Rohan Garg, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com /daily-live/current/ .
If it remains an issue, could you please just make a comment to this. if reproducible, could you also please test the latest upstream kernel available (v13.3-rc3, as rc4 doesn't have all the necessary files) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags: kernel-fixed-upstream kernel-fixed-upstream-VERSION-NUMBER where VERSION-NUMBER is the version number of the kernel you tested. For example: kernel-fixed-upstream-v3.13-rc3 This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Summary changed: - vgaswitcheroo on the Macbook Pro 8,2 + [Macbook Pro 8,2] Screen blanks when calling vgaswitcheroo -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1171940 Title: [Macbook Pro 8,2] Screen blanks when calling vgaswitcheroo Status in “linux” package in Ubuntu: Incomplete Bug description: Hi By default when you try and switch graphics card on a Macbook Pro 8,2 from the ATI card to the Intel card , the screen is blanked and never turned on. This is due to the driver not knowing about the LVDS Panel mode since the machine was started with the discrete card on. This patch http://cgit.freedesktop.org/~mlankhorst/linux/commit/?id=ae7b687c2a57ec50a9d3dde7b0a80a262fdc8c8 fixes graphics card switching. I have applied this patch on the 3.9.1 and 3.8.2 upstream kernels and it fixes the issue for me. Could this possibly be fixed for S and be SRU'd for Raring? --- ApportVersion: 2.9.2-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: shadeslayer 2556 F.... pulseaudio /dev/snd/controlC0: shadeslayer 2556 F.... pulseaudio DistroRelease: Ubuntu 13.04 HibernationDevice: RESUME=UUID=f6d8363f-0b01-42c3-b0bd-f859a365fd6c InstallationDate: Installed on 2013-03-05 (49 days ago) InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130304) MachineType: Apple Inc. MacBookPro8,2 MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb 1 radeondrmfb ProcKernelCmdLine: ro root=/dev/mapper/kubuntu--vg-root quiet splash initrd=\initrd.img-3.8.0-17-generic ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6 RelatedPackageVersions: linux-restricted-modules-3.8.0-17-generic N/A linux-backports-modules-3.8.0-17-generic N/A linux-firmware 1.106 Tags: raring Uname: Linux 3.8.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 01/24/12 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBP81.88Z.0047.B27.1201241646 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-94245A3940C91C80 dmi.board.vendor: Apple Inc. dmi.board.version: MacBookPro8,2 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-94245A3940C91C80 dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,2:pvr1.0:rvnAppleInc.:rnMac-94245A3940C91C80:rvrMacBookPro8,2:cvnAppleInc.:ct10:cvrMac-94245A3940C91C80: dmi.product.name: MacBookPro8,2 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1171940/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
