Dominic Chambers, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1388647/comments/13 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.
** Changed in: xorg (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1388647 Title: DRI_PRIME=1 has no effect in Ubuntu 14.10 Status in xorg package in Ubuntu: Invalid Bug description: On an Optimus laptop with both GPUs enabled, having run this command so that the Nvidia GPU can be used to offload 3D work from the Intel GPU: ``` xrandr --setprovideroffloadsink nouveau Intel ``` Then running this command: ``` DRI_PRIME=1 glxinfo | grep "OpenGL vendor string" ``` provides the incorrect output: ``` OpenGL vendor string: Intel Open Source Technology Center ``` when it should actually show that the Nouveau driver is in use for the program. This worked previously in Ubuntu 14.04. Apart from only having a 3.16 kernel (instead of 3.17) Ubuntu 14.10 actually supports recent enough versions of the requisite packages necesarry to get DRI 3 offloading support, so perhaps this is part of the problem. Or, more likely, I notice a Nouveau failure after startup, and then again after running xrandr commands, for example: ``` [ 170.912483] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 217.550205] thinkpad_acpi: EC reports that Thermal Table has changed [ 223.857442] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95) [ 223.858395] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95) [ 223.860200] nouveau E[ PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x002140 [ !ENGINE ] [ 224.654622] thinkpad_acpi: EC reports that Thermal Table has changed [ 825.172094] thinkpad_acpi: EC reports that Thermal Table has changed [ 831.132156] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95) [ 831.133030] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95) [ 831.134832] nouveau E[ PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x002140 [ !ENGINE ] ``` Perhaps this is just a regression in either the Nouveau or Intel drivers for my hardware. I'm using a Lenovo T430. I can confirm that I'm able to start the laptop without errors when I only enable the Intel GPU or NVidia GPU separately, and only see this error when both GPUs are enabled simultaneously. Extra Info: 1: Description: Ubuntu 14.10 Release: 14.10 2: N/A 3: The text 'nouveau' should have appeared in the output of the command. 4: The text 'Intel' appeared in the output of the command. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1388647/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp