FS#48638 - [linux-lts] kernel lts intel i915

Attached to Project: Arch Linux
Opened by Marton Demcsik (dm13dv1b) - Sunday, 20 March 2016, 08:35 GMT
Last edited by Doug Newgard (Scimmia) - Sunday, 20 March 2016, 15:07 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Andreas Radke (AndyRTR)
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Following errors come up on every boot:

└──╼ dmesg | grep i915
[ 4.293651] [drm] Initialized i915 1.6.0 20150327 for 0000:00:02.0 on minor 0
[ 4.858753] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
[ 4.858777] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun

Additional info:
microcode installed (20151106-1)

$uname -r
4.1.20-1-lts

$lscpu
Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz

$lspci
VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
This task depends upon

Closed by  Doug Newgard (Scimmia)
Sunday, 20 March 2016, 15:07 GMT
Reason for closing:  Duplicate
Additional comments about closing:   FS#41569  or  FS#40952  or  FS#41613  or  FS#43848  or probably others.
Comment by Andreas Radke (AndyRTR) - Sunday, 20 March 2016, 10:39 GMT
Does it work well expect the dmesg entries? I guess it has been fixed in kernel 4.4.x or 4.5 mainline trees. We will soon switch to 4.4.x LTS branch when 4.5 hits core repo.

If something serious is broken please report a regression upstream.
Comment by Marton Demcsik (dm13dv1b) - Sunday, 20 March 2016, 14:55 GMT
Hi Andreas,
It works fine. I found nothing broken by this just have seen it in dmesg. I will wait for the 4.4.x LTS :)
Thank you!

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