Raspberry Pi 4 WiFi Fails When Setting HDMI to 2560×1440 Resolution

Raspberry Pi 4 WiFi Fail 2560x1440 Resolution

Enrico Zini was working on a digital signage solution based on Raspberry Pi 4, then he set the video output to 2560×1440, and all hell broke loose. And by that, I mean WiFi stopped working. It was not obvious at first but after a full day of debugging, trying both micro HDMI outputs, different HDMI cables, three different Raspberry Pi boards, different power adapters, Raspbian Buster and Buster Lite, different MicroSD cards… He could reproduce the problem in all conditions, all he needed to do was to set the resolution to 2560×1440, and WiFi would just stop working. Setting the resolution to 2048×1080 or lower, and all WiFi connectivity issues disappeared. He did not test at higher resolutions, and another user reported a similar problem happening at 2.4 GHz, but not at 5 GHz, albeit when setting HDMI output to 1920×1080. So it looks like interference, but as noted by some it’s also surprising because the HDMI port and the …

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Rock Pi 4C SBC to Support Dual Display Setups via micro HDMI and mini DP Ports

rock pi 4 model C

Rockchip RK3399 powered Rock Pi 4 SBC was introduced at the end of 2018 and followed nearly exactly Raspberry Pi 3 Model B form factor just with a more powerful processor, GPU, as well as more memory depending on which model you purchase. But in June 2019, the Raspberry Pi foundation launched Raspberry Pi 4 SBC with a much faster processor and many of the same ports as its predecessor except for support for two HDMI displays via micro HDMI ports. Radxa has now followed suit with Rock Pi 4C which offers two modern video outputs, but with a twist as the upcoming SBC combines one micro HDMI port with one mini DP port. Rock Pi 4C was introduced at the XDC 2019 conference where open-source graphics developers meet, and Radxa was a “supporter”. The company explains Rock Pi 4B uses RK3399’s USB type-C controller for the two USB 3.0 ports, and as a result, they only have 2 remaining …

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Geniatech ATV1660K TV Box Supports Dual HDMI Output, HDMI Input

Android TV Box Dual HDMI Output

There are many applications that may benefit from dual display support from digital signage to healthcare to retail or entertainment either to provide access to two different output for the service provider and customer or simply to mirror content.  Most Android TV boxes only come with one display output however, so in most cases, you’d have to switch to an Intel mini PC or add a USB-C display adapter if supported by the hardware. Geniatech ATV1660K TV box supports dual HDMI output out of the box, as well as HDMI input. The Android 5.1 TV box is powered by the time-tested Rockchip RK3288 processor and comes with 2GB RAM and 16GB storage by default. Geniatech ATV1660K specifications: SoC – Rockchip RK3288 quad-core Arm Cortex-A17 processor at up to 1.8GHz, with Mali-T764 GPU System Memory – 2GB DDR3 (1GB optional) Storage – 16GB eMMC flash (4GB-32GB optional), full-size SD card slot up to 32GB Video Output 2x HDMI 2.0 for 4K …

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LAKE I Home Cloud TV Box with HDMI Input Goes for $54 (Promo)

We’ve previously covered LAKE I Home Cloud as one of the cheapest TV boxes based on Realtek RTD1295 processor, and featuring HDMI input for video recording and/or streaming video from an external source up to 1080p60, as well as an SATA bay for 2.5″ drives. A reader has just informed me the device was now available for an even cheaper price, as it is offered for just $53.99 + shipping on GearBest. The specifications are pretty standard for an RTD1295 media center: SoC – Realtek RTD1295 quad core Cortex A53 processor with ARM Mali-T820 MP3 GPU System Memory – 2GB DDR4 Storage – 16GB eMMC 5.1 flash + SD card slot up to 128 GB + SATA hard disk bay for 2.5″ drives with 9.5mm / 7.5mm thickness Video I/O – HDMI 2.0a output, and HDMI input (recording and streaming up to 1080p @ 60 Hz) Audio I/O – HDMI in and out, 1x S/PDIF output Video Playback – HDR, …

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$400 UGEE UG-2150 21.5″ Drawing Monitor Comes with a 2048-Level Pressure Sensitivity Pen

UG-2150 Drawing Monitor

A few weeks ago, I wrote about a 7″ HDMI touchscreen display, and today when I first come across UGEE UG-2150 monitor, I thought I had found something similar but with a bigger display size. However, the 21.5″ monitor has a different target applications, and is specifically designed for drawing as it ships with a 2048-level pressure sensitivity stylus. UGEE UG-2150 monitor specifications: Display Resolution – 1920 x 1080 Colors – 16.7M Drawing / touch Pressure Sensitivity – 2048 levels Accuracy – 0.25 mm Report Rate – 220 reports/per second Response Time – 14ms Video Input – VGA, DVI, HDMI USB – 1x USB 2.0 port Power Supply – Yes… Dimensions Full device – 517x 321.89 x 30mm excluding the stand Active Area – 476.64 x 268.11mm The monitor ships with a P50S rechargeable pen, two pen holders, 8 different tips, a remove ring, a USB cable, a power adapter and cord, VGA and HDMI cables, as well as a …

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Extend VGA or HDMI Signals over “Ethernet” with VGA / HDMI Extender over Cat5/Cat6 Cables

Ethernet VGA Extender Kit

A host computer or media player may not always be in the same room as its display(s), for example for digital signage where you may want to have several displays controlled by one computer in different rooms, or if you want to add a display to one of your room without necessarily adding another TV box or set-top box. We’ve already seen solution to extend the video signals over a few hundred meters using a HDMI powerline extender or wireless AV transmitted / receiver kit. The former is rather expensive (~$250) and the latter only works with composite. Today, I’ve come across other video extender solutions relying on Cat5/Cat6 “Ethernet” cables, first with an Ethernet to VGA extender kit that sells for $12.99 shipped on Banggood, but there are also Ethernet to HDMI solutions for around $25 to $40 offering a range of up to 120 meters over Ethernet. Both come with one receiver and one transmitter, with the latter …

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Astro Design HDMI Test Equipment Supports 8K @ 120 Hz

Astro-8K-Digital-Video-Generator

8K media players and 8K TVs are coming, but if you develop one of those products how do you test them since 8K players/TVs are not available just yet. Answer: Test equipment. Astro Design offers just that with their VG-879 digital video generator, as well as their VA-1844A HDMI protocol analyzer. VG-879 digital video generator key features: 4K/60p is transmitted by one channel of 12G-SDI. Max.4 slot-type interface units can be selected from 12G-SDI, HDMI2.0b 3G or 6G,  DisplayPort 1.2a, V-by-One and Analog. By synchronizing 4 or 2 units of VG-879, 8K/120p or 8K/60p signals are supported. (8K/120p by V-by-One HS, 8K/60p by V-by-One HS and HDMI.) HDMI 2.0b test functions supported EIA CEA-861-F Timing Format including 4K/50, 60p, YCBCR 4:4:4/4:2:2/4:2:0 timing.  SCDC parameter change and status display.  ITU-R BT.2020 color bar and video output setting 4K6G with Scrambling Enable setting CEA-861.3 HDR (High Dynamic Range) InfoFrame setting HDR Test Patterns supported (New) 21:9 test patterns as option (VT-8500-0014) HDMI2.0 Compliance Test …

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Yamaha RX-V385 A/V Receiver to Support eARC (part of HDMI 2.1 specifications)

HDMI 2.1 promises features such as 8K/10K video output, dynamic HDR, or enhanced audio return channel (eARC), but so far I had not seen any hardware boasting support for the new specifications. It’s not really surprising, as the HDMI Compliance Test Specifications (CTS) for HDMI 2.1 is expected to be released in stages starting in Q2 2018. While I have yet to see any HDMI 2.1 capable TV, Yamaha is already showing off a 5.1 A/V receiver allegedly HDMI 2.1 via their upcoming RX-V385 model that will be sold for $299.95 in the US. Key features listed by the company: 5.1-Channel powerful surround sound Bluetooth for wireless connectivity HDMI 2.1 with HDCP 2.2 (4 in/1 out) 4K Ultra HD support, HDR10, Dolby Vision, Hybrid Log-Gamma and BT.2020 YPAO auto-calibration technology for ideal sound That looks good, and if we look into the details specifications we can see HDMI eARC (part of HDMI 2.1) will be supported via a firmware upgrade, …

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