Bug 16514
| Summary: | Blank laptop panel after loading i915 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | byron |
| Component: | Video(DRI - Intel) | Assignee: | drivers_video-dri-intel (drivers_video-dri-intel) |
| Status: | CLOSED DUPLICATE | ||
| Severity: | normal | CC: | byron, gordon.jin, maciej.rutecki, rjw |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.34.2, 2.6.35 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 16055 | ||
A quick bisect points to this patch as the source of trouble: commit b8c63c5fbc0e8d124f9e15cbbb0585b762efa08d Author: Jesse Barnes <jbarnes@virtuousgeek.org> Date: Mon Jul 26 13:51:22 2010 -0700 drm/i915: make sure we shut off the panel in eDP configs commit 5620ae29f1eabe655f44335231b580a78c8364ea upstream. Fix error from the last pull request. Making sure we shut the panel off is more correct and saves power. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> :040000 040000 92b89828b32273d2ffc0e27adb697078178baff1 8138149cd70f9bb5dc11c61c0c648a2f477a67f3 M drivers Unfortunately, I did get it to work once, even with this commit, so I'm not sure how accurate the bisect is. Confirmed, after dropping b8c63c5fbc0e8d124f9e15cbbb0585b762efa08d from 2.6.34.2, the laptop display works on every boot. First-Bad-Commit : b8c63c5fbc0e8d124f9e15cbbb0585b762efa08d Let's track at https://bugs.freedesktop.org/show_bug.cgi?id=29278 *** This bug has been marked as a duplicate of bug 16496 *** |
Hardware - Dell Latitude E6410 Video Card - 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller]) Subsystem: Dell Device 040a Flags: bus master, fast devsel, latency 0, IRQ 28 Memory at f0000000 (64-bit, non-prefetchable) [size=4M] Memory at e0000000 (64-bit, prefetchable) [size=256M] I/O ports at 70b0 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915 Kernel modules: i915 Kernel Versions That Work: 2.6.34, 2.6.34.1 Kernel Versions That Do Not Work: 2.6.34.2, 2.6.35 Problem: Blank screen after loading i915 module. After loading the i915 module from one of the affected kernels, the laptop display panel is blank, but backlit. After starting X, "xrandr --output DP1 --off; xrandr --output DP1 --auto" turns the backlight off and then on again, but the display remains blank. Booting the laptop in a docking station with an external monitor attached shows the display on the external monitor.