"I: update-initramfs is disabled (live system is running on read-only media)" ...
I've got a relatively old laptop with an ATI Radeon HD card, which
firmware I can't update. Wild pixelations happen even on relatively
simple pages not just videos. It seems to be a common problem. What I
have searched and found out is that I will have to un/repack initramfs
..., but I haven't found a relatively safe, complete procedure.
How can you update the initramfs on read-only media?
$ sudo lspci | grep "VGA\|Radeon"
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] Wrestler [Radeon HD 6320]
$ sudo hwinfo --gfxcard
11: PCI 01.0: 0300 VGA compatible controller (VGA)
[Created at pci.386]
Unique ID: vSkL.bvK4VqmPxPA
SysFS ID: /devices/pci0000:00/0000:00:01.0
SysFS BusID: 0000:00:01.0
Hardware Class: graphics card
Model: "ATI Wrestler [Radeon HD 6320]"
Vendor: pci 0x1002 "ATI Technologies Inc"
Device: pci 0x9806 "Wrestler [Radeon HD 6320]"
SubVendor: pci 0x17aa "Lenovo"
SubDevice: pci 0x21ec
Driver: "radeon"
Driver Modules: "radeon"
Memory Range: 0xe0000000-0xefffffff (ro,non-prefetchable)
I/O Ports: 0x3000-0x30ff (rw)
Memory Range: 0xf0300000-0xf033ffff (rw,non-prefetchable)
Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled)
IRQ: 26 (4041584 events)
I/O Ports: 0x3c0-0x3df (rw)
Module Alias: "pci:v00001002d00009806sv000017AAsd000021ECbc03sc00i00"
Driver Info #0:
Driver Status: radeon is active
Driver Activation Cmd: "modprobe radeon"
Driver Info #1:
Driver Status: amdgpu is active
Driver Activation Cmd: "modprobe amdgpu"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Primary display adapter: #11
$ sudo dmesg | grep --ignore-case "VGA\|video\|display\|Radeon"
[ 0.226971] Console: colour VGA+ 80x25
[ 0.287622] smpboot: CPU0: AMD E-450 APU with Radeon(tm) HD
Graphics (family: 0x14, model: 0x2, stepping: 0x0)
[ 0.417444] acpi PNP0A08:00: ignoring host bridge window [mem
0x000ce000-0x000cffff window] (conflicts with Video ROM [mem
0x000c0000-0x000ce5ff])
[ 0.418510] pci 0000:00:01.0: Video device with shadowed ROM at
[mem 0x000c0000-0x000dffff]
[ 0.457408] pci 0000:00:01.0: vgaarb: setting as boot VGA device
[ 0.457408] pci 0000:00:01.0: vgaarb: bridge control possible
[ 0.457408] pci 0000:00:01.0: vgaarb: VGA device added:
decodes=io+mem,owns=io+mem,locks=none
[ 0.457408] vgaarb: loaded
[ 4.436446] ACPI: video: Video Device [VGA1] (multi-head: yes rom:
no post: no)
[ 4.436916] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01/input/input9
[ 5.659994] [drm] radeon kernel modesetting enabled.
[ 5.660219] radeon 0000:00:01.0: vgaarb: deactivate vga console
[ 5.662092] radeon 0000:00:01.0: VRAM: 384M 0x0000000000000000 -
0x0000000017FFFFFF (384M used)
[ 5.662100] radeon 0000:00:01.0: GTT: 1024M 0x0000000018000000 -
0x0000000057FFFFFF
[ 5.662185] [drm] radeon: 384M of VRAM memory ready
[ 5.662191] [drm] radeon: 1024M of GTT memory ready.
[ 5.662317] radeon 0000:00:01.0: firmware: direct-loading firmware
radeon/PALM_pfp.bin
[ 5.662374] radeon 0000:00:01.0: firmware: direct-loading firmware
radeon/PALM_me.bin
[ 5.662433] radeon 0000:00:01.0: firmware: direct-loading firmware
radeon/SUMO_rlc.bin
[ 5.662693] [drm] radeon: dpm initialized
[ 5.663081] radeon 0000:00:01.0: firmware: direct-loading firmware
radeon/SUMO_uvd.bin
[ 5.684961] radeon 0000:00:01.0: WB enabled
[ 5.684968] radeon 0000:00:01.0: fence driver on ring 0 use gpu
addr 0x0000000018000c00
[ 5.684974] radeon 0000:00:01.0: fence driver on ring 3 use gpu
addr 0x0000000018000c0c
[ 5.685422] radeon 0000:00:01.0: fence driver on ring 5 use gpu
addr 0x0000000000072118
[ 5.685956] radeon 0000:00:01.0: radeon: MSI limited to 32-bit
[ 5.686097] radeon 0000:00:01.0: radeon: using MSI.
[ 5.686153] [drm] radeon: irq initialized.
[ 6.331634] radeon 0000:00:01.0: [drm] Skipping radeon atom DIG
backlight registration
[ 6.338785] [drm] Radeon Display Connectors
[ 6.338819] [drm] VGA-1
[ 6.785182] fbcon: radeondrmfb (fb0) is primary device
[ 7.350484] radeon 0000:00:01.0: [drm] fb0: radeondrmfb frame buffer device
[ 7.363349] [drm] Initialized radeon 2.50.0 20080528 for
0000:00:01.0 on minor 0
[ 25.811867] thinkpad_acpi: This ThinkPad has standard ACPI
backlight brightness control, supported by the ACPI video driver
$
lbrtchx
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