Bug 94231
| Summary: | kernel 3.14.? - i915 - screen LVDS1 turns black early at boot | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | charles17 |
| Component: | Video(DRI - Intel) | Assignee: | intel-gfx-bugs (intel-gfx-bugs) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | intel-gfx-bugs |
| Priority: | P1 | ||
| Hardware: | x86-64 | ||
| OS: | Linux | ||
| Kernel Version: | 3.14 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
lspci -vvv -s 00_02.0
dmesg without VGA plugged reverse git bisect Kernel configuration |
||
Created attachment 168871 [details]
dmesg without VGA plugged
Created attachment 168881 [details]
reverse git bisect
I did a reverse git bisect leading to 484b41dd70a9fbea894632d8926bbb93f05021c7
$ git branch --contains 484b41dd70a9fbea894632d8926bbb93f05021c7
master
$ git tag --contains 484b41dd70a9fbea894632d8926bbb93f05021c7
v3.15
v3.15-rc1
v3.15-rc2
v3.15-rc3
v3.15-rc4
... until ...
v3.19-rc6
v3.19-rc7
Checked out v.3.15 for testing and was ok.
Created attachment 168891 [details]
Kernel configuration
Thanks for the reverse bisect, however the commit is too big to be backported to stable kernels. Please upgrade to v3.15 or later. Thanks for the report. |
Created attachment 168861 [details] lspci -vvv -s 00_02.0 Screen LVDS1 turns black early at boot with kernel 3.14 The computer is a laptop and has been used with an external screen plugged (VGA) for several months. After unplugging the VGA from the laptop I was getting a black screen at boot. Grub2 screen is ok but in the very early stage at boot just after showing the first few kernel lines the built-in screen turns black. CTRL-ALT-F1 + CTRL-ALT--F7 does not help. Built-in screen stays black until a VGA is plugged. With the VGA plugged (even when it's power is off) the boot is normal with all the boot messages visible on the built-in screen. This behaviour is reproducible: VGA plugged: Screen is ok VGA unplugged: Screen tuns black at boot The problem seems to be fixed later in kernel v3.15