Christian, I am afraid, you may stop trying. Use your time for something more useful. Sorry, but with a kernel problem, this problem needs to be solved. First. My interest in workarounds is limited. It is a task of QC to step in for a remedy to a regression.
On 12 November 2017 at 14:21, Christian <tigerma...@gmx.net> wrote: > @udippel What project do I need to file the bug into? Their site is > confusing me. > > Or if you opened a bug yourself, I could piggyback onto it. > > I also tried some more things today (check askubuntu) and none of it > worked. > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1712508 > > Title: > Disappearing screen and flickering after upgrade to 16.04 > > Status in linux package in Ubuntu: > Confirmed > > Bug description: > I have two Lenovo T410s that I upgraded from 14.04 to 16.04. > Since then, one is working fine while the other shows mainly an ever > disappearing screen and flickering. > > I have asked here: https://askubuntu.com/questions/947233/i-upgraded- > from-kubuntu-14-04-lts-to-16-04-lts-and-now-my-screen- > shows-up-and-di?noredirect=1#comment1506995_947233 > I also found I am not the only one: https://askubuntu.com/ > questions/927407/flickering-screen-with-intel-graphics-on- > ubuntu-17-04?noredirect=1#comment1507937_927407 > The latter has tried pretty much that could be tried already, to no > avail. > > I think that I can help with this problem, since my two T410s are > identical in hard- and software, including BIOS, except that one is a > type 2924 (with NVIDIA-card, though disabled in the BIOS), and the > other one is a 2904 (without NVIDIA card). > > I have checked for differences at boot time and found DMAR as major > difference: > T410s, 2924: [ 0.335616] DMAR: Disabling batched IOTLB flush on Ironlake > T410s, 2904: [ 0.355681] DMAR: BIOS has allocated no shadow GTT; > disabling IOMMU for graphics > > Should this be initially at the root of the problem, I'd consider the > kernel package as responsible, therefore I marked it as above. > > The outputs of lspci -k | grep -EA3 'VGA|3D|Display' are identical to > the point. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/ > 1712508/+subscriptions > ** Tags added: regression -- 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/1712508 Title: Disappearing screen and flickering after upgrade to 16.04 Status in linux package in Ubuntu: Confirmed Bug description: I have two Lenovo T410s that I upgraded from 14.04 to 16.04. Since then, one is working fine while the other shows mainly an ever disappearing screen and flickering. I have asked here: https://askubuntu.com/questions/947233/i-upgraded-from-kubuntu-14-04-lts-to-16-04-lts-and-now-my-screen-shows-up-and-di?noredirect=1#comment1506995_947233 I also found I am not the only one: https://askubuntu.com/questions/927407/flickering-screen-with-intel-graphics-on-ubuntu-17-04?noredirect=1#comment1507937_927407 The latter has tried pretty much that could be tried already, to no avail. I think that I can help with this problem, since my two T410s are identical in hard- and software, including BIOS, except that one is a type 2924 (with NVIDIA-card, though disabled in the BIOS), and the other one is a 2904 (without NVIDIA card). I have checked for differences at boot time and found DMAR as major difference: T410s, 2924: [ 0.335616] DMAR: Disabling batched IOTLB flush on Ironlake T410s, 2904: [ 0.355681] DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics Should this be initially at the root of the problem, I'd consider the kernel package as responsible, therefore I marked it as above. The outputs of lspci -k | grep -EA3 'VGA|3D|Display' are identical to the point. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1712508/+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
