPI Campus Center: Morgan Room (main floor hallway to the left of the front desk) Topic: Pi 4 I thought we might talk about the pi 4. I'm going to grab the 1GB version so we'll have a sample device to poke at. I'd really like the 4GB version, but those are a bit hard to find.. I'll have it, plus a pi 3 and an assortment of older pi's as well. As usual snacks and refreshments will be provided and we'll head off for dinner to continue to the conversation. Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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Next Meeting moved to July 18th 2019
by Tim Keller July 3, 2019

July 3, 2019

Hey Gang, I'm moving the meeting down a week since I'll be on vacation next week. The meeting will be on July 18th. I'd love to do a comparison of a pi 4 vs. a pi 3, but buying a 4GB pi 4 is a bit challenging... If someone already has one and could bring it, that would be awesome, if not we'll have to think of a different topic. Yeah, I know you can buy a 1GB/2GB pi 4... but really why would you do that. Thanks, Tim. WLUG President -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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Dual GPU Laptops Experience?
by Dennis Payne June 28, 2019

June 28, 2019

I bought my last laptop from System 76. It's worked well but I was thinking of upgrading. I run Fedora so I wiped the Ubuntu installed by System 76 and haven't had any problems. However my current laptop only has the Intel graphics. The new Gazelle, which is closest to what I have, includes Intel and Nvidia. Anybody have any experience with that setup with Fedora and Wayland? Does it work out of the box? Do you need to install System 76 tools to switch between the different chips? Does Nvidia with Nouveau driver give better performance over Intel? I'm unlikely to install Nvidia's closed source driver. -- Dennis Payne dulsi(a)identicalsoftware.com https://social.freegamedev.net/channel/dulsi

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Reminder: June WLUG meeting TODAY! Topic: Side Channel Attacks.
by Tim Keller June 13, 2019

June 13, 2019

Hey Everybody, We've got a meeting today, Thursday June 13th at 7PM! Location: WPI Campus Center Mid-Century room (rm 331) aka, the usual haunt. After last meeting we ended up having a side conversation regarding the now multiple side channel attacks that the Intel microarchitecture is vulnerable to. I thought it might be a good time to actually deep dive what these are, why they keep happening, why they're likely to continue and what efforts are being put in to try to mitigate them and the effects these migrations have on performance. As usual snacks and refreshments will be supplied and afterwards we'll head off for dinner to continue the conversation! Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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WLUG Meeting June 13th 2019! Topic: Side Channel Attacks
by Tim Keller June 8, 2019

June 8, 2019

Hey Everybody, We've got a meeting on Thursday June 13th at 7PM! Location: WPI Campus Center Mid-Century room (rm 331) aka, the usual haunt. After last meeting we ended up having a side conversation regarding the now multiple side channel attacks that the Intel microarchitecture is vulnerable to. I thought it might be a good time to actually deep dive what these are, why they keep happening, why they're likely to continue and what efforts are being put in to try to mitigate them and the effects these migrations have on performance. As usual snacks and refreshments will be supplied and afterwards we'll head off for dinner to continue the conversation. Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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Sr or Prin Embedded Software Engineer - Linux
by John Spencer June 4, 2019

June 4, 2019

Connected Systems has a client in Boston with a perm opening for a Sr or Prin level Embedded Software Engineer with strong Linux experience. Must be able to work on-site in Boston. They are located within walking distance to public transportation GREAT opportunity to work with a successful and growing company on interesting products. Excellent benefits and perks. Salary in the $150'sK range for the right person. Work with existing team to get current product released to the market. As soon as that work is done, next project will involve design and development of next generation products. All work is on embedded linux Must have a strong background with C and be an expert with embedded Linux Must be able to work at the Linux driver and kernel level Must have multi-threaded experience Must have microprocessor/microcontroller experience as well (ARM is helpful) Experience with C++ and working in the lab testing hardware is helpful. Please send your resume to me with any questions. Regards, John Spencer Connected Systems Partners Office: (978) 455-5550 x208 Cell: (978) 621-9743 jspencer(a)connectedsp.com www.connectedsp.com GET CONNECTED!

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Setting up new monitor
by Richard Klein May 30, 2019

May 30, 2019

I picked up a free monitor today, a Samsung S24C230L. The native resolution is 1920x1080, and it's connected via DVI. The existing monitor has a native resolution of 1680x1050 and is plugged into the analog VGA port. The NVIDIA X Server Settings seem to agree, so what's up with the display on the second monitor? https://photos.app.goo.gl/M1R9MQnDMCaD7qca6 When I try saving the X Configuration File, it warns me that I should use relative positioning for the second display, instead of absolute positioning. Maybe that's the problem, but I can't find that setting anywhere. Got any ideas? -- Rich

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