I wonder if could be related to a faulty charging port or cable? I was having connectivity issues with my OP5t, and it seemed like sometimes it was sometimes charging at a lower rate, despite using the Dash charger adapter or whatever. But then it became hard to charge at all, and eventually I had to replace the port (which thankfully wasn't too hard). Anyway, just a thought. Maybe try another cable for starters?

@James-T What you surmised is quite correct. To shutdown the OP6 and 6T you have to either leave it a while, or use the key combo to het to fastboot mode and power off from there.

@MrT10001 oh, cool, that is the good news, thanks your research,so the solution that I need change the more better OTG hub, I will try it, thanks your effort again.

@ikoz I search in internet and find below solution, but not work, even memory fully used, but swap used still is 0, I don't know why. sudo fallocate -l 8G /userdata/swapfile sudo chmod 600 /userdata/swapfile sudo mkswap /userdata/swapfile sudo swapon /userdata/swapfile sudo sysctl vm.swappiness=80

@ancientsounds in my experience the mediaplayer app only plays mp4 videos encoded in a special manner. If you're lucky, they work, or they just don't. Maybe you were lucky until now. I encode or re-encode my video files with Handbrake with standard settings. There was no file yet, the media player didn't play... Maybe this helps...

@MrT10001 Your suggestion to discharge the battery completely was the solution. Phone has been working fine since then. Many thanks!

@MrT10001 Success! I had to Erase & Reset All. Once it rebooted and went through the set up, the software update was available. I am now on 20.04 (2024-W47). I hated to start from scratch, but at least it works now. Thanks so much for your help!

@arubislander ok, Thanks for your answer.

@arubislander oh, thanks, after formatted to FAT32, it works now.

@RandomUser said in How to update Xenial to Focal?: but of course the installation is interupted. Hi, In my experience it is not the case. I force the fastboot mode by pressing the vol+power buttons and just continue the install. I'm not sure whether I unplug the device or not, but I didn't have issue continuing or nothing that a retry couldn't fix. But I have also to clarify that I don't own the same device and I know devices with A/B boot might have some additional complexity (not sure if that's the case of the OP6).

@MrT10001 thank u sooo much

I've been using UT 20.04 on my OnePlus 6 without issues, including Waydroid with MicroG. However, today I noticed there's no audio from the headphone jack to my stereo system. Bluetooth audio works fine with a Bluetooth speaker.

Hi @wurmphlegm Have you tried to force the fastboot mode? I remember having to do it manually as the installer wasn't able to make my device comply. So I used the volume buttons and power button to make it happen.

@ginggs You cannot flash that through fastboot like that. With a .bat file it has to be Windows and run through the Windows terminal. Linux would use the .sh and run through a CLI. To manually flash you need to extract the images.zip file and then flash manually in this order: fastboot flash aop_a aop.img fastboot flash aop_b aop.img fastboot flash bluetooth_a bluetooth.img fastboot flash bluetooth_b bluetooth.img fastboot flash boot_a boot.img fastboot flash boot_b boot.img fastboot flash dsp_a dsp.img fastboot flash dsp_b dsp.img fastboot flash dtbo_a dtbo.img fastboot flash dtbo_b dtbo.img fastboot flash fw_4j1ed_a fw_4j1ed.img fastboot flash fw_4j1ed_b fw_4j1ed.img fastboot flash fw_4u1ea_a fw_4u1ea.img fastboot flash fw_4u1ea_b fw_4u1ea.img fastboot flash modem_a modem.img fastboot flash modem_b modem.img fastboot flash oem_stanvbk oem_stanvbk.img fastboot flash qupfw_a qupfw.img fastboot flash qupfw_b qupfw.img fastboot flash storsec_a storsec.img fastboot flash storsec_b storsec.img fastboot flash system_a system.img fastboot flash system_b system.img fastboot flash vbmeta_a vbmeta.img fastboot flash vbmeta_b vbmeta.img fastboot flash vendor_a vendor.img fastboot flash vendor_b vendor.img fastboot flash LOGO_a LOGO.img fastboot flash LOGO_b LOGO.img Thanks to the XDA-developers forum @mauronofrio here.

@MrT10001 thanks guys I knew something was not normal here. I hope someone figures this out as I think ubuntu touch on this device is amazing.

@ezst036 Wow, I found the OP6T one of the easiest phones to install! I'll put the next bit in bold to help others: If the device is at the bootloader (fastboot mode) and connected and you start the installer, the installer will pick it up as example "sdm845". If you know which device you have manually select it from the drop down list in the installer and follow the on screen instructions. The bootloader must be unlocked to install Ubuntu Touch and if the instructions indicate a specific version of Android must installed before, install that version, boot into it and set it up, enable developer mode and ADB/USB debugging before starting the installer. The reasons for the specific version of Android has to be installed is for things like Vendor BLOBS, specific bootloader, specific kernel. To install UT on the OP6T I have always had to downgrade the Android version to Android 9 using this file Fulldowngrade_wipe_18801_181024_2027_user_MP2_release.zip This can be obtained from here. The link is still active at this date (11th February 2024). Download it to the root of the device i.e. connect the device to the PC and set the USB connection to file transfer and copy the zip (STILL zipped) file to the device - NOT in a folder (i.e. the root of the device). Once done then go to Settings, System, System updates and with the cog symbol on the top right, choose Local Install and let it do it's thing. It will take about 15 minutes, reboot and leave you at the Android set up screen. Set up Android again, and enable Developer options and ADB?USB debugging. Reboot to the bootloader. Unlock the bootloader using fastboot oem unlock. Reboot the device and set Android up again, enabling ADB/USB debugging. Connect it to the PC and run the Installer. The installer will then reboot the device and do most of the work for you. You will at one stage have to boot into recovery, the installer will do the rest. @ezst036 You may have had issues due to the device being T-Mobile, but I have had many locked devices that I have installed UT to and it was only SIM locked, the UT install always went through. If the device reboots and you get a message saying "Qualcomm Crash Dump", power off the device, charge the battery for a bit and boot it up again. The stability of the device is not quite there yet, mainly due to the issue across devices with UT draining the battery. There is an app called BatterySaver for 20.04 by Lionel Duboeuf that will help. I have no bricked devices due to installing UT (yet)!