Message ID | 20231107102546.39000-1-philip.cox@canonical.com |
---|---|
Headers | show |
Series | Revert: drm/ast: report connection status on Display Port | expand |
Looks like I have found the proper fix for the regression, so will send out the fix shortly On Tue, 2023-11-07 at 12:25 +0200, Philip Cox wrote: > > > BugLink: https://bugs.launchpad.net/bugs/2042850 > > SRU Justification: > > [Impact] > On systems with Aspeed 2600 revision 52 GPUs, the display fails to > progress to the login prompt. Without reverting > > commit: 916ae609a033cbb55661905d310ba2358b7621ea > Author: Jocelyn Falempe <jfalempe@redhat.com> > Date: Thu Jul 13 15:41:31 2023 +0200 > Subject: drm/ast: report connection status on Display Port. > > the kernel command line option of "nomodeset" needs to be passed in > order to have the system reach the login prompt. > > > [Fix] > The fix for now is to revert this change to restore the previous > behaviour. This will restore the functionality that we had prior to > the regression in 6.5.0-6.6. > > [Test Plan] > I have tested this on multiple versions of Aspeed 2600 GPU enabled > BMCs, and the revision 52 systems that required the nomodeset option > to boot, now boot fine, and there is no regression on the other > systems. > > [Where problems could occur] > As this reverts the mantic kernel's Aspeed GPU driver to the state it > was was in the mantic 6.5.0-5.5 kernel, I think there is little room > for regressions. > > ---- > > Philip Cox (1): > UBUNTU: SAUCE: (no-up) Revert "drm/ast: report connection status on > Display Port." > > drivers/gpu/drm/ast/ast_dp.c | 11 ---------- > drivers/gpu/drm/ast/ast_dp501.c | 37 +++++++++++-------------------- > -- > drivers/gpu/drm/ast/ast_drv.h | 2 -- > drivers/gpu/drm/ast/ast_mode.c | 30 ++------------------------ > 4 files changed, 14 insertions(+), 66 deletions(-) >