amosbatto @amosbatto@librem.one

@Utgardloki@norden.social

Madaidan makes a few good points about Android having a more hardened kernel that the one found in most Linux distros, but there are lots of problems with his arguments. See the links here:
https://www.reddit.com/r/Purism/comments/pcos2x/would_it_be_possible_to_put_grapheneos_on_the/halmitk/?utm_source=reddit&utm_medium=web2x&context=3

@agx, I hope that this means that we will soon have H.265 decoding soon as well:
https://www.cnx-software.com/2021/02/18/open-source-h-265-hevc-hantro-g2-decoder-support-added-to-nxp-i-mx-8m-in-linux/

@agx @purism, Awesome. I have updated the community FAQ with info about convergence on the Librem 5:
https://source.puri.sm/Librem5/community-wiki/-/wikis/Frequently-Asked-Questions#how-well-will-convergence-work-to-use-the-librem-5-as-a-desktop-pc

@agx @purism, I checked the i.MX 8M Quad data sheet and it says that it only supports DisplayPort 1.3 with a max resolution of 4K at 30fps. Still nice to know that 4K is theoretically possible. I was only expecting 1080p video, so I will be happy if we can get anything higher than that.

@agx @purism , That's awesome!

Do you have any idea what will be the max resolution supported by DisplayPort alt-mode on the Librem 5? That question came up on the Purism forum last year.

@dos, It looks like people are experimenting with many RAM speeds on the PinePhone: https://forum.pine64.org/showthread.php?tid=9832

According to the poll, 7/16 can run the RAM at 624MHz.

@dos, Could you post the output of "sudo hardinfo -r" for the two phones? That would give us some benchmarks for the CPU and GPU performance.

Does "lshw" show the RAM speed on the PinePhone? (I'm assuming this is not the actual speed, but the top rated speed of the RAM stick, but I'm curious what it says.)

@dos, Are you running the PinePhone's RAM at 624MHz? The difference in load times really shows the advantage of LPDDR4-3200 over LPDDR3-1248 RAM.

I created a table comparing the specs of 12 phones that can be bought with Linux preinstalled:
https://amosbbatto.wordpress.com/2020/08/25/comparing-linux-phones/

It is striking the difference between the amount of information that is publicly available for the PinePhone and Librem 5 compared to all the rest of the Linux phones that use Qualcomm Snapdragon and MediaTek Helio processors, which require NDA's to view their datasheets and don't allow the publication of schematics, because they are based on copyrighted reference designs.

@agx, Another thing that I noticed was that the i.MX 8M Plus only supports HDMI and no DisplayPort.

If the Plus requires a binary blob for HDMI like the Quad did, then it seems like the only solution for Fir is to add a chip to convert the LVDS output into DisplayPort, but it probably won't be as high of resolution as the Plus's HDMI.

Does the mainline Linux driver support LVDS on the i.MX 8M?

@agx, I'm so glad to see that you got DisplayPort working. I was wondering how Purism got around that binary blob for HDMI.

I haven't been able to find any info about the MIPI-CSI2 interface in the mainline Linux driver. Do you have any updates on that front?

@dos, HDMI alt-mode not being common gives me hope for the future. As more devices move to USB-C, we can get rid of HDMI, which requires licensing fees, and just use DisplayPort, which is a freer standard. Nice to find something positive in this dreary world.

@dos, Oh I assumed that DP alt-mode was like normal DP, but I Googled it and found that there is no DP Dual Mode (DP++) over DP alt-mode, so it isn't possible to send an HDMI signal over DP alt-mode. We will need an active adapter to convert from DP to HDMI.
This article explains it:
https://www.barco.com/en/news/displayport-to-hdmi-conversion-should-i-use-an-active-or-passive-adapter

@dos, OK, that makes sense, but if DisplayPort Alt Mode is carrying an HDMI signal, we still have the same question for RYF certification.

Does the DCSS driver for the iMX8MQ no longer require the HDMI DRM blob or is the video being converted to HDMI outside the iMX8MQ?

Awesome to see DisplayPort Alt Mode mode working and in 3D!

I noticed that the i.MX 8M Quad documentation shows a DRM blob for using HDMI, so I was wondering if you found a way around that using DCSS or will we be limiited to DisplayPort Alt Mode?

@lunduke
Can you post the weight and dimensions of the phone?
What are the image sensors being used in the front and back cameras?
Posting the output of the lshw and hwinfo commands would be very helpful and posting a high resolution photo of the board and its chips would answer a lot of the questions on the forum.

He escrito un articulo:
"La importancia del Purism Librem 5"
https://amosbbatto.wordpress.com/2019/07/23/la-importancia-del-purism-librem-5/