This is my first time asking something here, so please be as tolerant as possible with any mistake that I make.
The problem:
I have installed ubuntu 18.10 and (sometimes ~70% chance) when I boot up the laptop I see a purple screen and then the lcd turns off (just black, without light).
The same happens 99% of the times, if i leave the laptop for some minutes in inactivity. When I come back, I press buttons or move the mouse and the lcd remains dead.
The same happens 99% of the times, if I wake the laptop from suspension.
While the screen is turned off, I can hear sounds if I hit the volume up/down buttons. Furthermore, I can blindly log in, then press Ctrl+Alt+T, write reboot and press enter (all these blindly), and the laptop reboots, prossibly to the same situation.
I tried the "nomodeset" trick and it worked, but I get a wrong resolution and extremely bad graphics performance, rendering the laptop unusable. The same goes for "radeon.modeset=0".
The same thing happend with Lubuntu 18.04.
Is there any possible solution to this problem? Thanks in advance for any suggestions.
Laptop model: HP pavilion dv6 1120ev
Graphics: ATI Mobility Radeon HD 4530
Code:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] [1002:9553]
Subsystem: Hewlett-Packard Company Mobility Radeon HD 4530 [103c:3628]
Kernel driver in use: radeon
Kernel modules: radeon
Code:
dmesg | grep -i radeon
[ 7.175636] [drm] radeon kernel modesetting enabled.
[ 7.175725] fb: switching to radeondrmfb from VESA VGA
[ 7.176813] radeon 0000:01:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used)
[ 7.176816] radeon 0000:01:00.0: GTT: 1024M 0x0000000020000000 - 0x000000005FFFFFFF
[ 7.181149] [drm] radeon: 512M of VRAM memory ready
[ 7.181151] [drm] radeon: 1024M of GTT memory ready.
[ 7.187901] [drm] radeon: dpm initialized
[ 7.215648] radeon 0000:01:00.0: WB enabled
[ 7.215652] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000020000c00 and cpu addr 0x(____ptrval____)
[ 7.215655] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000020000c0c and cpu addr 0x(____ptrval____)
[ 7.216130] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c598 and cpu addr 0x(____ptrval____)
[ 7.220259] radeon 0000:01:00.0: radeon: MSI limited to 32-bit
[ 7.220355] radeon 0000:01:00.0: radeon: using MSI.
[ 7.220386] [drm] radeon: irq initialized.
[ 8.125000] [drm] radeon atom DIG backlight initialized
[ 8.125001] [drm] Radeon Display Connectors
[ 9.092657] fbcon: radeondrmfb (fb0) is primary device
[ 9.092834] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[ 9.105851] [drm] Initialized radeon 2.50.0 20080528 for 0000:01:00.0 on minor 0