I am considering buying the DS1520+ (J4x processor like DS920+), however I am not clear if it’s performance will actually be better or worse than the DS1019+
Does applying the fix from FAQ26 give similar/better performance than DS1019+ and therefore carrying on with the DS1520+ or just revert?
the iHD_drv_video driver from Intel does work for the -9xxx CPUs and others in that CoffeeLake family becauser they require it. For all older CPUs (pre CoffeeLake), it is supposed to work but doesn’t on our ApolloLake and GeminiLake processors.
On Synology, until such time as Intel releases the fixes for the non-CoffeeLake CPUs, we do have the workaround which keeps it usable. add VaapiDriver="i965" to Preferences.xml using the Synology Text Editor (only – no Windows editors)
It’s supposed to work for the -4xxx (which they use) but Intel forgot that.
That’s the key question - I am due to get my 1620+ delivered tomorrow - I will then have 30 days to return if the performance is worse than 1019+
If the solution has to come from Intel and Intel thinks they have fixed it - I am concerned that means we will never see an actual fix.
The issue here is “keep it usable” - clearly something can be usable (my old Drobo FS is usable) but far from satisfactory.
Can you share what is the impact you have seen after applying such fix?
The only difference between the iHD driver and the i965 driver is one of maximum bitrate.
The i965 driver has a ‘surge’ problem when sustained bit rates approach 100 Mbps due to it’s older design (initial Quick Sync Video design).
The normal peaks of 130-150 Mbps are fine (CGI in most movies).
The iHD driver uses the other access channel in the CPU (specifically created for UHD multimedia) and is theoretically more stable at these high (and even higher) bit rates.
It should, in theory, be stable at 250+ Mbps sustained.
I would have to read the change log of each plex update to see if the 1520+ receives a iHD driver update right?
So what are the limitations I can do on a i965 driver? Besides the “With or without the fix and attempting to transcode the video with subtitles enabled you will experience issues.”
Hi. I’m in the same situation, i’m really hesitating between 1019+ and 1520+. For some reason i find better deals online for the 1520+ which makes me suspicious!
Is the driver bug too ‘niche’ for intel so that we will get a fix in a very long time / never or do you guys expect that the fix will come up in the next 6 month or so…?
Thank you for the reply. I actually ordered the DS1520+ two days ago. It’s a risk but i feel like when it gets fixed i’ll be happy to have a more modern hardware.
I’ll try it out during the next 30 days and if the temporary fix makes it work without any visible problems, i’ll keep it and wait for the official fix.
I have had the D1520+ for a couple of weeks now and applied the fix immediately.
Everything has been working great - however I am the only one using plex and mostly directly through the roku ultra with direct play at 1080p x265 .
Edit:
It appears there is some movement in the post you linked:
another problem is about application, as I know, GitHub - intel/intel-vaapi-driver: VA-API user mode driver for Intel GEN Graphics family support GLK, to keep the support smooth, we recommend that users who are using i965 driver continue to use it on GLK. because the feature set maybe is different , for example: some VPP algorithm is different.
of course, this case maybe is special? because Plex is using MSDK, MSDK works good with media_driver.
but for most of usage. Application installation could choose different UMD on different platform. right?
Indeed, I just received the DS1520+ yesterday and it seems to work fine with the FIX. I’ll be more able to judge after a coupe of weeks when i’ll have feedbacks from my users.
Yep I read the latest replies from Intel on that post but same as you, I don’t understand much. It feels like they think the issue might already have been fixed by what XinfengZhang did on august 7.
So i don’t know if the fact that we still have the issue is due to them being wrong or if its simply because the updated driver has not been implemented by Synology. Maybe there is a way to try it manually and copy the driver in the NAS somewhere but that’s beyond my skills
Plex is a third-party app to Synology. They will not be updating any drivers in the DSM distribution for Plex. The driver libraries are part of Plex’s distribution package.
The information referenced on github is incomplete.
Some of what Intel has released has already been implemented and did not address the problem still at hand.
It’s best to let Engineering, who is in dialog with Intel, resolve this.
I do recommend using the VaapiDriver="i965" bypass until such time as IHD for J3xxx and J4xxx CPUs is completely resolved.
Was the DS1520+ missed from the list of Celeron J4125 based Synology servers added to the NAS Compatibility list (along with the DS720+ & DS920+), or is there some other reason it’s not on there?
