Bugzilla – Bug 11169
Screen flickers
Last modified: 2010-04-08 17:25:38 UTC
I've now noticed this twice today with 4399 and after I updated to r4402 as well. Maurice pointed out the flicker only happens during a transition on the screen. While looking at a still menu there is no flicker, but while watching now playing or actively browsing the screen flickers.
this is likely specific to your hardware. did you show this to Maurice in person?
i am wondering if this is not something similar to the audio L/R swap where the buffers get messed up.
Interesting. you think it's actually two different frame buffers flickering?
Hopefully fixed in r4694. The screen refresh was not waiting for the vsync.
I'm seeing it now with r4712 pb2. :-(
*** Bug 11472 has been marked as a duplicate of this bug. ***
I have seen it with r4875, after the unit had been on and playing for > 30 MIN
This comes up periodically for me too. It's not fixed, whatever it is. My hunch is Dean's comment #3 is what is happening.
CAT testers have seen this as well, even with firmware r5265
Created attachment 5093 [details] Video of Flicker Issue
PR-0065 ======================================= PR-0085 Again, This may be difficult to duplicate. I had left my entire network and the Squeezebox touch on overnight and hit the play button to the previous "Random Mix" playlist from the night before. Then I chose a new shuffled song playlist for the year 1982. And a few minutes later I noticed the flicker. There was nothing unusual as I didn't change any settings on the Squeezebox or my system other than the newly generated playlist. And I haven't had any noticeable problems with the wireless, networking, or internet aspects previously. The screen is not flickering at this point... but I will continue to monitor it.
PR-0087 Screen was Flickering after no use for 48 hours. I had not used the Sqeeze box for the weekend as i was out of town. When i returned the display was flickering. After a reset everything was back to normal.
*** Bug 12303 has been marked as a duplicate of this bug. ***
*** Bug 12314 has been marked as a duplicate of this bug. ***
BUG has returned again with firmware 6068. I created a post http://forums.slimdevices.com/showthread.php?p=432794#post432794
Screen flicker issue is tied to screen drawing/updating. -- If I have a window that has any text scrolling, the flicker is constant and happens multiple times per second. --If I have a menu window with no scrolling it flickers when it first draws (and sometimes a second time) then stops. --If I have the Now Playing screen up with text that doesn't need to scroll, the screen flickers every two seconds when it redraws itself. Interesting this isn't every second, which is what the NP screen should do. I'm seeing the time elapsed go from 1:17 to 1:19 to 1:21, flickering each time. A clue to the cause?
I've not seen this for a while, has anyone else?
(In reply to comment #17) > I've not seen this for a while, has anyone else? Yes, two days ago. I posted in the beta forum about it. http://forums.slimdevices.com/showthread.php?t=68377
Richard and I have both seen this recently. From what I saw when it was happening, it appears that the following is happening for some as yet unknown reason, taking the NP screen as an example: Note: The NP screen triggers a redraw every second (also note: every redraw is a fullscreen redraw) Looking at the elapsed time numbers, I see 00:01 screen draws 00:01 00:02 screen very briefly displays :02 then jumps back to 01 (no full screen flash) 00:03 whole screen flash occurs and screen displays :03 correctly
I'm not sure if this is related or not but I've seen flickering issues at least two times lately when the Touch was about to run out of memory. It had about 2MB free memory when I saw the flickering screen the last time.
== Auto-comment from SVN commit #8006 to the jive repo by richard == == https://svn.slimdevices.com/jive?view=revision&revision=8006 == Bug #11169 Applet for testing screen flicker.
== Auto-comment from SVN commit #8007 to the jive repo by richard == == https://svn.slimdevices.com/jive?view=revision&revision=8007 == Bug #11169 Experimental patch that may fix the screen flicker. This removes some locking to prevent double buffering problems in the video driver. The design of the application means this locking should not be needed, and removing it may fix the problem.
Can QA set up several fab4's, some with r8006 and some with >=r8007. Then go to Settings > Advanced > Test Screen Flicker, and leave them running. Hopefully we'll find r8006 after some time will demonstrate the screen flicker, and the later firmware will not. I don't know how long it'll take to complete the test.
QA started 10 units testing this AM. 5 on 8006 and 5 on 8007, all setup but not on the network
Steven: what progress have you had on this issue?
Eventually all fab4 units would flicker with r8006 and r8007. Any other ideas or any other things I can test?
== Auto-comment from SVN commit #8085 to the jive repo by richard == == https://svn.slimdevices.com/jive?view=revision&revision=8085 == Bug #11169 Fix the screen flicker on fab4. This patch clears the ready flag for the off screen buffer before flipping the buffers. This seems to prevent the IPU from incorrectly displaying the off screen buffer.
Please re-test with this latest patch. I have had 3 fab4s running for nearly 24 hours now in the flicker test applet, and they are all still working fine.
This appears to be fixed, thanks Richard! I left 5 fab4s with r8007 and 5 fab4s with r8095 running screen flicker test over the weekend. They have been running for over 72 hours now. I am happy to report that all of the units with r8095 are still flicker free while all of the units with r8007 are now flickering. Marking bug as fixed.
Woot!
This bug has been marked fixed in a released version of Squeezebox Server or the accompanying firmware or mysqueezebox.com release. If you are still seeing this issue, please let us know!