[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
Here's something: The stutter occurs when using HDMI with my primary monitor, but not with my HDTV. Monitor: Acer S231HLbid http://www.newegg.com/Product/Product.aspx?Item=N82E16824009255 TV: Samsung LN37A550 http://www.amazon.com/Samsung-LN37A550-37-Inch-1080p-HDTV/dp/B00141AZR2 The root cause must lay in the difference between these two products. There is no stutter with either product using Windows or Mac. So it's strictly a Ubuntu thing, rather than a flaw with the monitor's hardware. I think if we want to understand the problem, it's worth trying to pin down exactly what is different between these two displays. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
I've attached the manuals for the two displays. The relevant pages seem to be: Samsung Manual: p44 (labeled 42), discusses HDMI in CEA mode for 1080p Acer Manual: p12, standard timing table My best guess for what is happening is that Ubuntu's display output timing over HDMI is slightly out of sync with what the Acer monitor expects, and hence some kind of re-sync process is happening about once a second. Or the timing of the laptop's built-in display is slightly different than that of the external monitor, causing the noveau driver to freak out about once a second as it tries to reconcile this. In my Xorg log file, I see a lot of stuff like this: [ 1878.231] (II) intel(0): EDID vendor LGD, prod id 489 [ 1878.231] (II) intel(0): Printing DDC gathered Modelines: [ 1878.231] (II) intel(0): Modeline 1920x1080x0.0 138.50 1920 1968 2000 2080 1080 1083 1088 -hsync -vsync (66.6 kHz eP) [ 1879.796] (II) intel(0): Allocated new frame buffer 3840x1080 stride 15360, tiled [ 2099.091] (II) intel(0): EDID vendor LGD, prod id 489 [ 2099.091] (II) intel(0): Printing DDC gathered Modelines: [ 2099.091] (II) intel(0): Modeline 1920x1080x0.0 138.50 1920 1968 2000 2080 1080 1083 1088 -hsync -vsync (66.6 kHz eP) [ 2111.153] (II) intel(0): EDID vendor LGD, prod id 489 [ 2111.153] (II) intel(0): Printing DDC gathered Modelines: [ 2111.154] (II) intel(0): Modeline 1920x1080x0.0 138.50 1920 1968 2000 2080 1080 1083 1088 -hsync -vsync (66.6 kHz eP) [ 2124.123] (II) intel(0): EDID vendor LGD, prod id 489 [ 2124.123] (II) intel(0): Printing DDC gathered Modelines: But if I look at the monitor's own menu, I see that the reported refresh rates are H:68KHz, V:60Hz The differences here seem like a likely culprit to me. ** Attachment added: display_manuals.zip https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+attachment/3564050/+files/display_manuals.zip -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
Here's even more information. The output of 'xrandr --prop' with VGA and with HDMI connected ** Attachment added: VGa xrandr --prop output https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+attachment/3564104/+files/VGA%20xrandr%20prop.txt -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
** Attachment added: HDMI xrandr --prop output https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+attachment/3564105/+files/HDMI%20xrandr%20prop.txt -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
FYI, Ubuntu 12.10 has the same issue with my monitor + HDMI. The freezes seem to be about 100ms in duration, and occur regularly every 1s. It's incredibly irritating. Output of vmstat: procs ---memory-- ---swap-- -io -system-- cpu r b swpd free buff cache si sobibo in cs us sy id wa 0 0 0 13850796 84292 128912000 25025 92 403 2 1 97 0 I installed perf, but I'm not exactly sure what to look for (nothing stuck out). Chris, can you let me know what else I can provide to be more helpful? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
Just purchased a System76 Gazelle Professional laptop, and it has the same problem with 12.04. It seems this bug cuts across hardware configurations. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
This is still a problem with Precise (12.04). -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
[Ubuntu-x-swat] [Bug 964231] Re: System Stutter When HDMI Monitor Is Connected
Bump. This bug is still out there, making HDMI utterly unusable with Ubuntu on my laptop! -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/964231/+subscriptions ___ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
